query: when was the last time crater lake volcano erupted

pos: Mount Mazama created Wizard Island. The central platform was created by a similar vent eastward of Wizard Island, made up of effusive lava that created lava fields northward and eastward of its vent. Merriam cone does not have a summit crater, but rises to above the northern lake floor. Merriam cone was produced underwater, and was probably formed at the same or similar time as Wizard Island and the central platform. Mazama was last active about 4,800 years ago, when an eruption took place near Wizard Island's eastern base. This eruption took place underwater, and it produced viscous lava that created a

neg: Lake Barrine Lake Barrine Lake Barrine is a freshwater lake situated on the eastern parts of Atherton Tableland in the locality of Lake Barrine, Tablelands Region, Far North Queensland, Australia, close to Lake Eacham. The lake and surrounds are protected within the Crater Lakes National Park and are accessible via the Gillies Highway. Lake Barrine was formed over 17,000 years ago when a large volcano erupted, leaving a crater that over time filled up with water to create a lake. The crater or maar was formed as a result of a series of volcanic explosions. These explosions were caused by the hot

neg: Grafton Volcano a diameter explosion crater filled with a solidified lava lake (basalt) at least thick, which underlies and surrounds scoria cones that erupted from two vents within the crater (at Outhwaite Park and the east end of Auckland Hospital). Most of Grafton Volcano is buried beneath of volcanic ash that forms the western sector of the adjacent Auckland Domain tuff ring. Subsurface information suggests that the Domain Volcano probably erupted 5–100 years after the Grafton Volcano from a separate batch of magma that rose most of the way up the same conduit. The Domain explosion crater erupted east of Grafton Volcano

neg: Lake Meke Lake Meke Lake Meke () is a crater lake composed of two nested lakes located in Konya Province, central Turkey. It is a registered natural monument of the country and a Ramsar site. Lake Meke is located in Karapınar district of Konya Province. It is away from Karapınar, and south of the Konya-Adana highway . It was formed by the flooding of the crater of an extinct volcano, which took shape about 4 million years ago when the volcano erupted. About 9,000 years ago, a second eruption formed another volcanic cone inside the lake with a maar. Lake Meke now

neg: Pisgah Crater to the southeast. The crater and much of the surrounding lava field are on private property. Despite this, the lava tubes in the area are a somewhat popular and easily accessible destination for caving. Historic Lavic Siding is to the east, with the Mojave National Preserve beyond. There is no reliable date of when Pisgah Crater last erupted. Some believe that Pisgah Volcano is the youngest vent, of four cinder cones, in the Lavic Lake volcanic field. There may have been activity at this site as recently as 2,000 years ago; however others believe that the last eruption occurred as

neg: Poás Volcano at the crater is limited. Only the main crater observation area is open as of September 2018. Adjacent trails including the trail to the Lake Botos remain closed. Poás Volcano The Poás Volcano, (), is an active stratovolcano in central Costa Rica and is located within Poas Volcano National Park. It has erupted 40 times since 1828, including April 2017 when visitors and residents were evacuated. The volcano and surrounding park were closed for nearly 17 months, with a 2.5 kilometer safety perimeter established around the erupting crater. As of September 1, 2018 the park has reopened with limited access

neg: Poás Volcano National Park the Alajuela Province near the Pacific coast of Costa Rica, which encompasses the area around the Poás Volcano. The main crater is deep and is quite active with frequent small geyser and lava eruptions, however the last major eruptions were during 1952-54. Two more craters make up parts of the park, the extinct Von Frantzuis crater and the Botos crater. Botos is a beautiful cold, green water crater lake with a diameter of . The Botos crater has not erupted for about 7,500 years. Well-marked trails lead to the two inactive craters, conditions permitting. The park has been frequently closed

neg: Wizard Island Wizard Island Wizard Island is a volcanic cinder cone which forms an island at the west end of Crater Lake in Crater Lake National Park, Oregon. The top of the island reaches above sea level, about above the average surface of the lake. The cone is capped by a volcanic crater about wide and deep. The crater was named the "Witches Cauldron" by William Gladstone Steel in 1885, who also gave Wizard Island its name at the same time. The land area of the island is . Wizard Island was created after Mount Mazama, a large complex volcano, erupted violently

neg: Kauhakō Crater the surface of the lake and lifeforms, including shrimp and plankton, to disappear. Kauhakō Crater is thought to have formed around 230,000 to 300,000 years ago. Somewhere within this time period, Pu'u 'Uao, an undersea volcano located near what is now the peninsula, first erupted. After this, it continued to erupt several more times, spewing hot, fast lava. When this lava eventually cooled, the peninsula was formed, including Kauhakō Crater. Kauhakō Crater is found in the center of the Kalaupapa Peninsula. It is located inside a volcanic rim, which is roughly above sea level, making it the highest point on

neg: Poás Volcano Poás Volcano The Poás Volcano, (), is an active stratovolcano in central Costa Rica and is located within Poas Volcano National Park. It has erupted 40 times since 1828, including April 2017 when visitors and residents were evacuated. The volcano and surrounding park were closed for nearly 17 months, with a 2.5 kilometer safety perimeter established around the erupting crater. As of September 1, 2018 the park has reopened with limited access only to the crater observation area and requires a reservation to be made on the National Park Website. Adjacent trails to Lake Botos as well as the museum

neg: Reykjahlíð it is possible to go to many sights in the area, most notably Krafla. The volcano last erupted in 1984, but the vapour of a warm lava field and of sulphur springs can still be seen. Not far from there is the crater Víti (meaning "hell" in Icelandic), but looking today rather harmless with a blue lake at its bottom. Its apparent tranquility belies the fact that its last eruption was as recent as 1976. Other interesting places are on the lake itself, like the volcano Hverfjall, the pseudo-craters of Skútusstaðir and Dimmuborgir (a strange lava formation). A local airport

neg: Cascade Volcanoes since the Great Slide of 1921. Mount Hood was last active about 200 years ago, creating pyroclastic flows, lahars, and a well-known lava dome close to its peak called Crater Rock. Between 1856 and 1865, a sequence of steam explosions took place at Mount Hood. A great deal of volcanic activity has occurred at Newberry Volcano, which was last active about 1,300 years ago. It has one of the largest collections of cinder cones, lava domes, lava flows and fissures in the world. Medicine Lake Volcano has erupted about eight times in the past 4,000 years and was last active

neg: Cosigüina Cosigüina Cosigüina (also spelt Cosegüina) is a stratovolcano located in the western part of Nicaragua. It forms a large peninsula extending into the Gulf of Fonseca. The summit is truncated by a large caldera, 2 x 2.4 km in diameter and 500 m deep, holding a substantial crater lake (Laguna Cosigüina). This cone has grown within an earlier caldera, forming a somma volcano. The earlier caldera rim is still exposed on the north side, but has been buried by the younger cone elsewhere. The volcano last erupted in 1859, but its most famous activity occurred on January 20, 1835, when

neg: Brothers Volcano industry. The volcano was created by a subduction of the Pacific Plate under the Australian Plate. It is still unknown when the Brothers Volcano last erupted, but the crater walls tell us that its last eruption was so explosive that it caused the volcano to blow out a caldera. A joint expedition by the United States, New Zealand and Germany mapped the volcano in detail in 2007. Submarine volcanoes are not monitored by any organization, but have become a central interest in current expeditions. Brothers Volcano The Brothers Volcano is a Pacific Ocean submarine volcano in the Kermadec Arc, 340

neg: Azhdahak Azhdahak Azhdahak () is a volcano in Armenia, the highest point of Gegham mountains. It has an elevation of 3,597 m above sea. It is part of the Ghegam Ridge volcanic field, which last erupted at 1900 BC ± 1000 years. There is lake in the crater of volcano Azhdahak that is formed from melting snow. From the top of the mountain opens pictorial landscape of mountains Ararat, Hatis, Ara, Aragats, Lake Sevan, the whole Gegham mountains and Kotayk valley. In the surroundings of Azhdahak there is a lake Akna ( "Aknalich") of volcanic origin, “Akn” means "spring (water)" in

neg: Solfatara (volcano) Solfatara (volcano) Solfatara () is a shallow volcanic crater at Pozzuoli, near Naples, part of the Phlegraean Fields () volcanic area. It is a dormant volcano, which still emits jets of steam with sulfurous fumes. The name comes from the Latin, "Sulpha terra", "land of sulfur", or "sulfur earth". It was formed around 4000 years ago and last erupted in 1198 with what was probably a "phreatic" eruption - an explosive steam-driven eruption caused when groundwater interacts with magma. The crater floor is a popular tourist attraction, as it has many fumaroles and mud pools. The area is well known

neg: Younger Dryas ice cores, glaciers, lake- and marine-sediment cores, and terrestrial sequences. Also in 2018, evidence of a 31km diameter impact crater was found below the Greenland ice cap, along with evidence of impact shock quartz which — it was speculated — might have been connected with the Younger Dryas period. The Laacher See volcano erupted at approximately the same time as the beginning of the Younger Dryas, and has historically been suggested as a possible cause. Laacher See is a maar lake, a lake within a broad low-relief volcanic crater about 2 km (1.2 mi) diameter. It is in Rhineland-Palatinate, Germany,

neg: Masaya Volcano health problems. The floor of Masaya caldera is mainly covered by poorly vegetated ʻaʻā lava, indicating resurfacing within the past 1000 or so years, but only two lava flows have erupted since the sixteenth century. The first, in 1670, was an overflow from the Nindiri crater, which at that time hosted a 1-km-wide lava lake. The other, in 1772, issued from a fissure on the flank of the Masaya cone. Since 1772, lava has appeared at the surface only in the Santiago pit crater (presently active and persistently degassing) and possibly within Nindiri crater in 1852. A lake occupies the

neg: Lake Ashi Lake Ashi , also referred to as Hakone Lake or Ashinoko Lake, is a scenic lake in the Hakone area of Kanagawa Prefecture in Honshū, Japan. It is a crater lake that lies along the southwest wall of the caldera of Mount Hakone, a complex volcano that last erupted in 1170 CE at Owakudani. The lake is known for its views of Mt. Fuji, its numerous hot springs, historical sites, and ryokan. The lake is located on the Tōkaidō road, the main link between Kyoto and Tokyo. A number of pleasure boats and ferries traverse the lake, providing scenic views

neg: Showa crater year, at an elevation of 800 feet. It continued to have intermittent eruptions for the next, almost a decade. There was a large lava flow out of Showa crater in 1946, which destroyed the village of Kurokami. In July 1948 Showa stopped erupting and remained quiet for 58 years. The dormancy ended in 2006, when eruptions out the crater resumed. Examples of events at Showa crater (see also Sakurajima volcano) Showa crater Showa crater is a feature on Sakurajima mountain volcano, in southern Japan. On 18 August 2013, the volcano erupted from Showa crater and produced its highest recorded plume

neg: Tolmachev Dol to the Opala volcano. 300 CE, the last eruption took place (GVP). Tolmachev Dol Tolmachev Dol () (Tolmachev Plateau) is a volcanic highland located in the southern part of Kamchatka Peninsula, Russia, northeast of Opala volcano. The cones and lava fields cover a broad area around Lake Tolmachev. Tolmachev Dol is a large volcanic field, consisting of cinder cones and lava flows (GVP). It has principally erupted andesite and dacite. Activity in the volcanic field commenced during the Pleistocene (GVP). The Chasha crater was the site of a large eruption about 4,609 ± 33 years before present, which ejected about

neg: Lassen Peak Lassen became volcanically active again after 27,000 years of dormancy, when it produced a steam explosion that carved out a small crater with a fairly deep lake on the volcano's summit. The crater grew as it was carved by more than 180 similar phreatic explosions over the span of more than 11 months, reaching a length of . On May 14, 1915, Lassen Peak erupted lava blocks, which extended as far as Manton, west of the mountain. By the next day, the volcano had produced a dacitic lava dome, between 63 and 68 percent silica, which occupied its summit crater.

neg: Mount Nyiragongo the silica content is high enough to slow most Hawaiian flows to walking pace. Not much is known about how long the volcano has been erupting, but since 1882, it has erupted at least 34 times, including many periods where activity was continuous for years at a time, often in the form of a churning lava lake in the crater. The existence of the lava lake had been suspected for some time, but was not scientifically confirmed until 1948. At that time, it was measured at nearly . Subsequent expeditions showed that the lake fluctuated in size, depth, and temperature

neg: Chato Volcano Chato Volcano Chato Volcano, sometimes called "Cerro Chato" (Spanish for, literally, "Flat Hill"), is an inactive volcano in north-western Costa Rica north-west of San José, in the province of Alajuela, canton of San Carlos, and district of La Fortuna. It is southeast of the nearby Arenal Volcano It is believed Cerro Chato first erupted 38,000 years ago during the Pleistocene period and last erupted about 3,500 years ago. One of the lava flows is now the route for La Fortuna Waterfall. The hill has two peaks, named Chatito (little Chato) and Espina (Thorn). A crater about wide is filled with

neg: Poás Volcano causing damage to surrounding ecosystems and often irritation of eyes and lungs. Lake Botos, the southern lake, fills an inactive crater, which last erupted in 7500 BC. It is cold and clear, and is surrounded by a cloud forest within the National Park boundaries. On May 17, 1953, an eruption occurred that started a cycle that lasted until 1956. At least two people were reported missing. Poás was near the epicenter of a 6.1-magnitude earthquake in January 2009 that killed at least forty people and affected Fraijanes, Vara Blanca, Cinchona (the most affected area), the capital San José, and the

neg: Medicine Lake Volcano is believed that the Medicine Lake volcano is unique, having many small magma chambers rather than one large one. Medicine Lake is in the caldera of the volcano, which measures . The caldera may have formed by collapse after a large volume of andesite was erupted from vents along the caldera rim. The distribution of late Pleistocene vents, mostly concentrated along the rim, suggests that ring faults already existed when most of the andesite erupted. No single large eruption has been related to caldera formation. The only eruption recognized to have produced ash flow tuff occurred in late Pleistocene time,

neg: Punchbowl Crater Punchbowl Crater Punchbowl Crater is an extinct volcanic tuff cone located in Honolulu, Hawaii. It is the location of the National Memorial Cemetery of the Pacific. The crater was formed some 75,000 to 100,000 years ago during the secondary activity of the Honolulu Volcanic Series. A crater resulted from the ejection of hot lava through cracks in the old coral reefs which, at the time, extended to the foot of the Koolau Mountain Range. The volcano is most likely a monogenetic volcano, meaning that it only erupted once. Although there are various translations of the Punchbowl's Hawaiian name, "Puowaina," the

neg: Punchbowl Crater cemetery; in February 1948 Congress approved funding and construction began. Punchbowl Crater Punchbowl Crater is an extinct volcanic tuff cone located in Honolulu, Hawaii. It is the location of the National Memorial Cemetery of the Pacific. The crater was formed some 75,000 to 100,000 years ago during the secondary activity of the Honolulu Volcanic Series. A crater resulted from the ejection of hot lava through cracks in the old coral reefs which, at the time, extended to the foot of the Koolau Mountain Range. The volcano is most likely a monogenetic volcano, meaning that it only erupted once. Although there

neg: Paektu Mountain Paektu Mountain Paektu Mountain or Baekdu Mountain is an active volcano on the China–North Korea border. At , it is the highest mountain of the Changbai and Baekdudaegan ranges. Koreans assign a mythical quality to the volcano and its caldera lake, considering it to be their country's spiritual home. This mountain is called Changbai Mountain in China. It is the highest mountain on the Korean Peninsula and in Northeast China. A large crater lake, called Heaven Lake, is in the caldera atop the mountain. The caldera was formed by the VEI 7 "Millennium" or "Tianchi" eruption of 946, which erupted

neg: Pichincha Volcano Guagua Pichincha and looked down into the crater of the volcano, which had last erupted in 1660. La Condamine compared what he saw to the underworld. On May 24, 1822, General Sucre's southern campaign in the Spanish-American war of independence came to a climax when his forces defeated the Spanish colonial army on the southeast slopes of this volcano. The engagement, known as the Battle of Pichincha, secured the independence of the territories of present-day Ecuador. Pichincha Volcano Pichincha is an active stratovolcano in the country of Ecuador, whose capital Quito wraps around its eastern slopes. The two highest peaks

neg: Nyamuragira north-north-east. The volcano erupted again on November 5, 2011. That eruption produced a 400-meter high column of lava, and it is said to have been its largest eruption in 100 years. For the first time in 75 years, a new lava lake appeared at the volcano. That is one of the few volcanoes on Earth which have sustained lava lakes for several decades. The last formed lava lake at the volcano was emptied in the 1938 lava flow. The formation of the new lava lake occurred between June and August 2014 . The lava lake has a depth of 500

neg: Showa crater Showa crater Showa crater is a feature on Sakurajima mountain volcano, in southern Japan. On 18 August 2013, the volcano erupted from Showa crater and produced its highest recorded plume of ash since 2006, rising high and causing darkness and significant ash falls on the central part of Kagoshima city. The eruption occurred at 16:31 and was the 500th eruption of the year. Showa crater is monitored with infrared video and regular video cameras. Showa crater is located on the eastern flank of "Minami-dake" (Southern Peak) of Sakurajima volcano. Showa crater appeared in 1939 after one month of eruptions that

neg: Maungawhau Maungawhau Maungawhau / Mount Eden is a scoria cone in the Mount Eden suburb of Auckland, New Zealand. The cone is a dormant volcano and its summit, at above sea level, is the highest natural point on the Auckland isthmus. The majestic bowl-like crater is deep. The volcano erupted from three craters 28,000 years ago, with the last eruptions from the southern crater filling the northern craters. The western face of the hill was extensively quarried. This is the site of a large ecological restoration project run by volunteers. Maungawhau means the 'Mountain of the whau tree ("Entelea arborescens")' in

neg: Masaya be melting gold. But when Fray Bartolomé de las Casas first saw it he called it the "Gates of Hell". Since then, Masaya Volcano has erupted at least 19 times. From 1965 to 1979 the volcano contained an active lava lake. The last reported eruption event was in 2003, when a plume reportedly shot ~4.6 km into the air. Masaya is an unusual basaltic volcano because it has had explosive eruptions. An eruption in 4550 B.C. was one of the largest on Earth in the last 10,000 years. The City of Masaya is also located west of a large, deep

neg: Volcano temperatures for many years after the eruption due to the huge volumes of sulfur and ash released into the atmosphere. They are the most dangerous type of volcano. Examples include Yellowstone Caldera in Yellowstone National Park and Valles Caldera in New Mexico (both western United States); Lake Taupo in New Zealand; Lake Toba in Sumatra, Indonesia; and Ngorongoro Crater in Tanzania. Because of the enormous area they may cover, supervolcanoes are hard to identify centuries after an eruption. Similarly, large igneous provinces are also considered supervolcanoes because of the vast amount of basalt lava erupted (even though the lava flow

neg: Kelud water. Smoke rose more than two kilometres (1.2 miles) into the air, and ash dusted several villages around the volcano. On November 14, smoke billowed into the air, and light ash covered villages away. The hot lava dome occupied the lake crater and, consequently, the lake disappeared. Kelud erupted on February 13, 2014. The eruption occurred at 22:50 local time (UT+7). The eruption sent volcanic ash covering an area of about in diameter, with the total ejectus estimated at being a VEI 4 eruption. Ashfall occurred over a large portion of Java island, from Malang to the west, as well

neg: Île Saint-Paul than at its widest. It is the top of an active volcano, the volcano last erupted in 1793 (from its SW Flank), and is rocky with steep cliffs on the east side. The thin stretch of rock that used to close off the crater collapsed in 1780, admitting the sea through a channel; the entrance is only a few meters deep, thus allowing only very small ships or boats to enter the crater. The interior basin, wide and deep, is surrounded by steep walls up to high. There are active thermal springs. Île Saint-Paul was first discovered in 1559 by

neg: Barrier Volcano flows from Teleki on the northern side and from Andrew's cone on the south side of Kakorinya. The last known eruption was in 1921. Barrier Volcano The Barrier Volcano is an active shield volcano located in the north of Kenya. It is last known to have erupted in 1921. The Barrier Volcano was given its name because it forms a barrier about long across the Kenyan Rift Valley. It has a width of and separates Lake Turkana to the north and the Suguta Valley and the small Lake Logipi to the south. The volcanic complex consists of four distinct volcanoes.

neg: Conguillío National Park fifty meters of fine sand and volcanic capes very well specified and dregs basaltic lava. Also it presents sulfated smoker around the crater. About of the eruptions there is registry of around 37 eruptions counting of 1852, of which those of 1927 and 1957 were the most violent. This record transforms it into one of the most active volcanoes of Chile. The last eruption of the volcano was on January 1, 2008. The park had to be evacuated, including about 150 tourists and employees of CONAF, because at 18:20 hours local time the volcano Llaima erupted. During the eruption, launched

neg: Mount Longonot 2004–2006 demonstrated the presence of active magmatic systems beneath this volcano. On March 21, 2009 Brush Fires burned up the side of the mountain and descended into the crater, trapping wildlife and feeding on drought ravaged brush. Mount Longonot Mount Longonot is a stratovolcano located southeast of Lake Naivasha in the Great Rift Valley of Kenya, Africa. It is thought to have last erupted in the 1860s. Its name is derived from the Maasai word "Oloonong'ot", meaning "mountains of many spurs" or "steep ridges". Mount Longonot is protected by Kenya Wildlife Service as part of Mount Longonot National Park. A

neg: Methana Volcano Methana Volcano The Methana volcano peninsula is situated approximately southwest of Athens in Greece. The Methana (Μέθανα) peninsula contains some 32 volcanoes, including the Methana volcano, that are mostly andesitic and dacitic lava domes. The volcanic activity in the peninsula began 1 million years ago and continued sporadically until 300 years ago. The last eruptions took place in 1700 at a submarine volcano north of Kameni Chora. On land there is also the historic lava dome of Kameni Chora that erupted in 230 BC. In August 1922 there were numerous reports of a possible eruption in the Kaimeno Vouno crater,

neg: Lascar (volcano) Activity subsequently shifted to the eastern edifice. Around 5150 ± 1250 BCE, as obtained by surface exposure dating, the Tumbres-Talabre lava flow was erupted from the eastern crater. This flow extends northwest and is thick. The Tumbres-Talabre flow was originally considered to be of late-19th-century age. It probably formed when one of the craters filled with andesitic lava to the point of overflow. The three eastern summit craters formed at the time when the Tumbres-Talabre flow erupted in the remains of the stage I cone. This edifice is the currently active one, with the deepest of its three summit craters

neg: Planchón-Peteroa Planchón-Peteroa Planchón-Peteroa is a complex volcano extending in a north-south direction along the border between Argentina and Chile. It consists of volcanoes of various ages with several overlapping calderas. Those include Volcán Planchón, Volcán Peteroa and Volcán Azufre. A partial collapse of the complex about 11,500 years ago produced a major debris avalanche, which followed the course of the Teno River until reaching the Chile Central Valley. Peteroa has a crater lake. Lagunas de Teno lies at the foot of Planchón volcano. In this area also is the Vergara International Pass. Planchón-Peteroa Volcano erupted on September 6 followed by a

neg: Mount Washington (Oregon) probably near-primary melts. According to Hughes (1982), examples of Mount Washington basaltic andesites occur at Holocene deposits from Nash Crater, Four-in-One Cone, and Little Belknap Cone, as well as undated deposits at Todd Lake Volcano, Falls Creek, Broken Top, and the abutment of Tumalo Dam. Mount Washington formed during the late Pleistocene epoch; the volcano itself is not older than a few hundred thousand years. Harris (2005) estimates that it has not erupted for more than 250,000 years, similar to Mount Thielsen; this date is supported by James, Manga, and Rose (1999). Paleomagnetic evidence suggests that the volcano and associated

neg: Mount Lokon August 2015 but erupted 13 September 2014 made new historis eruption. Lokon volcano eruption was not in normal crater but outside crater or on western part of crater around 60 m from the crater. WWW.VOLCANOESGUIDE.BLOGSPOT.COM Mount Lokon Mount Lokon, together with Mount Empung, is a twin volcano ( apart) in the northern Sulawesi, Indonesia, roughly south of Manado. Both rise above the Tondano plain and are among active volcanoes of Sulawesi. Mount Lokon has a flat and craterless top. Its active crater is located on its foot, named "Tompaluan" crater. Lokon formed during a period of andesitic volcanism on ring

neg: Mahagnao Volcano heavily forested crater that opens to the south with a peak elevation of . Located on the volcano flanks are fumaroles and mudpots. On the southern flank of the volcano, two crater lakes are located, Lakes Danao and Malagsom. Hot Springs are located on the southern shore of Lake Danao (not to be confused with the other Lake Danao which is located near Ormoc City and part of Lake Danao Natural Park). Lake Malagsom is a crater lake with green acidic water. Rocks primarily found on the volcano are andesite. An eruption was reported to have occurred in 1895 Philippine

neg: Aguilera (volcano) 2014 by a group of Chilean climbers. Aguilera (volcano) Aguilera (e. 2546 m/8353 ft.) is a stratovolcano in southern Chile, which rises above the edge of the Southern Patagonian Ice Field. It is a remote volcano that was identified as such in 1985, but the first ascent only occurred in 2014, making it the last unclimbed major Andean volcano. It is located west of Lake Argentino and northeast of Peel Fjord in the southern Andes and erupted mainly dacites and pyroclastic tephra. It has erupted several times in the Holocene, with a major eruption taking place 3,000 ± 1,000 years

neg: Aguilera (volcano) Aguilera (volcano) Aguilera (e. 2546 m/8353 ft.) is a stratovolcano in southern Chile, which rises above the edge of the Southern Patagonian Ice Field. It is a remote volcano that was identified as such in 1985, but the first ascent only occurred in 2014, making it the last unclimbed major Andean volcano. It is located west of Lake Argentino and northeast of Peel Fjord in the southern Andes and erupted mainly dacites and pyroclastic tephra. It has erupted several times in the Holocene, with a major eruption taking place 3,000 ± 1,000 years before present. Its eruptions have spread ashfalls

neg: Bismarck Archipelago remained unsettled by western Europeans until they were annexed as part of the German protectorate of German New Guinea in 1884. The area was named in honour of the Chancellor Otto von Bismarck. On 13 March 1888, a volcano erupted on Ritter Island causing a megatsunami. Almost the entire volcano fell into the ocean, leaving a small crater lake. Following the outbreak of World War I, the Australian Naval and Military Expeditionary Force seized the islands in 1914 and Australia later received a League of Nations mandate for the islands. They remained under Australian administration—interrupted only by Japanese occupation during

neg: Licancabur BP, and the volcano has not erupted during recorded history. Its crater lake may remain liquid due to geothermal heating. Despite being lower than many neighbouring mountains, Licancabur stands out from other volcanoes in the region and is well-known. The Atacameno people worshiped it, and other high mountains are still considered sacred. Licancabur was considered divine, and attempts to climb it were discouraged and sometimes met by force; climbing it supposedly brought misfortune. It is said that Licancabur would punish people who climbed it, and the volcano is the mate of Quimal in the Cordillera Domeyko; at the solstices, the

neg: Achilles Point as Whakahumu or geologically as the 'St Heliers explosion crater'. It is found in the center of the headland between West Tamaki Head and the eastern end of St Heliers Bay beach. It was filled in during the 1950s to form a public sports field. Before that it formed a seasonal shallow lake or swamp. The seaward side of the tuff crater is falling away down the coastal cliffs to 'Gentleman's Bay' far below. The tuff ring is made from ash and ejected material. The cliffs were there before the volcano erupted so the volcanic rock draped over the clay

neg: Mount Tongariro Tongariro consists of at least 12 cones. Ngauruhoe, while often regarded as a separate mountain, is geologically a cone of Tongariro. It is also the most active vent, having erupted more than 70 times since 1839, the last episode in 1973 to 1975. Activity has also been recorded at other vents in recent history. Te Māri Craters erupted in 2012, for the first time since 1897. Red Crater last erupted ash in 1926 and contains active fumaroles. There are many explosion craters on the massif; water has filled some of these to form the Blue Lake and the Emerald Lakes.

neg: Grand Etang Lake Grand Etang Lake Grand Etang Lake is a crater lake in an extinct volcano. It is located on the island of Grenada, in Saint Andrew Parish. Evidence suggests that the Grand Etang Lake is connected to Kick 'em Jenny, an active submarine volcano to the north. This is because when Kick Em Jenny was observed bubbling, so too were the waters in Grand Etang Lake. The Grand Etang Lake is above sea level and it is one of the two crater lakes on the island (the other being Lake Antoine). The lake is approximately 20 feet deep and 36 acres

neg: Licancabur Lake Licancabur Lake is located on Licancabur, a notable volcano whose cone dominates the Bolivian-Chilean frontier and the surrounding region. This volcano formed in the late Pleistocene, and is potentially active. Two other lakes, Laguna Blanca and Laguna Verde, can be found at the foot of the volcano. Escalante volcano farther north also had a crater lake in 2004. The volcano was considered a holy mountain by the Atacameno people and its climbing discouraged. Nevertheless, stone buildings were found by climbers on the crater rim in 1953. Legend has it that a golden guanaco head can be found in the crater.

neg: Grand Etang Lake Etang Lake is represented on the base of the Coat of arms of Grenada. Grand Etang Lake Grand Etang Lake is a crater lake in an extinct volcano. It is located on the island of Grenada, in Saint Andrew Parish. Evidence suggests that the Grand Etang Lake is connected to Kick 'em Jenny, an active submarine volcano to the north. This is because when Kick Em Jenny was observed bubbling, so too were the waters in Grand Etang Lake. The Grand Etang Lake is above sea level and it is one of the two crater lakes on the island (the

neg: Tequila Volcano and the ash that was in the atmosphere drifted over 11 states with a total number of 57 casualties, however; when the Tequila Volcano erupted, there were no casualties. The Tequila Volcano does not pose a threat to surrounding communities. Being inactive for around 220,000 years it is now covered in vegetation and is easy to access. Visitors can drive to the volcano's crater without any concerns for safety. The Volcano has contributed greatly towards an agave culture where Mexico relies on the rich soils that the volcano created to cultivate blue agave and create the beverage Tequila and Mescal.

neg: Katmai National Park and Preserve cubic kilometers of material was erupted to form a new peak called Southwest Trident from the former site of a large fumarolic pit. Mount Martin is high, standing on a high ridge near Mount Mageik. The summit has a diameter crater, containing fumaroles and sometimes a crater lake. A large lava flow extends from the mountain to fill the upper part of Angle Creek's valley with about five cubic kilometers of material. There have been no significant eruptions from Martin, but the summit emits steam and the volcano is the site of earthquake swarms. Mageik stands on the same sedimentary

neg: Amak Volcano 6700 years BP, carving out U-shaped valleys. At the southwest flank of the island, a crater, likely a maar, can be found amid an alluvial plain. The Amak Volcano has erupted three times in historical times: circa 2550 BC, from 1700–1710, and in 1796; the first of these events was identified with tephrochronology. Each eruption has been characterized by lava flows, and the two most recent eruptions included a crater eruption. Amak Volcano Amak Volcano is a basaltic andesite stratovolcano in the Aleutian Islands of Alaska, USA, from Anchorage. It is located on the eponymous island, from Frosty Volcano and

neg: Arenal Volcano years. The volcano is located at the center of Arenal Volcano National Park in the northern zone of the country, southwest of the La Fortuna district in San Carlos (canton), Costa Rica. Arenal Volcano area is an important watershed for the Arenal Lake Reservoir. The reservoir's water is used for hydroelectric power. It is also connected to the national system. Arenal has several eruptive vents. Chato is a dormant stratovolcanic cone. It is believed Chato first erupted 38,000 years ago during the Pleistocene period and last erupted about 3,500 years ago. Chatito is a lava dome with an elevation of

neg: Barrier Volcano Barrier Volcano The Barrier Volcano is an active shield volcano located in the north of Kenya. It is last known to have erupted in 1921. The Barrier Volcano was given its name because it forms a barrier about long across the Kenyan Rift Valley. It has a width of and separates Lake Turkana to the north and the Suguta Valley and the small Lake Logipi to the south. The volcanic complex consists of four distinct volcanoes. From west to east these are Kalolenyang, Kakorinya, Likaiu West and Likaiu East. The foundation rocks are mainly basalt. About 90% of the volume

neg: Mount Lokon Mount Lokon Mount Lokon, together with Mount Empung, is a twin volcano ( apart) in the northern Sulawesi, Indonesia, roughly south of Manado. Both rise above the Tondano plain and are among active volcanoes of Sulawesi. Mount Lokon has a flat and craterless top. Its active crater is located on its foot, named "Tompaluan" crater. Lokon formed during a period of andesitic volcanism on ring fractures resulting from the Tondano caldera's early to mid-Pleistocene collapse. Recently erupted material remains andesitic in composition and consists of ash plumes and, less commonly, pyroclastic flows and lava domes. The volcano erupted on 15

neg: Taal Volcano and farming crops from the rich volcanic soil. The crater lake on Volcano Island is the largest lake on an island in a lake on an island in the world. Moreover, this lake contains Vulcan Point, a small rocky island that projects from the surface of the crater lake, which was the remnant of the old crater floor that is now surrounded by the wide lake, now referred to as the "Main Crater Lake". Vulcan Point is often cited as the largest third-order island (island in a lake on an island in a lake on an island) in the world,

neg: Arenal Volcano to 5 kilometers where winds again carried the material across the Arenal reservoir (Lake Arenal) and over the town of Tilarán. A northwest wall of one of the craters collapsed and generated several pyroclastic flows. The collapsed crater wall was shaped as a V, about 60 meters deep and 100 meters wide. In this V-shaped crater the lava started to flow again. Flows started to fill the U-shaped crater and deposited materials around the crater. At this time the volcano started to produce regular lava flows, accompanied by intermittent explosions of gases. This was the regular activity of the volcano

neg: Western United States peak in the contiguous 48 states, is in the Sierra Nevada. The Cascades are also volcanic. Mount Rainier, a volcano in Washington, is also over . Mount St. Helens, a volcano in the Cascades erupted explosively in 1980. A major volcanic eruption at Mount Mazama around 4860 BC formed Crater Lake. These mountain ranges see heavy precipitation, capturing most of the moisture that remains after the Coast Ranges, and creating a rain shadow to the east forming vast stretches of arid land. These dry areas encompass much of Nevada, Utah, and Arizona. The Mojave Desert and Sonoran Desert along with

neg: Infiernillo (volcanic group) Hoyo Colorado, La Hoyada and Loma Negra. The first vent erupted 6890 ± 40 BCE as found by radiocarbon dating. The oldest age in the field is 0.83 ± 0.11 mya; other dates found are less than 100,000-200,000 years old. These other volcanoes are located around Niña Encantada lake and include Mesillas and Lagunita. Hoyada volcano is a crater with a diameter of . It is surrounded by tephra falls and forms a long lava flow which after splits into two branches. The presence of levees in the flow indicates that the flow rate diminished during the eruption. Lagunitas volcano

neg: Hverfjall Hverfjall Hverfjall (also known as Hverfell) is a tephra cone or tuff ring volcano in northern Iceland, to the east of Mývatn. It erupted in 2500 BP in the southern part of the Krafla fissure swarm. The crater is approximately 1 km in diameter. Tephra has been carried from Hverfjall all over the Lake Myvatn area. A landslide apparently occurred in the south part of the crater during the eruption, which accounts for the disruption to the round shape of the mountain. During the Age of Settlement, lava flowed from Svortuborgir, at the southern end of Namafjall, around Hverfjall, which

neg: Calbuco (volcano) flows. There was a minor, four-hour eruption on August 26, 1972. Strong fumarolic emission from the main crater was observed on August 12, 1996. The most recent eruption happened in April 2015, when on April 22, the volcano suddenly erupted with little warning, sending a large ash column into the atmosphere; another eruption occurred in the early hours of April 23. A smaller eruption occurred on April 30. The eruptions ranked as a 4 on the Volcanic Explosivity Index. The volcano returned to the lowest alert level on August 18, 2015. Calbuco (volcano) Calbuco ( ; , ) is a

neg: Geology of New Zealand and caused 151 deaths at Tangiwai. The last significant eruption was 1995–96. Ngauruhoe last erupted 1973–75. Taranaki is a perfectly formed andesitic strato-volcano, that last erupted in 1755. Lake Taupo, the largest lake in the North Island, is a volcanic caldera, responsible for rhyolitic eruptions about once every 1,000 years. The largest eruption in the last 65,000 years was the cataclysmic Oruanui Eruption 26,500 years ago, producing 530 cubic kilometres of magma. The most recent eruption, around 233 AD was also a major event, the biggest eruption worldwide in the last 5,000 years. The eruption caused a pyroclastic flow that

neg: Mývatn Approximately 200 years later a vast lava flow, the Younger Laxá-lava, was erupted (see above). The lava dammed up the present Lake Mývatn and also the lakes Sandvatn, Grænavatn and Arnarvatn. The third volcanic cycle began with the Mývatnseldar eruptions in 1724–1729 which commenced with an explosion that formed the crater lake Víti. Later lava flowed from Leirhnjúkur down to the north end of Lake Mývatn, destroying two farms. The Mývatnseldar eruptions are quite similar in character to the recent volcanic activity near Krafla in 1975–1984. The source of both is a central volcano lying between Krafla and Gæsafjöll. Inside

neg: West Crater imply that they resulted from the same movement of magma and were possibly fed by the same magma chambers. The lava dome likely formed before the lava flows erupted, suggested by its steep western side and the appearance of rock from the dome on the western lava flow. The dome's deep depression may have formed when the dome's top collapsed as lava moved out of the volcano during the eruption of the two flows. The human population within of West Crater is slightly more than 500 people, but more than 14,000 people live within of the volcano, and more than

neg: West Crater diameter of . It has a summit crater with a width of and a depth of . The dome still possesses a lobe of lava at the bottom of this summit crater. West Crater's lava dome formed on the floor of a glacial cirque, and has a similar size to the lava dome formed after the 1980 eruption of Mount St. Helens. West Crater has erupted at least two large lava flows since Quaternary time, each of which extend about from the volcano. Emplaced into canyons on the sides of the crater, the flows have just started to be eroded

neg: Taal Volcano July 19, 1874, an eruption of gases and ashes killed all the livestock on the island. From November 12–15, 1878, ashes ejected by the volcano covered the entire island. Another eruption took place in 1904 as a result of which a new outlet was formed in the southeastern wall of the principal crater. The last eruption from the Main Crater was in 1911 which obliterated the crater floor creating the present lake. In 1965, a huge explosion sliced off a huge part of the island, moving activity to a new eruption center, Mount Tabaro. Eruptions have also been recorded in

neg: Belknap Crater Belknap Crater Belknap Crater is a shield volcano in the Cascade Range in the U.S. state of Oregon. Belknap volcano is a Holocene example of the process which built the High Cascade Platform during the Pleistocene. It is a small shield volcano with a capping cinder cone. A number of other eruptions also occurred in the general area during roughly the same time period. About 1,300 years ago (1,330 C years B.P.) a series of small spatter cones formed between Belknap and Blue Lake. North of these, a phreatic explosion blasted out the crater which is today occupied by Blue

neg: Kenneth Sims (geologist) Ross Island and Mt Morning. In particular, Sims has worked and published extensively on Mt Erebus, the world’s southernmost active volcano, including descending into its active crater numerous times to collect recently erupted lava bombs from its persistent lava lake. Sims’ most recent expeditions (2012-2017) have been to study the volcanoes Mt Bird, Mt Terror and Hut Point on Ross Island and also the volcanic cones on Mt Discovery. Sims’ expeditions were funded by the National Geographic Society to film two documentaries and by NSF for research related to volcano hazard assessment. In his research pursuits, Sims has trekked deep

neg: Mount Dana (Alaska) at least 50 volcanoes, including those in the Aleutian archipelago, have erupted in historical time. The state accounts for ~80% of the United States' volcanoes, excluding the seamounts in the area, ~8% of world volcanoes, and most of these are located among the Aleutian Islands. The Aleutian Islands arc serves as the northern boundary of the Pacific Ring of Fire, where tectonic activity generates earthquakes and volcanic eruptions in masses. Made up of intermediate composition calc-alkaline rocks, the volcano hosts remnants of an andesite-based dome, just off the western side of the crater and east of Knutson Lake. It resides

neg: Pipkin (volcano) Pipkin (volcano) Pipkin (also known as Malpais Crater) is a volcano in California, with activity during the Quaternary. The surface of erupted lava flows is weathered, and argon-argon dating and potassium-argon dating has yielded ages of 770,000 ± 40,000 and 600,000 years before present, respectively. The volcano lies in the Rodman Mountains. The high and wide Pipkin cinder cone probably erupted the lava flows which extend to its north and form a lava flow field which has the appearance of a mesa. The cone itself consists of lava bombs and scoria with red and black colours. Lava flows from the

neg: Ina (crater) >10 m in diameter). Latest research suggests Ina is not so young. They looked at well-studied volcanoes on Earth that might be similar to Ina. Ina appears to be a pit crater on a shield volcano, a gently sloping mountain similar to the Kilauea volcano in Hawaii. Kilauea has a pit crater similar to Ina known as the Kilauea Iki crater, which erupted in 1959. As lava from that eruption solidified, it created a highly porous rock layer inside the pit, with underground vesicles as large as three feet in diameter and surface void space as deep as two feet.

neg: Haleakalā National Park legend, the demigod Maui imprisoned the sun here in order to lengthen the day. The Hawaiian National Park Language Correction Act of 2000 was proposed to observe the Hawaiian spelling, but it did not become law. The park features the dormant Haleakalā (East Maui) Volcano, which last erupted sometime between 1480 and 1600 AD. The park is divided into two distinct sections: the summit area and the coastal Kipahulu area. Haleakala National Park superintendents: An extremely winding but well maintained road leads up the mountain. The summit area includes Haleakalā Crater, the summit of the volcano, and the area surrounding

neg: Mount Fraser (Australia) Mount Fraser (Australia) Mount Fraser is a volcanic cone near Beveridge, Victoria, Australia. It is the largest scoria cone near Melbourne. The extinct volcano last erupted about one million years ago. It is about 120 metres in height above the surrounding land. The distance around the base of the volcano is 1200 metres. There are two craters. One crater is wide and shallow, and the other is small and closed. It is listed on the Australian Heritage database. The explorers, Hamilton Hume and William Hovell climbed Mount Fraser on 14 December 1824, and saw Port Phillip Bay. It was called

neg: Concepción (volcano) flow, the volcano grows in mass and exerts pressure on the crust. This causes shifts which in turn causes more volcanic growth. This affects the magma chamber which begins the cycle again with growth because of magmatic flow. Since 1883, Concepción has erupted at least 25 times; its last eruption was on 9 March 2010. Concepción's eruptions are characterized by frequent, moderate-sized explosions. Active fumaroles are present just north of Concepción's summit crater. Adventure seekers from all over the world travel to Ometepe Island to climb Volcán Concepción. There are numerous trails in the tropical forest that surrounds the volcano's

neg: Māngere Mountain Māngere Mountain Māngere Mountain in Māngere Domain is one of the largest volcanic cones in the Auckland volcanic field, with a peak above sea level. It was the site of a major pā (Māori fortified settlement) and many of the pā's earthworks are still obvious. It has extensive panoramic views of Auckland from its location in the suburb of Māngere. It is also known as Te Pane a Mataaho. The volcano features two large craters. It has a wide crater with a lava dome near its centre, a feature shared by no other volcano in Auckland. It last erupted approximately

neg: Ring of Fire of seismic signals, allowing to expedite the analysis of signals and the study using modern computerized methods. Poás Volcano is an active stratovolcano located in central Costa Rica; it has erupted 39 times since 1828. On February 25, 2014, a webcam from the OVSICORI captured the moment a dark cloud exploded about in the air from a massive crater of the Poás Volcano. In 1902, the Santa Maria Volcano erupted violently in Guatemala, with the largest explosions occurring over two days, ejecting an estimated 5.5 km (1.3 mi) of magma. The eruption was one of the largest of the 20th

neg: Kavachi the vent of the volcano was below sea level, but frequent eruptions ejected molten lava up to above sea level, and sulfurous steam plumes up to . The team mapped a roughly conical feature rising from water depth, with the volcano having a basal diameter of about . When the volcano erupted in 2003, a island formed above the surface, but it disappeared soon after. Additional eruptive activity was observed and reported in March 2004 and April 2007. In 2015, marine wildlife has been found living inside the Kavachi crater, including two species of sharks and a sixgill stingray. Kavachi

neg: Kanlaon were reported in some barangays near Kanlaon Volcano. On 2 January, people in Hinigaran got sick. Many suffered from a respiratory illness with cough and flu-like symptoms. In March 29 at 6:20 pm, Kanlaon erupted for 12 minutes which produced a volcanic plume 1500 meters above the crater and a "booming sound" was heard in some barangays near the volcano. According to the police department of Canlaon City, several fire balls, which were coming from the crater of the volcano, started to flow following a booming sound and causing a bush fire. PHIVOLCS issued alert level number 1. No casualties

neg: Cerro Negro 1995 eruption. Following the 1999 eruption, the summit crater and fissures created from this eruption are currently the main source of volcanic gas flux today. It is estimated that the total CO2 output of Cerro Negro is conservatively estimated to be 2,800 t d-1. Although the Cerro Negro volcano has only been around for a period of 159 years, it has erupted at least 23 times, which is highly active compared to most volcanoes. This historical growth of the volcano has allowed for documentation of the growth of this volcano over time. It was discovered that the timing of future

neg: Katia Krafft (Catherine Joséphine Conrad) along with 41 other people, including fellow volcanologist Harry Glicken, several firefighters, and journalists also covering the eruptions. Katia and Maurice started their own volcano center, the Vulcain Volcanology Center in Cernay (Alsace), in 1968. A volcanic crater, M. and K. Krafft Crater, of the volcano Piton de la Fournaise on the island of Reunion, is named after the couple. The crater is located at . Lava erupted from this crater in March 1998. The Centre for the Study of Active Volcanoes at the University of Hawaii at Hilo has established a fund in memory of the Krafft's (The Maurice

neg: Geology of Cameroon seawater intrusion. The Garoua Basin and Lake Chad Basin Aquifer are also important water supplies, often with Cretaceous sandstones at the base. Mount Cameroon is the only active volcano in the country, but has erupted frequently in recent history, including seven times in the 20th century destroying plantations and parts of the surrounding landscape in 1909, 1922, 1959, 1982, 1999 and 2000. Cameroon has very active and dangerous crater lakes that accumulate and periodically release carbon dioxide causing the mass death during the Lake Nyos disaster in 1986, which killed 1700 people, as well as the deadly 1984 release at

neg: Jala, Nayarit packing plant for peaches, and several small transformation industries. The main site of touristic interest is the volcano of Ceboruco. It is reached by an 18-km stone-covered road from the main highway. The crater is a 3-km walk up a path from the end of the road. Ceboruco last erupted from 1870 until 1872 to produce a large flank flow of andesite. According to researchers, in prehistoric times Ceborucco had at least 2 very large eruptions that produced 2 concentric calderas. Ceborucco rises about 1000 m above its base and has a summit elevation of . The original volcano was

neg: Te Tatua-a-Riukiuta Te Tatua-a-Riukiuta Te Tātua-a-Riukiuta (also known as Three Kings) is a volcano in Three Kings, New Zealand that erupted 28,500 years ago. The volcano had three prominent peaks and a number of smaller peaks until most of them were quarried away, leaving a sole remaining large peak. Te Tātua-a-Riukiuta was probably the most complex volcano in the Auckland volcanic field, consisting of five significant scoria cones and about a dozen smaller scoria mounds, sitting inside a large explosion crater. Along the edge of this crater to the south runs Mount Albert Road, and to the north, Landscape Road. At across

neg: Wizard Island the island. Wizard Island Wizard Island is a volcanic cinder cone which forms an island at the west end of Crater Lake in Crater Lake National Park, Oregon. The top of the island reaches above sea level, about above the average surface of the lake. The cone is capped by a volcanic crater about wide and deep. The crater was named the "Witches Cauldron" by William Gladstone Steel in 1885, who also gave Wizard Island its name at the same time. The land area of the island is . Wizard Island was created after Mount Mazama, a large complex volcano,

neg: Hallasan volcanic crater over in diameter tops the volcano. About 360 parasitic cones, or "oreum" (오름) in the Jeju dialect, are found on the volcano's flanks. Most of them are cinder cones and scoria cones, but there are also some lava domes and about 20 tuff rings near the coast and offshore, which were formed by underwater phreatic eruptions. The most recent eruptions are estimated to be about 5,000 years ago, which puts the volcano into the active classification, meaning it has erupted in the last 10,000 years. The designation as active is not agreed to by all, as more monitoring

neg: Pilanesberg at the perimeter of the crater formation. The name "Pilanes" comes from a historic Tswana chief named Pilane. Although geographically located within the Witwatersrand range, the mountain is geologically part of a feature known as the "Pilanesberg Alkaline Ring Complex". It is a vast ring dike of a very ancient extinct volcano that last erupted some 1,200 million years ago. The Pilanesberg is one of the largest volcanic complexes of its type, there are few similar alkaline volcanic structures in the world. Different types of syenites, including a number of rare minerals, occur in the crater area. The formation of

neg: Taal Volcano of sulfur was perceptible at the volcano, which came from the gases that escape from the crater. Great changes took place in the crater after the eruption. Before 1911, the crater floor was higher than Taal lake and had several separate openings in which were lakes of different colors. There was a green lake, a yellow lake, a red lake and some holes filled with hot water from which steam issued. Many places were covered with a shaky crust of volcanic material, full of crevices, which was always hot and on which it was rather dangerous to walk. Immediately after

neg: Mount Rainier twentieth century: Lassen in 1915 and St. Helens in 1980 and 2004. However, past eruptions in this volcanic arc have multiple examples of sub-plinian eruptions or higher: Crater Lake's last eruption as Mount Mazama was large enough to cause its cone to collapse, and Mt. Rainier's closest neighbor, Mount St. Helens, produced the largest eruption in the continental United States when it erupted in 1980. Statistics place the likelihood of a major eruption in the Cascade Range at 2-3 per century. Mount Rainier is currently listed as a Decade Volcano, or one of the 16 volcanoes with the greatest likelihood

neg: Haleakalā rift zones one of the longest in the Hawaiian Islands chain. Until recently, East Maui Volcano was thought to have last erupted around 1790, based largely on comparisons of maps made during the voyages of La Perouse and George Vancouver. Recent advanced dating tests, however, have shown that the last eruption was more likely to have been in the 17th century. These last flows from the southwest rift zone of Haleakalā make up the large lava deposits of the Ahihi Kina`u/La Perouse Bay area of South Maui. Contrary to popular belief, Haleakalā "crater" is not volcanic in origin, nor can

neg: Aguas Calientes (volcano) altitude is found on the northern flank. It extends down to the valley north of Aguas Calientes and intersects the youngest lavas of the volcano. The volcano has a well formed summit crater. A small crater lake is found within the Aguas Calientes summit crater, making it one of the highest lakes in the world at an altitude of . The lake has a surface area of and is tinged red from a population of microorganisms. The lake water is acidic and is frequently influenced by activity from Lascar, with winds carrying sulfuric acid and water vapour clouds to the

neg: Crater lake changes in environmental conditions over time, the occurrence of such floods is common to all natural dam types. A well-known crater lake, which bears the same name as the geological feature, is Crater Lake in Oregon. It is located in the caldera of Mount Mazama. It is the deepest lake in the United States with a depth of . Crater Lake is fed solely by falling rain and snow, with no inflow or outflow at the surface, and hence is one of the clearest lakes in the world. The highest volcano in the world, 6,893-m (22,615-ft) Ojos del Salado in

neg: Pink and White Terraces in search of a presumed "falling star" following reports of glowing and smoke from an area behind Wahanga. <br>In 1884, a surveyor named Charles Clayton described the top of Wahanga dome as volcanic with several depressions, one being approximately . On 10 June 1886, Mount Tarawera erupted. The eruption spread from west of Wahanga dome, to the north, down to Lake Rotomahana. The volcano belched out hot mud, red hot boulders, and immense clouds of black ash from a rift that crossed the mountain, passed through the lake, and extended beyond into the Waimangu valley. After the eruption, a crater

neg: The Volcano (British Columbia) The Volcano being one of the three having erupted in the last few hundred years. Tseax Cone, which last erupted in the 18th century, is the southernmost volcano in the province, while Prindle Volcano in easternmost-central Alaska, which erupted more than 10,000 years ago, is generally considered the northernmost. At least two phases of volcanic activity have been identified at The Volcano. Each event was followed by the eruption of lengthy basaltic lava flows that flowed down steep granitic flanks of the mountain ridge on which The Volcano lies. After this took place, they travelled through the Lava Fork valley

neg: Quilotoa Quilotoa Quilotoa () is a water-filled caldera and the most western volcano in the Ecuadorian Andes. The -wide caldera was formed by the collapse of this dacite volcano following a catastrophic VEI-6 eruption about 600 years ago, which produced pyroclastic flows and lahars that reached the Pacific Ocean, and spread an airborne deposit of volcanic ash throughout the northern Andes. This last eruption followed a dormancy period of 14,000 years and is known as the 1280 Plinian eruption. The fourth (of seven) eruptive phase was phreatomagmatic, indicating that a Crater lake was already present at that time. The caldera has

neg: Kunlun Volcanic Group of With a summit height of and a height of above base, Dahei Shan volcano is the highest volcano at Ashikule and features a V-shaped crater. high Wuluke cone north of Wukule lake features a crater lake. Migong Shan is east of Wuluke volcano. Yueya Shan has a high secondary cone within its wide crater; Maoniu Shan volcano is located nearby and they are surrounded by even smaller centres. Heilong Shan is a long volcanic ridge on the terraces of the Akesu River and to the east of it is the horseshoe-shaped Mati Shan and the high Dong Shan. The