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Novarupta [a] is a volcano that was formed in 1912, located on the Alaska Peninsula on a slope of Trident Volcano in Katmai National Park and Preserve, about 290 miles (470 km) southwest of Anchorage. Formed during the largest volcanic eruption of the 20th century, Novarupta released 30 times the volume of magma of the 1980 eruption of Mount St ...
Map showing volcanoes of Alaska Peninsula. Katmai caldera before and after surveys of 1908 and 1951. Mount Katmai is one of five vents encircling the Novarupta volcano, source of the VEI 6 eruption and associated voluminous pyroclastic flows in 1912. Katmai consists chiefly of lava flows, pyroclastic rocks, and non-welded to agglutinated air fall.
The 1989 eruption is also notable for being the first ever volcanic eruption to be successfully predicted by the method of long-period seismic events developed by Swiss/American volcanologist Bernard Chouet. [7] As of August 2015, the Alaska Volcano Observatory has rated Redoubt as Aviation Alert Level Green and Volcano Alert Level Normal. [3]
Name Elevation Location Last eruption meters feet Coordinates; Mount Adagdak: 645: 2115: 210,000 ± 5,000 years ago Mount Akutan: 1303: 4275: 1996 Alagogshak: 1675
Alaska's Mount Redoubt volcano began erupting on March 22, 2009, and activity continued for several months. During the eruptions, reports found ash clouds reaching as high as 65,000 feet (20,000 m) above sea level. [1] In response, the National Weather Service issued a series of ash fall advisories.
Not one but two volcanoes on the same island in Alaska’s Aleutian chain were rocked by earthquakes on Friday, prompting concerns about a possible eruption. Elevated earthquake activity was ...
Aniakchak is one of the most active volcanoes in Alaska and underwent several significant caldera-forming eruptions. The largest eruption is known as Aniakchak II and took place in 1628/1627 BCE . During this eruption, pyroclastic flows swept all the flanks of the volcano and caused a tsunami in Bristol Bay .
in Category:Volcanoes of Alaska by borough. It should hold all the pages in the borough-level categories, and may hold other pages such as lists.