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Snowy Mountain volcan

Stratovolcanoes 2162 m / 7,093 ft
United States, Alaska Peninsula, 58.34°N / -154.68°W
Condition actuelle: normal / en sommeil (1 sur 5) | Reports
Snowy Mountain livres
Style éruptif tipique: unspecified
Eruptions du volcan Snowy Mountain: 1710 ± 200 years
HeureMag. / DepthDistanceLocation
Sat, 30 Nov 2019
Sat, 30 Nov 09:38 UTCM 1.7 / 5.8 km12 km110km NNW of Larsen Bay, Alaska (USA)
Thu, 28 Nov 2019
Thu, 28 Nov 23:21 UTCM 0.7 / 2.7 km11 km108km NNW of Larsen Bay, Alaska (USA)
Mon, 11 Nov 2019
Mon, 11 Nov 04:22 UTCM 1.33 km100km NNW of Larsen Bay, Alaska (USA)

Introduction:

Glacier-covered, 2161-m-high Snowy Mountain, located 15 km NE of Mount Katmai, is the SW-most of a chain of closely spaced volcanoes extending NE along the crest of the Alaska Range. More than 90% of the compound Snowy volcano is mantled by glacial ice, which prompted the naming of the volcano by members of the 1917 Katmai expedition. Two small andesitic-dacitic stratovolcanoes, SW Snowy and NE Snowy, originated about 200,000 years ago. Only NE Snowy has been active during the Holocene. Late-Holocene collapse of this volcano produced a large debris avalanche that traveled to the north and left a large breached crater inside which a blocky lava dome was constructed. Peat beneath an ash layer thought to be associated with the the lava dome was radiocarbon dated at about 250 +/- 70 years ago. No historical eruptive activity has been documented, but fumarolic activity has been observed at NE Snowy. A zone of persistent diffuse shallow seismicity is located on and NW of the volcano.
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Smithsonian / GVP volcano information


Derniers images satellite


See also: Sentinel hub | Landsat 8
 

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