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Snowy Mountain volcano

Stratovolcanoes 2162 m / 7,093 ft
United States, Alaska Peninsula, 58.34°N / -154.68°W
Current status: normal or dormant (1 out of 5) | Reports
Snowy Mountain volcano books
Typical eruption style: unspecified
Snowy Mountain volcano eruptions: 1710 ± 200 years
TimeMag. / DepthDistanceLocation
Sun, 16 Dec
Sun, 16 Dec 10:16 UTCM 2.2 / 12.6 km4 km- 100km NNW of Larsen Bay, Alaska
Thu, 13 Dec
Thu, 13 Dec 18:11 UTCM 0.5 / 4.9 km8 km- 108km NNW of Larsen Bay, Alaska
Tue, 11 Dec
Tue, 11 Dec 09:25 UTCM 2.1 / 75.3 km29 km- 75km N of Larsen Bay, Alaska
Fri, 7 Dec
Fri, 7 Dec 08:21 UTCM 2.5 / 105.2 km24 km- 122km E of King Salmon, Alaska
Tue, 4 Dec
Tue, 4 Dec 17:29 UTCM 1.1 / 1.4 km2 km- 97km SE of King Salmon, Alaska
View all recent quakes

Background:

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


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