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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
Tue, 16 Oct
Tue, 16 Oct 20:06 UTCM 0.4 / 4.7 km5 km- 100km ESE of King Salmon, Alaska
Tue, 16 Oct 14:01 UTCM 0.7 / 2.4 km3 km- 102km NW of Larsen Bay, Alaska
Tue, 16 Oct 03:42 UTCM 0.3 / 4.2 km2 km- 102km ESE of King Salmon, Alaska
Tue, 16 Oct 03:39 UTCM 0.4 / 4.8 km2 km- 100km NNW of Larsen Bay, Alaska
Sat, 13 Oct
Sat, 13 Oct 15:35 UTCM 1.7 / 59 km27 km- 74km NW of Larsen Bay, 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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