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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: dormant (1 out of 5)
Snowy Mountain volcano books
Typical eruption style: unspecified
Snowy Mountain volcano eruptions: 1710 ± 200 years
TimeMag. / DepthDistanceLocation
Tue, 25 Jul
Tue, 25 Jul 03:35 UTCM 1.5 / 2 km28 km- Alaska Peninsula
Wed, 19 Jul
Wed, 19 Jul 08:00 UTCM 1.71 km- Alaska Peninsula
Tue, 18 Jul
Tue, 18 Jul 17:19 UTCM 0.4 / 6.5 km7 km- 95km NW of Larsen Bay, Alaska
Sun, 16 Jul
Sun, 16 Jul 06:12 UTCM 2.4 / 107.5 km2 km- 96km ESE of King Salmon, Alaska
Sun, 16 Jul 03:18 UTCM 1.33 km- 95km 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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