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)

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Typical eruption style: unspecified
Snowy Mountain volcano eruptions: 1710 ± 200 years

Latest nearby earthquakes

TimeMag. / DepthDistance/Location
Thu, 17 Jun 2021 (GMT) (2 earthquakes)
17 Jun 2021 18:30:19 GMT
0.7

1.5 km		32 km (20 mi)
96 Km E of King Salmon, Alaska
17 Jun 2021 08:32:11 GMT
0.6

4.2 km		34 km (21 mi)
94 Km E of King Salmon, Alaska
Wed, 16 Jun 2021 (GMT) (1 earthquake)
16 Jun 2021 01:49:55 GMT
0.1

2.5 km		44 km (27 mi)
87 Km NW of Karluk, Alaska
Mon, 14 Jun 2021 (GMT) (1 earthquake)
14 Jun 2021 11:26:41 GMT
0.6

5.7 km		14 km (8.7 mi)
94 Km N of Karluk, Alaska
Sun, 13 Jun 2021 (GMT) (1 earthquake)
13 Jun 2021 18:50:11 GMT
0.4

1 km		41 km (25 mi)
83 Km NW of Karluk, Alaska

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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