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Ugashik-Peulik volcano

Stratovolcano 1474 m / 4,836 ft
United States, Alaska Peninsula, 57.75°N / -156.37°W
Current status: dormant (1 out of 5)
Ugashik-Peulik volcano books
Typical eruption style: unspecified
Ugashik-Peulik volcano eruptions: 1814 
TimeMag. / DepthDistanceLocation
Thu, 12 Oct
Thu, 12 Oct 05:51 UTCM 3.8 / 120.8 km17 km- 99km S of King Salmon, Alaska
Mon, 9 Oct
Mon, 9 Oct 10:27 UTCM 2.6 / 123.1 km11 km- 100km SSE of King Salmon, Alaska
Tue, 3 Oct
Tue, 3 Oct 11:46 UTCM 1.9 / 10.4 km18 km- 92km SSE of King Salmon, Alaska
Sun, 24 Sep
Sun, 24 Sep 04:51 UTCM 2.7 / 0.6 km13 km- 115km SSE of King Salmon, Alaska
Sat, 23 Sep
Sat, 23 Sep 10:15 UTCM 2.1 / 124.4 km12 km- 97km SSE of King Salmon, Alaska
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Background:

The Ugashik-Peulik volcanic complex lies south of Becharof Lake and east of Upper Ugashik Lake. Late-Pleistocene caldera formation at Ugashik volcano was followed by the emplacement of at least 5 Holocene lava domes within the 4.5-km-wide caldera. Most of the caldera walls consist of basement sandstones of Jurassic age. Following caldera formation the small, 3 cu km Peulik stratovolcano grew 2.5 km to the north to a height of 1474 m, more than 500 m above that of Ugashik. Lava flows from Peulik cover the caldera rim to the south and extend to Becharof Lake, 6 km to the north. A small lava dome at 1200 m elevation on the east flank of Peulik was the source of a small block-and-ash flow. The summit of Peulik volcano contains a 1.5-km-wide crater breached to the west that is partially filled by a lava dome. Debris-avalanche deposits cover a 75 sq km area to the NW. A single documented historical eruption took place from Peulik volcano in 1814.
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Smithsonian / GVP volcano information


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