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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
Sat, 12 Aug
Sat, 12 Aug 06:04 UTCM 2.5 / 125.3 km18 km- 120km S of King Salmon, Alaska
Mon, 31 Jul
Mon, 31 Jul 11:00 UTCM 2.6 / 132.3 km7 km- 99km S of King Salmon, Alaska
Wed, 26 Jul
Wed, 26 Jul 10:45 UTCM 3.3 / 92.1 km32 km- 113km W of Larsen Bay, Alaska
Sat, 15 Jul
Sat, 15 Jul 09:38 UTCM 2.2 / 114.5 km16 km- 120km S of King Salmon, Alaska
View all recent quakes

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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