Ugashik-Peulik volcano

Stratovolcano 1474 m / 4,836 ft
United States, Alaska Peninsula, 57.75°N / -156.37°W
Current status: normal or dormant (1 out of 5)

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Typical eruption style: unspecified
Ugashik-Peulik volcano eruptions: 1814 

Latest nearby earthquakes

TimeMag. / DepthDistance/Location
Mon, 21 Jun 2021 (GMT) (1 earthquake)
21 Jun 2021 00:02:15 GMT
1.2

18 km
33 km (21 mi)
Alaska Peninsula
Sun, 20 Jun 2021 (GMT) (1 earthquake)
20 Jun 2021 21:24:26 GMT
1.7

13 km
33 km (21 mi)
91 Km ESE of Egegik, Alaska
Fri, 11 Jun 2021 (GMT) (3 earthquakes)
11 Jun 2021 13:21:24 GMT
1.5

35 km
47 km (29 mi)
71 Km W of Karluk, Alaska
11 Jun 2021 06:52:58 GMT
1.5

3.2 km
35 km (22 mi)
68 Km SW of Karluk, Alaska
11 Jun 2021 04:16:26 GMT
1.8

17 km
34 km (21 mi)
88 Km WNW of Karluk, Alaska

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


See also: Sentinel hub | Landsat 8
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