Roundtop volcano
Updated: Feb 6, 2023 10:24 GMT -
Stratovolcano 1871 m / 6,138 ft
United States, Aleutian Islands, 54.8°N / -163.59°W
Current status: normal or dormant (1 out of 5)
United States, Aleutian Islands, 54.8°N / -163.59°W
Current status: normal or dormant (1 out of 5)
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Roundtop volcano eruptions: 7600 BC ± 500 years
Latest nearby earthquakes
| Time | Mag. / Depth | Distance/Location | ||
| Sunday, February 5, 2023 GMT (1 quake) | ||||
| Feb 4, 2023 11:46 pm (GMT -9) (Feb 5, 2023 08:46 GMT) | 2.0 36 km | 15 km (9.3 mi) 63 mi west of King Cove, Aleutians East, Alaska, USA | ||
| Monday, January 30, 2023 GMT (1 quake) | ||||
| Jan 29, 2023 3:21 pm (GMT -9) (Jan 30, 2023 00:21 GMT) | 2.2 9 km | 32 km (20 mi) Bering Sea, 51 mi southwest of King Cove, Aleutians East, Alaska, USA | ||
Background
The flat-topped, glacier-covered Roundtop volcano is the easternmost and lowest of an E-W-trending line of volcanoes on eastern Unimak Island. Roundtop lies 13 km SW of the village of False Pass. The snow and ice-covered edifice fills much of a 3-km-wide caldera that formed during the early Holocene. The caldera-forming eruption produced pyroclastic flows and a rhyolitic tephra layer that is widespread throughout the southwestern end of the Alaska Peninsula. A group of lava domes was constructed south of Roundtop volcano. No historical eruptions are known from the 1871-m-high stratovolcano. In the 1930s warm springs were found on its slopes.---
Smithsonian / GVP volcano information
Roundtop Photos
The chain of volcanoes on Unimak, from left to right: Roundtop Mountain, Isanotski, Pogromni and Shishaldin. (Photo: marcofulle)
See also: Sentinel hub | Landsat 8 | NASA FIRMS
