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Pavlof Sister Volcano

Updated: Jul 24, 2024 20:44 GMT -
Stratovolcano 2142 m / 7,027 ft
United States, Alaska Peninsula, 55.45°N / -161.84°W
Current status: normal or dormant (1 out of 5)

[smaller] [larger]
Typical eruption style: unspecified
Pavlof Sister volcano eruptions: unknown, no recent eruptions

Latest nearby earthquakes

TimeMag. / DepthDistance / Location
Jul 20, 07:21 am (Anchorage)
0.5

9.1 km
10.3 km (6.4 mi) to the E 60 km NE of King Cove, Alaska Info
Friday, July 19, 2024 GMT (1 quake)
Jul 19, 08:28 am (Anchorage)
0.7

29 km
13 km (8 mi) to the SW 40 km NE of King Cove, Alaska Info
Wednesday, July 17, 2024 GMT (1 quake)
Jul 17, 05:38 pm (Universal Time)
0.6

33 km
8.6 km (5.4 mi) to the S 44 km NE of King Cove, Alaska Info

Background

Located at the end of a chain of volcanoes trending NE from Emmons Lake caldera, the symmetrical Pavlof Sister stratovolcano is somewhat more eroded than its twin volcano to the SW, Pavlof. Pavlof Sister, along with Pavlof and Little Pavlof is a stratovolcano that formed outside of the Emmons Lake caldera; these and other volcanoes inside Emmons Lake caldera are not glaciated and thus would have formed since the area was last glaciated about 15-20,000 years ago. The 2142-m-high Pavlof Sister is almost 400 m lower than Pavlof and has a sharper-peaked summit. Some sources attributed a period of intermittent eruptive activity from 1762 to 1786 AD to Pavlof Sister, but other sources consider this event to have been from Pavlof volcano. The two symmetrical volcanoes form a dramatic backdrop to Pavlof Bay and Volcano Bay near the western end of the Alaska Peninsula.
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Smithsonian / GVP volcano information

Latest satellite images

pavlofsister satellite image sat1pavlofsister satellite image sat2
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