Ushkovsky

SUMMARY:

Type: compound
Activity: dormant
Last Eruption: 1890 AD
Rock Type: ?
Eruptive Volume: ? cu km
Location Map from Xerox PARC
Latitude: 56.23 N
Longitude: 160.48 E

GEOLOGIC HISTORY

Ushkovsky (formerly known as Plosky) is a large compound volcanic massif at the NW end of the Kliuchevskaya volcano group. It consists of the flat-topped Ushkovsky volcano (Daljny Plosky), which is capped by an ice-filled 4.5 x 5.5 km caldera, and the adjacent slightly higher peak of Krestovsky (Blizhny Plosky) volcano. Two glacier-clad cinder cones with large summit craters form a high point within the caldera. Linear zones of cinder cones are found on the SW and NE flanks and on lowlands to the W. The volcano has been active during the Holocene.

Historic Activity: The last eruption of the summit cone occurred in 1890.

Recent Activity: Series of earthquakes beginning in Sept. 1998.

Data Sources

• Smithsonian's SEAN Bulletin (V. 7, No. 3)
• Global Volcanism Network (V. 23, No. 11).

ADDITIONAL INFORMATION

• Link to Global Volcanism Network's Ushkovsky Information

Last Update: 2/21/00