Today’s featured volcano is one of Kamchatka’s largest and most active volcanic centers. It has been active recently, throwing out ash and oozing out some lava. This volcano is a favorite for geologists and archaeological types in Kamchatka- its frequent, widespread ashfalls create nice time markers.
(Also Shiveluch or in Russian: Шивелуч)
Sheveluch at a Glance:
|Located:||Central Kamchatka Peninsula, Russia|
|Volcano Type:||Stratovolcano (both ash and lava eruptions)|
|Summit Elevation:||3283 m (10, 771 feet)|
|Last Known Eruption:||2011 (continuing since 1999)|
Most Recent Activity (Week of November 4-11, 2011): Moderate seismic activity was detected at Shiveluch during 4-11 November, and indicated that possible ash plumes rose to a maximum altitude of 4.5 km (14,800 ft) a.s.l. Ground-based observers noted that a viscous lava flow continued to effuse in the crater formed during a 2010 eruption. Strong fumarolic activity at the lava dome was observed during 2-3 and 5-9 November; cloud cover prevented observations on the other days. Satellite imagery showed a daily thermal anomaly over the lava dome and gas-and-steam plumes containing small amounts of ash that drifted 25 km E on 5 November.
Historic large plinian eruptions:
1964 Eruption included a large-scale slope failure, small phreatic explosion and a powerful plinian eruption resulting in pyroclastic fall and flows accompanied by mudflows (lahars). A 1.5 x 3 km explosion crater was formed during this eruption.
1854 Large eruption with explosivity index of 5
Geologic History: Shiveluch is a massif – a complex pile of overlapping stratocones, domes, lava fields and craters. It has a history of large flank failures. Recent Shiveluch activity includes the two large plinian eruptions above, and more than 10 moderate dome-associated events, which produced minor pyroclastic flows and ashfalls. The last eruption of this kind in May 2001 caused 30-km long lahars. Due to its frequent and large explosive eruptions, Shiveluch poses a hazard not only to the nearby towns of Kliuchi and Ust’-Kamchatsk, but also for aviation pathways between the USA and all of the Far East.
Info from KVERT and the Smithsonian Global Volcanism Network.