Volcano news: Karymsky

Karymsky volcano (Kamchatka): elevated activity, frequent explosions

Sun, 10 Mar 2019, 18:12
18:12 PM | BY: T
Satellite image of Karymsky showing the ash deposit east of the volcano as gray layer
Satellite image of Karymsky showing the ash deposit east of the volcano as gray layer
The volcano remains in a state of elevated activity. Several strong explosions have occurred during the past days, producing ash plumes that rose up to 3-4 km above the volcano, as VAAC Tokyo frequently reports.
Most ash is drifting east, generating a dark blanket on the snow-clad landscape until the coast. If conditions allow, we will try to visit the volcano next week during our volcano special tour to Kamchatka.
In addition to the observations of ash plumes, several earthquakes of magnitudes above 4 have been recorded near the volcano recently, the latest a mag 4.4 event on Friday morning.

Previous news

Background:

Karymsky, the most active volcano of  Kamchatka's eastern volcanic zone, is a symmetrical stratovolcano constructed within a 5-km-wide caldera that formed during the early Holocene.  The caldera cuts the south side of the Pleistocene Dvor volcano and is located outside the north margin of the large mid-Pleistocene Polovinka caldera, which contains the smaller Akademia Nauk and Odnoboky calderas. 
Most seismicity preceding Karymsky eruptions originated beneath Akademia Nauk caldera, which is located immediately south of Karymsky volcano.  The caldera enclosing Karymsky volcano formed about 7600-7700 radiocarbon years ago; construction of the Karymsky stratovolcano began about 2000 years later.  The latest eruptive period began about 500 years ago, following a 2300-year quiescence.  Much of the cone is mantled by lava flows less than 200 years old.  Historical eruptions have been vulcanian or vulcanian-strombolian with moderate explosive activity and occasional lava flows from the summit crater.


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Source: GVP, Smithsonian Institution


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