Karymsky volcano (Kamchatka): increasing activity

So, 23. Jul 2017, 16:36
16:36 PM | VON: T
Ash eruption from Karymsky on 18 July 2017 (photo: Andrey Nikiforov)
Ash eruption from Karymsky on 18 July 2017 (photo: Andrey Nikiforov)
The volcano has gradually become more active, our Kamchatka volcano correspondent Andrey reported. He flew over the volcano a few days ago and witnessed one of the now frequent strombolian- to vulcanian-type explosions.
Ash plumes sometimes rise up to 2-3 km and are large enough to be recorded on satellite data as well, as VAAC Tokyo reports.
Great News for our upcoming Kamchatka volcano expedition!

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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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