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Karymsky volcano (Eastern Kamchatka, Russia) - Smithsonian / USGS Weekly Volcanic Activity Report for 9 December-15 December 2020 (New Activity / Unrest)

Wed, 9 Dec 2020, 06:00
06:00 AM | BY: VN
At 2045 on 9 December explosions at Karymsky generated ash plumes that rose 6-7 km (19,700-23,000 ft) a.s.l. and drifted 60 km NW, prompting KVERT to raise the Alert Level to Orange (the second highest level on a four-color scale). Explosions continued the next day; ash plumes drifted 220 km NW, W, and SW.
A thermal anomaly was identified in satellite images on 4, 8, and 10 December.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
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From: Global Volcanism Program, 2020. Report on Karymsky. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 9 December-15 December 2020. Smithsonian Institution and US Geological Survey.

Previous news

Wed, 2 Dec 2020, 06:00
KVERT reported that strong explosions at Karymsky were last observed on 8 November 2019 and a thermal anomaly was last visible in satellite images on 19 November 2019. Gas-and-steam emissions persist. Since activity had significantly decreased, the Alert Level was lowered to Yellow (the second lowest level on a four-color scale) on 3 December. ... Read all
Wed, 18 Nov 2020, 06:00
KVERT reported that a thermal anomaly over Karymsky was identified in satellite images on 15 and 19 November. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). ... Read all
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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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