Karymsky Volcano Volcanic Ash Advisory: ERUPTION AT 20201209/2036Z FL230 REPORTED OBS VA DTG: 09/2200Z to 23000 ft (7000 m)

Wed, 9 Dec 2020, 22:45
22:45 PM | BY: VN
Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 23000 ft (7000 m) altitude or flight level 230 .
The full report is as follows:

FVFE01 at 22:42 UTC, 09/12/20 from RJTD
VA ADVISORY
DTG: 20201209/2242Z
VAAC: TOKYO
VOLCANO: KARYMSKY 300130
PSN: N5403 E15927
AREA: RUSSIA
SUMMIT ELEV: 1513M
ADVISORY NR: 2020/115
INFO SOURCE: HIMAWARI-8 KBGS
AVIATION COLOUR CODE: NIL
ERUPTION DETAILS: ERUPTION AT 20201209/2036Z FL230 REPORTED
OBS VA DTG: 09/2200Z
OBS VA CLD: SFC/FL230 N5402 E15925 - N5420 E15847 - N5452 E15845 -
N5453 E15910 - N5426 E15903 - N5414 E15930 - N5402 E15928 MOV NW
40KT
FCST VA CLD +6 HR: 10/0400Z SFC/FL240 N5211 E16100 - N5305 E15811 -
N5730 E15706 - N5746 E15746
FCST VA CLD +12 HR: 10/1000Z SFC/FL240 N4933 E16446 - N5049 E15947 -

N5300 E15709 - N6134 E15512 - N6254 E15614 - N5357 E15933
FCST VA CLD +18 HR: NO VA EXP
RMK: VA HEIGHT UPDATED TO FL230 BASED ON GROUND REPORT. SOME PART
OF
VA OBSCURED BY MET CLOUD.
NXT ADVISORY: 20201210/0000Z=

Previous news

Wed, 9 Dec 2020, 06:00
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. ... Read all
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
Show more

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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