Karymsky volcano Volcanic Ash Advisory: POSS ERUPTION OBS AT 20170703/2300Z FL100 EXTD W OBS VA DTG: 03/2320Z

Вт, 4 июл 2017, 00:00
00:00 AM |
Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report:

FVFE01 at 23:58 UTC, 03/07/17 from RJTD
VA ADVISORY
DTG: 20170703/2358Z
VAAC: TOKYO
VOLCANO: KARYMSKY 300130
PSN: N5403 E15927
AREA: RUSSIA
SUMMIT ELEV: 1513M
ADVISORY NR: 2017/43
INFO SOURCE: HIMAWARI-8
AVIATION COLOUR CODE: NIL
ERUPTION DETAILS: POSS ERUPTION OBS AT 20170703/2300Z FL100 EXTD W
OBS VA DTG: 03/2320Z
OBS VA CLD: SFC/FL100 N5407 E15926 - N5408 E15910 - N5404 E15910 -
N5404 E15926 MOV W 5KT
FCST VA CLD +6 HR: 04/0520Z SFC/FL110 N5433 E15938 - N5403 E15930 -
N5402 E15914 - N5435 E15842
FCST VA CLD +12 HR: 04/1120Z SFC/FL120 N5413 E15945 - N5353 E15933 -

N5450 E15827 - N5515 E15841
FCST VA CLD +18 HR: 04/1720Z SFC/FL130 N5432 E15855 - N5352 E15903 -

N5427 E15722 - N5528 E15603
RMK: T+0 CONFIDENCE HIGH. VA OF PREVIOUS VAA DISSIPATED ON SATELLITE

IMAGERY. NEW VA OBS SATELLITE IMAGERY.
NXT ADVISORY: 20170704/0600Z=

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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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