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Karymsky volcano Volcanic Ash Advisory: POSS ERUPTION OBS AT 20170626/1940Z FL200 EXTD S OBS VA DTG: 26/2000Z

Mo, 26. Jun 2017, 20:45
20:45 PM |
Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report:

FVFE01 at 20:30 UTC, 26/06/17 from RJTD
VA ADVISORY
DTG: 20170626/2030Z
VAAC: TOKYO
VOLCANO: KARYMSKY 300130
PSN: N5403 E15927
AREA: RUSSIA
SUMMIT ELEV: 1513M
ADVISORY NR: 2017/31
INFO SOURCE: HIMAWARI-8
AVIATION COLOUR CODE: NIL
ERUPTION DETAILS: POSS ERUPTION OBS AT 20170626/1940Z FL200 EXTD S
OBS VA DTG: 26/2000Z
OBS VA CLD: SFC/FL200 N5404 E15926 - N5413 E15929 - N5407 E15938 -
N5400 E15932 MOV S 10KT
FCST VA CLD +6 HR: 27/0200Z SFC/FL200 N5330 E16044 - N5301 E16035 -
N5252 E15930 - N5328 E15950 - N5351 E15918
FCST VA CLD +12 HR: 27/0800Z SFC/FL190 N5324 E16102 - N5220 E16207 -

N5156 E15935 - N5258 E16038 - N5401 E15928
FCST VA CLD +18 HR: 27/1400Z SFC/FL180 N5313 E16239 - N5125 E16317 -

N5107 E16005 - N5232 E16156 - N5409 E16009
RMK: T+0 CONFIDENCE HIGH.
NXT ADVISORY: 20170627/0000Z=

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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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