Volcano news: Karymsky
Karymsky volcano Volcanic Ash Advisory: POSS ERUPTION OBS AT 20170731/2100Z FL090 EXTD NE OBS VA DTG: 31/2120Z
FVFE01 at 21:57 UTC, 31/07/17 from RJTD
VOLCANO: KARYMSKY 300130
PSN: N5403 E15927
SUMMIT ELEV: 1513M
ADVISORY NR: 2017/76
INFO SOURCE: HIMAWARI-8
AVIATION COLOUR CODE: NIL
ERUPTION DETAILS: POSS ERUPTION OBS AT 20170731/2100Z FL090 EXTD NE
OBS VA DTG: 31/2120Z
OBS VA CLD: SFC/FL090 N5404 E15927 - N5413 E15936 - N5411 E15947 -
N5402 E15927 MOV NE 10KT
FCST VA CLD +6 HR: 01/0320Z SFC/FL100 N5441 E16145 - N5342 E15942 -
N5345 E15920 - N5445 E16123
FCST VA CLD +12 HR: 01/0920Z SFC/FL100 N5505 E16314 - N5320 E15924 -
N5337 E15853 - N5428 E16044 - N5506 E16241
FCST VA CLD +18 HR: 01/1520Z SFC/FL090 N5525 E16351 - N5400 E16115 -
N5304 E15838 - N5338 E15819 - N5329 E15904
RMK: T+0 CONFIDENCE HIGH.
NXT ADVISORY: 20170801/0000Z=
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.
Source: GVP, Smithsonian Institution