Volcano news: Karymsky
Karymsky volcano Volcanic Ash Advisory: 20180922/1540Z ERUPTION
FVAK22 at 05:30 UTC, 23/09/18 from PAWU
VOLCANO: KARYMSKY 300130
PSN: N5403 E15927
AREA: KAMCHATKA PENINSULA
SUMMIT ELEV: 5039 FT [1536 M]
ADVISORY NR: 2018/016
INFO SOURCE: HIMAWARI
AVIATION COLOR CODE: ORANGE
ERUPTION DETAILS: 20180922/1540Z ERUPTION
OBS VA DTG: 23/0525Z
OBS VA CLD: VA NOT IDENTIFIABLE FROM SATELLITE
FCST VA CLD +6HR: NO VA EXP
FCST VA CLD +12HR: NO VA EXP
FCST VA CLD +18HR: NO VA EXP
RMK: VAAC TOKYO HAS TRANSFERRED RESPONSIBILITY OF THIS EVENT
TO VAAC ANCHORAGE. THIS ADVISORY UPDATES MESSAGE FVFE01 RJTD.
NXT ADVISORY: NO FURTHER ADVISORIES
DH SEP 2018 AAWU
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