Kamchatkan and Northern Kuriles
Volcanic Activity
KVERT INFORMATION RELEASE 14-07
Friday, May 04, 2007,
11:00 KDT (May 02, 22:00 UTC)
SUMMARY OF LEVEL OF CONCERN
COLOR CODES:
KAMCHATKA:
SHEVELUCH, KLYUCHEVSKOY and KARYMSKY:
ORANGE
BEZYMIANNY:
YELLOW
TOLBACHIK PLOSKY, KIZIMEN, AVACHINSKY, KORYAKSKY,
MUTNOVSKY and GORELY: GREEN
NORTHERN KURILE:
CHIKURACHKI: YELLOWEBEKO and ALAID: GREEN
SHEVELUCH VOLCANO: 56œ38'N, 161œ19'E;
Elevation 3,283 m, the dome elevation ~2,500 m.
CURRENT LEVEL OF CONCERN
COLOR CODE IS ORANGE
Growth
of the lava dome continues. A hot lava extrudes at the top of the dome. Ash
explosions up to 10 km (32,800 ft.) ASL could occur at any time. The activity of
the volcano could affect international and local aircraft.
Seismic
activity was above background levels, a lot of shallow volcanic earthquakes and
volcanic tremor were registered. According to seismic data, probably ash plumes
up to 7.0-10.0 km (23,000-33,000 ft) ASL occurred at the volcano on May 02-03.
Also probably ash plumes rose up to 4.0-6.5 km (13,300-21,700 ft) ASL at the
volcano all week. According to visual and video data, hot avalanches from a top
of the dome were noted on April 30. Ash plumes rose up to 4.0 km (13,300 ft) ASL
this day. Gas-steam activity of the volcano observed on April 29 and May 01.
According to satellite data, ash plumes extended about 60 km (38 mi) mainly to
the south and south-west from the volcano on April 28-29. A big thermal anomaly
was noted all week.
KLYUCHEVSKOY
VOLCANO; 56œ03'N, 160œ39'E; Elevation 4,750 m
CURRENT LEVEL OF CONCERN COLOR
CODE IS ORANGE
Explosive-effusive
eruption of the volcano continues. Ash explosions up to 10 km (32,800 ft.) ASL
could occur at any time. The activity of the volcano could affect international
and low-flying aircraft.
Seismicity was above background levels
last week: volcanic earthquakes and a volcanic tremor were registered. According
to video data and visual observations, Strombolian activity at the volcanic
crater was observed last week. Lava flows and mud flows moved downslope on the
north western flank of the volcano. Phreatic bursts and ash plumes were observed
on the front of the lava flows. Gas-steam plumes containing ash rose up to 6.2
km (20,400 ft) ASL last week. According to satellite data, ash plumes extended
about 80 km (50 mi) mainly to the south and south-east from the volcano this
week. A large thermal anomaly over the volcanic crater was noted all
days.
KARYMSKY VOLCANO: 54œ03'N,
159œ27'E; Elevation 1,486 m.
CURRENT LEVEL OF CONCERN COLOR CODE IS ORANGE
An
eruption of the volcano continues. Ash explosions up to 6 km (or 19,700 ft.) ASL
are possible at any time. The activity of the volcano could affect low-flying
aircraft in the vicinity of the volcano. Seismic activity was at background
levels last week. According to satellite data, no ash plumes and thermal anomaly
were noted at the area of the volcano.
BEZYMIANNY VOLCANO: 55œ58'N, 160œ36'E; Elevation 2,895 m
CURRENT LEVEL
OF CONCERN COLOR CODE IS YELLOW
Growth of the lava dome continues. The activity of
the volcano could affect low-flying aircraft in the vicinity of the
volcano.
Strong seismicity at nearby Klyuchevskoy volcano makes it
difficult to determine seismicity at Bezymianny, and KB GS RAS' staff is unable
to accurately determine the state of the volcano from 15 April. According to
visual and video data, gas-steam plumes rose up to 3.5 km (11,500 ft) ASL and
extended to the south-east from the volcano on April 29-30 and May 01 and 03.
Clouds obscured the volcano in the other days. According to satellite data, a
thermal anomaly over the lava dome was noted on April
29.
CHIKURACHKI VOLCANO 50œ19'N,
155œ28'E; Elevation 1,816 m
CURRENT LEVEL OF CONCERN COLOR CODE IS YELLOW
Eruptive activity of the volcano was noted on April
18 last time. Chikurachki volcano is not monitored with seismic instruments.
KVERT has satellite monitoring and receives occasional visual observations of
this volcano. No eruption activity of this volcano was noted last week.
IF YOU HAVE ANY QUESTIONS OR CONCERNS, PLEASE
CONTACT:
Olga Girina, KVERT, IVS FED
RAS
E-mail: girina@kscnet.ruTel. (41522) 58627
Tatiana Kozhevnikova, KVERT, KB
GS RAS
E-mail: ssl@emsd.iks.ruTel. (41522) 59523
Tom Murray, Scientist-in-Charge,
AVO
E-mail: tlmurray@usgs.govTel. 907-786-7497
The Kamchatkan Volcanic
Eruption Response Team (KVERT) is a non-commercial cooperative program of the
Alaska Volcano Observatory (AVO, USA), the Institute of Volcanology and
Seismology (IVS) FED RAS and the Kamchatkan Branch of Geophysical Survey (KB GS)
RAS (Russia). KVERT staff is available in the office from 8:30 AM till 6:00 PM
(KST or KDT) and by phone during the evenings. KVERT uses daily satellite
imagery, information from remote scientific observation stations, real-time
seismic data for 10 volcanoes, and other information to monitor activity at
Kamchatkan and Northern Kuriles Volcanoes.
The official web-page of
KVERT (the Institute of Volcanology and Seismology FED RAS): http://www.kscnet.ru/ivs/kvert/index.htmlArchive of daily information KB GS RAS: ftp://emsd.iks.ru/pub/DATA/RTS/VolcanoesKVERT Information Releases at the web-page of AVO (Alaska
Volcano Observatory): http://www.avo.alaska.edu/activity/avoreport.php?view=kaminfo