Kamchatkan and Northern Kuriles
Volcanic Activity
KVERT INFORMATION RELEASE 35-07
Friday, July 20,
2007, 21:40 UTC (July 19, 10:40 KDT)
SUMMARY OF LEVEL OF
CONCERN COLOR CODES:
KAMCHATKA:
SHEVELUCH and KARYMSKY: ORANGE
KLYUCHEVSKOY
and BEZYMIANNY : YELLOW
TOLBACHIK
PLOSKY, KIZIMEN, AVACHINSKY, KORYAKSKY, MUTNOVSKY and GORELY: GREEN
NORTHERN KURILES:
CHIKURACHKI, EBEKO
and ALAID: GREEN
CURRENT
CHANGES IN COLOR CODE:
KLYUCHEVSKOY IS NOW AT LEVEL OF CONCERN COLOR
CODE YELLOW
KLYUCHEVSKOY
VOLCANO; 56œ03'N, 160œ39'E; Elevation 4,750 m
CURRENT LEVEL OF CONCERN
COLOR CODE IS YELLOW
PREVIOUS
LEVEL OF CONCERN COLOR CODE IS ORANGE
Activity
of Klyuchevskoy has decreased and KVERT is now assigning level of concern color
code YELLOW to the volcano: seismic
activity was at background levels during
the past weak, and ash plumes were not noted for the last four days .
Still, sudden ash
explosions up to 6 km (19,700 ft.) ASL could affect
international and low-flying aircraft.
Seismic activity was at background
levels last week, weak continuous spasmodic volcanic tremor and a few
shallow earthquakes were
registered. According to video and visual
data, ash plumes extended to the east and south-east at a height of 5.5 km
(18,040 ft)
ASL on July 13-15. Gas-steam activity was noted on July 12, 16
and 18 and the volcano was obscured by clouds on the other days.
According
to satellite data, ash plumes extended for about 37-86 km (23-53 mi) to the east
from the volcano on July 13. Thermal
anomaly was noted all
days.
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. 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.
Seismic activity remains above background
levels. Many shallow volcanic earthquakes and volcanic tremor were
registered. According
to seismic data, ash plumes up to 6.0 km (19700 ft)
ASL occurred at the volcano last week. Gas-steam plumes up to 3.0-4.5 km
(9,800-14,700 ft) ASL, containing some amount of ash, and avalanches were
observed on July 11-15 and 18-19. Clouds obscured the
volcano in other days.
According to satellite data, gas-steam and ash plumes extended for about 7-40 km
(4-25 mi) to the south and
south-west from the volcano on July 15-16, a big
thermal anomaly was noted all week.
KARYMSKY VOLCANO: 54œ03'N, 159œ27'E;
Elevation 1,486 m.
CURRENT LEVEL OF CONCERN COLOR CODE IS ORANGE
The
eruption of the volcano continues. Seismic activity has increased. 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 above background levels all week, 500-900
shallow volcanic earthquakes and a spasmodic volcanic tremor were
registered
at volcano all days. According to seismic data, possibly ash explosions rose up
to 4.5 km (14800 ft) ASL all weak.
According to satellite data, thermal
anomaly was noted on July 12, 14, 16-18, ash plumes and ash clouds extended up
to 75 km (47 mi)
to the south-east and south-west from the volcano on July
15, 17-18. Approximate plume altitude: 4500 m (14,700 ft) ASL (by
atmospheric profile)
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.
Seismic activity was above
background levels on July 15-17, did not exceed background levels on the other
days. About 20 shallow
volcanic earthquakes were registered during the weak.
According to visual information weak fumarolic activity was observed on July
14-15 and 18. According to satellite data a thermal anomaly was noted on
July 14, 16-18, clouds obscured the volcano all days.
IF YOU HAVE ANY
QUESTIONS OR CONCERNS, PLEASE CONTACT:
Nataliya Malik, KVERT, IVS
FED RAS
E-mail: malik@kcsnet.ruTel.
(41522) 58627
9622826547
Tat'yana
Kozevnikova, 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