KVERT INFORMATION RELEASE 11-07

Friday, April 13, 2007, 10:40 KDT (April 12, 21:40 UTC)

SUMMARY OF LEVEL OF CONCERN COLOR CODES:

KAMCHATKA:

KARYMSKY, SHEVELUCH and KLYUCHEVSKOY: ORANGE
BEZYMIANNY: YELLOW
TOLBACHIK PLOSKY, KIZIMEN, AVACHINSKY, KORYAKSKY, MUTNOVSKY and GORELY: GREEN

NORTHERN KURILE:

CHIKURACHKI: ORANGE

EBEKO and ALAID: GREEN

SHEVELUCH VOLCANO: 56°38'N, 161°19'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 km (22,970 ft) ASL occurred at the volcano. According to visual and video data, gas-steam plumes possibly containing ash rose up to 4.5 km (14,760 ft) on April 10-12 . According to satellite data, ash plumes extended 30-103 km (19-64 mi) to the north, north-west, south-east and south-west from the volcano on April 10-12. A big thermal anomaly was noted on April 10-12.

KLYUCHEVSKOY VOLCANO; 56°03'N, 160°39'E; Elevation 4,750 m 

CURRENT LEVEL OF CONCERN COLOR CODE IS ORANGE.

Weak explosive-effusive eruption of the volcano continues. The activity of the volcano could affect international and low-flying aircraft.

Seismicity was above background levels last days: volcanic earthquakes and a volcanic tremor were registered. According to video data and visual observations, a lava flow on the north-western flank of the volcano and strombolian activity at the volcanic crater were observed. Gas-steam plumes, possibly containing small amount of ash rose up to 6.3 km (20,700 ft) ASL and extended to the east all days. A thermal anomaly over the volcanic crater was noted on April 10-12.

KARYMSKY VOLCANO: 54°03'N, 159°27'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. The activity of the volcano could affect low-flying aircraft in the vicinity of the volcano.

Seismic activity was above background levels. According to seismic data, weak local shallow earthquakes and possibly, ash explosions up to 4.0 km (13,100 ft) ASL occurred last days. 

BEZYMIANNY VOLCANO: 55°58'N, 160°36'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 did not exceed background levels these days. According to visual and video data, gas-steam plumes rose up to 3.6 km (11,800 ft) ASL and extended to the eastern directions from the volcano on April 11-12. According to satellite data, a thermal anomaly over the lava dome was noted on April 10-11.

CHIKURACHKI VOLCANO 50°19'N, 155°28'E; Elevation 1,816 m

CURRENT LEVEL OF CONCERN COLOR CODE IS ORANGE

Explosive eruption of the volcano continues. The activity of the volcano could affect low-flying aircraft.

Explosive activity of the volcano began on March 04. According to visual data, ashfall was noted at Severo-Kurilsk on April 04. An ash plume rose up to 3.0 km (9,800 ft) ASL on April 06: http://www.kscnet.ru/ivs/kvert/current/chkr/index.html .  According to satellite data, ash plumes extended about 266 km (165 mi) to the north-east from the volcano on April 03, and about 55 km (34 mi) to the north-west on April 09.

IF YOU HAVE ANY QUESTIONS OR CONCERNS, PLEASE CONTACT:

Olga Girina, KVERT, IVS FED RAS

E-mail: girina@kscnet.ru

Tel. (41522) 58627

Svetlana Droznina, KVERT, KB GS RAS

E-mail: ssl@emsd.iks.ru

Tel. (41522) 59523

Tom Murray, Scientist-in-Charge, AVO

E-mail: tlmurray@usgs.gov

Tel. 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  olcanology 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 Kurile Volcanoes.

The official web-page of KVERT (the Institute of Volcanology and Seismology FED RAS): http://www.kscnet.ru/ivs/kvert/index.html

Archive of daily information KB GS RAS: ftp://emsd.iks.ru/pub/DATA/RTS/Volcanoes

KVERT Information Releases at the web-page of AVO (Alaska Volcano Observatory): http://www.avo.alaska.edu/activity/avoreport.php?view=kaminfo