KVERT INFORMATION RELEASE 12-07
Friday, April 20, 2007, 11:15 KDT (April 19, 22:15 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 6.5 km (21,300 ft) ASL occurred at the volcano. According to visual and video data, ash plumes rose up to 5.5 km (18,000 ft) last week. According to satellite data, ash plumes extended 25-280 km (16-174 mi) mainly to the east, south-east and south from the volcano each day of this week. A big thermal anomaly was noted all week.
KLYUCHEVSKOY VOLCANO; 56°03'N, 160°39'E; Elevation 4,750 m
CURRENT LEVEL OF CONCERN COLOR CODE IS ORANGE.
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, Strombolian activity at the volcanic crater were observed all week. An intensification of fumarolic activity was noted on April 15 and 17-18. Gas-steam plumes, possibly containing small amount of ash rose up to 6.3 km (20,700 ft) ASL on April 15 and up to 7.2 km (23,600 ft) ASL on April 17-18, and extended to the different directions from the volcano last week. A thermal anomaly over the volcanic crater was noted all days.
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 all week and possibly, ash explosions up to 4.0 km (13,100 ft) ASL on April 15-16, and weak ash explosions in the other days occurred at the volcano. According to visual data by volcanologists who work now at the volcano a gas-steam rose up to 2.5 km (8,200 ft) ASL on April 19. The crater of the volcano have changes. Possibly a small new lava flow lie at the south-western flank of the volcano. According to satellite data, a thermal anomaly over the volcano was noted on April 14-16. An ash plume extended about 20 km to the east from the volcano on April 16.
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.
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. Seismic activity did not exceed background levels on April 13-14. According to visual and video data, gas-steam plumes rose up to 3.8 km (12,500 ft) ASL and extended mainly to the southern directions from the volcano last week. According to satellite data, a thermal anomaly over the lava dome was noted on April 13-18.
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, there are bursts of volcanic bombs were noted by hunters near the volcano on April 15. An ash plume rose up to 3.8 km (12,500 ft) ASL and extended to the north from the volcano on April 18. According to satellite data, ash plumes extended about 9-20 km (5.6-12.4 mi) from the volcano to the south-east on April 14, and to the west-northwest on April 15-16.
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