CHIKURACHKI VOLCANO 50°19'N, 155°28'E; Elevation 1,816 m
CURRENT LEVEL OF CONCERN COLOR CODE: GREEN
PREVIOUS LEVEL OF CONCERN COLOR CODE: YELLOW

Chikurachki volcano is not monitored with seismic instruments. A visual information about an explosive activity of the volcano was received last time on April 18. According to visual and satellite monitoring, an eruptive activity of the volcano wasn't noted last three weeks.

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 was registered. According to seismic data, probably ash plumes up to 7.0 km (23,000 ft) ASL occurred at the volcano last week. According to visual and video data, hot avalanches from a top of the dome were noted on May 04, 06-07; ash plumes rose up to 6.0 km (19,700 ft) ASL this days. Gas-steam activity of the volcano observed on May 04-07. According to satellite data, ash plumes extended about 50 km (31 mi) to the east from the volcano on May 05 and 07. 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. 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, lava 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 6.7 km (22,000 ft) ASL and extended mainly to the northern directions on May 04-07. Ash fall was noted in Klyuchi on May 04. Sounds of explosions were heard from the side of the volcano in Klyuchi on May 04-06. According to satellite data, ash plumes extended till 350 km (217 mi) to the north-east, north-west, west and east from the volcano this week. A large 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 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: 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. According to visual and video data, weak gas-steam plume was observed on May 04. Clouds obscured the volcano in the other days. According to satellite data, a thermal anomaly over the lava dome was noted on May 06 and 10.

IF YOU HAVE ANY QUESTIONS OR CONCERNS, PLEASE CONTACT:

Olga Girina, KVERT, IVS FED RAS
E-mail: girina@kscnet.ru
Tel. (41522) 58627

Svetlana Toloknova, 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 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.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