BEZYMIANNY VOLCANO: 55°58'N, 160°36'E; Elevation 2,895 m
CURRENT LEVEL OF CONCERN COLOR CODE IS YELLOW
PREVIOUS LEVEL OF CONCERN COLOR CODE IS ORANGE

Growth of the lava dome continues. The activity of the volcano could affect low-flying aircraft in the vicinity of the volcano.

The explosive eruption occurred at Bezymianny volcano, probably, from 14:30 till 15:00 UTC on May 11. Clouds obscured the volcano from May 13 till present. According to information by hunters, a large mud flow 200 m in width moved along the Sukhaya Khapitsa river at Bezymianny volcano area on May 17. Probably pyroclastic flow deposits caused a mud flow. According to satellite data, a size of thermal anomaly over the lava dome decreased from 10-25 pixels (on 8-12 May) till 1-4 pixels (on 15-17 May).

KLYUCHEVSKOY VOLCANO; 56°03'N, 160°39'E; Elevation 4,750 m
CURRENT LEVEL OF CONCERN COLOR CODE IS RED

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 strong volcanic tremor were registered, the amplitude of volcanic tremor increased during May 8-15. According to video data and visual observations, Vulcanian activity at the terminal crater and phreatic bursts at the north-western flank of the volcano were observed on May 11 and 16. Ash plumes rose up to 9,7 km (31,800 ft) ASL and extended to the east on May 11 and to the north-east on May 16. Clouds obscured the volcano in the other days. Ash falls were noted at Klyuchi on May 11-12 and May 16-17. A lava flow caused a mud flow in a distance of 10 km on the east from Klyuchi. Mud deposits filled up the Krivaya river. According to satellite data, ash plumes extended for 30-600 km (19-370 mi) to the north, north-east, north-west and east from the volcano all week. A large thermal anomaly over the volcanic crater was noted all days.

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 6.0 km (19,700 ft) ASL occurred at the volcano last week. Clouds obscured the volcano this week. According to satellite data, a big thermal anomaly was noted all week.

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 slightly above background levels last week. According to seismic data, weak local shallow earthquakes occurred at the area of the volcano. Possibly, an ash explosion rose up to 1.7 km (5,600 ft) on May 13.

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