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Bezymianny ("unnamed") was considered extinct until it erupted violently in 1955-56, after a slumber of probably 1000 years. It is one of the most active volcanoes in Kamchatka. The eruption followed a massive flank failure (similar to Mt. St. Helens eruption in 1980) which removed a 0.5 sq km sector of the volcano.
stratovolcano 2882 m / 9,455 ft Central Kamchatka Depression, Kamchatka, 55.98°N / 160.59°E Current status: erupting (4 out of 5) Bezymianny webcams / live data Bezymianny volcano books | Tours Bezymianny volcano eruptions: 2017, 2016, 2012, 2010, 2009, 2008, 2007, 2000-05, 1998, 1997, 1996-97, 1994-95, 1993-94, 1992, 1991, 1990, 1989, 1986-88, 1986, 1985, 1984, 1981-83, 1980, 1980, 1979, 1979, 1978, 1977, 1976, 1971-74, 1965-70, 1964, 1964, 1963, 1962, 1961, 1961, 1961, 1960, 1959, 1958-59, 1958, 1958, 1957, 1955-57 Typical eruption style: Explosive Last earthquakes nearby
On 15 June KVERT reported that the temperature of a thermal anomaly identified in satellite images had increased, and that the webcam recorded a gas-and-steam plume rising above Bezymianny to 4 km (13,100 ft) a.s.l. and drifted SSE. ...more
Hot avalanches of material originated from the lava dome. An explosive event began at 16:53 on 16 June, producing an ash cloud 28 x 25 km in size that drifted NE. The Aviation Color Code was raised to Red (the highest level on a four-color scale), but lowered back down to Orange about 5 hours later. At 21:10 the ash cloud was 212 x 115 km in size and drifting E; the leading edge of the cloud was about 245 km E. (from: Smithsonian / USGS Weekly Volcanic Activity Report 14-20 June 2017) [less]
KVERT reported gas-and-steam activity at Bezymianny during 28 April-5 May, and a daily thermal anomaly identified in satellite images. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).
The volcano's activity has calmed down after the sudden strong explosions 2 days ago. ...more
According to KVERT, a lava flow descended on the northwestern flank (although this might be the hot deposit from the pyroclastic flow during the explosive activity). Webcam imagery shows a strong decrease in heat at the summit although degassing remains elevated. KVERT lowered the Aviation Color Code back to orange only 6 hours after the second explosion on 9 March. [less]
Ash plume from Bezyianny's second explosion on 9 March 2017 (image: KB-GS-RAS, annotatons: Culture Volcan)
A phase of strong explosions occurred at the volcano on 9 March. The activity came as a surprise in its intensity after the volcano had been relatively calm during the previous weeks. ...more
Starting shortly before 14:00 local time, two distinct explosions took place at the volcano at an interval of 30 minutes. Both generated large ash plumes that rose to estimated 10 km altitude and drifted northwest. After only two hours, the ash had reached more than 350 km distance and drifted over the Gulf of Chelikhov in the northeastern part of the Sea of Okhostsk.
The two ash plumes from the explosions, an a third more discrete one from a pyroclastic flow on the north-west slope (block avalanche or pyroclastic flow) (image: KB-GS-RAS, annotations: Culture Volcan)
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