Bezymianny ( ''Bezymyannyyi'', meaning ''unnamed'') is an active

stratovolcano A stratovolcano, also known as a composite volcano, is a typically conical volcano built up by many alternating layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with ...

Kamchatka The Kamchatka Peninsula (, ) is a peninsula in the Russian Far East, with an area of about . The Pacific Ocean and the Sea of Okhotsk make up the peninsula's eastern and western coastlines, respectively. Immediately offshore along the Pacific ...

Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...

. Bezymianny volcano had been considered extinct until 1955. Activity started in 1955, culminating in a dramatic eruption on 30 March 1956. This eruption, similar to the

1980 eruption of Mount St. Helens In March 1980, a series of volcanic explosions and pyroclastic flows began at Mount St. Helens in Skamania County, Washington, United States. A series of Phreatic eruption, phreatic blasts occurred from the summit and escalated until a major ...

, produced a large horseshoe-shaped crater that was formed by a

sector collapse A sector collapse or lateral collapse is the structural failure and subsequent collapse of a minimum volume of of a volcano. Unlike smaller flank collapses, a sector collapse can involve the central volcanic pipe and historically this term had b ...

and an associated lateral blast. Subsequent episodic but ongoing

lava dome In volcanology, a lava dome is a circular, mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano. Dome-building eruptions are common, particularly in convergent plate boundary settings. Around 6% of eruptions ...

growth, accompanied by intermittent explosive activity and

pyroclastic flow A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ground away from a volcano at average speeds of b ...

s, has largely filled the 1956 crater. The most recent eruption of lava flows occurred in February 2013. An explosive eruption on 20 December 2017 released an ash plume rising to a height of above sea level, which drifted for NE. The volcano erupted similarly on 28 May 2022, again spewing an ash plume over high. On April 7, 2023, Russia reported Bezymianny had erupted explosively again and the Federal Agency for Air Transport, Rosaviatsiya, issued a Notice to Airmen (NOTAM) and raised the aviation Color Code Red. The eruption formed a column of ash that rose to a height of and was drifting to the southeast slowly. The ash plume stretched out across a distance of . The modern Bezymianny volcano, much smaller than its massive neighbors

Kamen Kamen () is a town in North Rhine-Westphalia, Germany, in the district Unna. Geography Kamen is situated at the east end of the Ruhr area, approximately 10 km south-west of Hamm and 25 km north-east of Dortmund. Neighbouring citie ...

and

Kliuchevskoi Klyuchevskaya Sopka (; also known as Klyuchevskoi, ) is a stratovolcano, the highest mountain of Siberia and the highest active volcano of Eurasia. Its steep, symmetrical cone towers about from the Bering Sea. The volcano is part of the natural ...

, was formed about 4700 years ago over a late-

Pleistocene The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fin ...

lava-dome complex and an ancestral volcano that was built between about 11,000–7000 years ago. There have been three periods of intensified activity in the past 3000 years.

Gallery

File:ISS-38 Kliuchevskoi Volcano on Kamchatka.jpg, alt=Annotated view includes Ushkovsky, Tolbachik, Bezymianny, Zimina, and Udina. An Oblique view was taken on November 16, 2013 from ISS. Bezymianny can be seen 2nd from the right. A small plume of "smoke" can be seen., Annotated view includes Ushkovsky,

Tolbachik Tolbachik () is a complex volcano, volcanic complex on the Kamchatka Peninsula in the far east of Russia. It consists of two volcanoes, Plosky (''flat'') Tolbachik (3,085 m) and Ostry (''sharp'') Tolbachik (3,672 m), which as the names suggest a ...

, Bezymianny, Zimina, and

Udina Udina () is a volcanic massif located in the central part of the Kamchatka Peninsula, Russia. It comprises two distinct conical stratovolcanoes: Bolshaya Udina, standing at 2,920 meters, and Malaya Udina, with a height of 1,945 meters. Malaya ...

. Oblique view taken on 16 November 2013 from ISS.NASA - Activity at Kliuchevskoi
/ref> Bezymianny can be seen second from the right. A small plume of "smoke" can be seen. File:Bezymyannyi volcano.jpg, File:Bezymianny Volcano Natural Color.jpg, Natural-colour satellite image showing evidence of an eruption at the volcano.

References

External links

*
Bezymianny Volcano live webcam

Google Maps satellite image

* For its eruptive history, go to http://www.volcano.si.edu/volcano.cfm?vn=300250 and click on its tab marked "Eruptive History". Active volcanoes Volcanoes of the Kamchatka Peninsula Mountains of the Kamchatka Peninsula Subduction volcanoes VEI-5 volcanoes 20th-century volcanic events Stratovolcanoes of Russia Holocene stratovolcanoes Holocene Asia {{KamchatkaKrai-geo-stub

Gallery

See also

References

External links