Bezymianny

Bezymianny (Russian: Безымянный Bezymyannyyi, meaning unnamed) is an active stratovolcano in Kamchatka, Russia. Bezymianny volcano had been considered extinct until 1955. Activity started in 1955, culminating in a dramatic eruption on 30 March 1956.[2][3] This eruption, similar to that of Mount St. Helens in 1980, produced a large horseshoe-shaped crater that was formed by collapse of the summit and an associated lateral blast. Subsequent episodic but ongoing lava dome growth, accompanied by intermittent explosive activity and pyroclastic flows, has largely filled the 1956 crater. The most recent eruption of lava flows occurred in February 2013.[4] An explosive eruption on 20 December 2017 released an ash plume rising to a height of 15 kilometres (49,000 ft) above sea level, which drifted for 320 kilometres (200 mi) NE.[5] The volcano erupted similarly on 28 May 2022, again spewing an ash plume over 15 kilometres (49,000 ft) high.[6] On April 7, 2023, Russia reported Bezymianny had erupted explosively again and 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 12 kilometres (39,000 ft) and was drifting to the southeast slowly. The ash plume stretched out across a distance of 2,000 kilometres (1,200 mi).[7]

Bezymianny
Kamchatka volcanoes: Klyuchevskaya Sopka (up), Bezymianny (down), both in activity, and the Kamen (middle).
Highest point
Elevation3,020 m (9,910 ft)[1]
Coordinates55°58′42″N 160°35′12″E[1]
Naming
Native nameБезымянный (Russian)
English translationNameless
Geography
Bezymianny is located in Kamchatka Krai
Bezymianny
Bezymianny
Parent rangeEastern Range
Geology
Age of rock4700 years old
Mountain typeStratovolcano
Volcanic fieldKliuchevskoya Volcanic Group
Last eruptionApril 11, 12, and 13 2023 (ongoing)

The modern Bezymianny volcano, much smaller than its massive neighbors Kamen and Kliuchevskoi, was formed about 4700 years ago over a late-Pleistocene 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.

  • Annotated view includes Ushkovsky, Tolbachik, Bezymianny, Zimina, and Udina. Oblique view 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, Bezymianny, Zimina, and Udina. Oblique view taken on 16 November 2013 from ISS.[8] Bezymianny can be seen second from the right. A small plume of "smoke" can be seen.
  • Natural-colour satellite image showing evidence of an eruption at the volcano.
    Natural-colour satellite image showing evidence of an eruption at the volcano.

See also

References
  1. "Bezymianny". www.volcanodiscovery.com. Volcano Discovery.
  2. Gorshkov, G. S. (December 1959). "Gigantic eruption of the volcano bezymianny". Bulletin Volcanologique. 20 (1): 77–109. doi:10.1007/BF02596572. S2CID 129408765.
  3. Kirianov, Vladimir Yu (1994). "Volcanic Ash in Kamchatka as a Source of Potential Hazard to Air Traffic" (PDF). In Casadevall, Thomas J. (ed.). Volcanic Ash and Aviation Safety: Proceedings of the First International Symposium on Volcanic Ash and Aviation Safety. U.S. Geological Survey Bulletin. Vol. 2047. p. 60.
  4. "VONA/KVERT Weekly Information Release 05-2013 - Kamchatkan and Northern Kuriles Volcanic Activity - January 31, 2013, 23:31 UTC (February 01, 2013, 11:31 KST)". Kamchatka Volcanic Eruption Response Team. 1 February 2013. Retrieved 26 February 2016.
  5. Global Volcanism Program, 2017. Report on Bezymianny (Russia). In: Sally Kuhn Sennert, Weekly Volcanic Activity Report, 20–26 December 2017. Smithsonian Institution and US Geological Survey.
  6. "Bezymianny volcano (Kamchatka): massive, possibly sub-plinian eruption today". Volcano Discovery. 28 May 2022. Retrieved 28 May 2022.
  7. "Russia Warns Air Operators Of Erupting Volcano". Simple Flying. 9 April 2023. Retrieved 9 April 2023.
  8. NASA - Activity at Kliuchevskoi


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