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Bezymianny

Stratovolcano · Russia · 2882m

A lava dome fills much of the large horseshoe-shaped crater on the ESE side of Bezymianny in this late-1980s view from the SE. The crater formed during an eruption in 1955-56, which was similar to that of Mount St. Helens in 1980 with flank collapse and lateral blast components. Prior to this eruption Bezymianny had been considered extinct. Subsequent episodic lava dome growth, accompanied by intermittent explosive activity and pyroclastic flows, has largely filled the 1956 crater.
A lava dome fills much of the large horseshoe-shaped crater on the ESE side of Bezymianny in this late-1980s view from the SE. The crater formed during an eruption in 1955-56, which was similar to that of Mount St. Helens in 1980 with flank collapse and lateral blast components. Prior to this eruption Bezymianny had been considered extinct. Subsequent episodic lava dome growth, accompanied by intermittent explosive activity and pyroclastic flows, has largely filled the 1956 crater. · Photo: Photo by Yuri Doubik (Institute of Volcanology, Petropavlovsk). · Wikimedia Commons
Type
Stratovolcano
Country
Russia
Region
Northwestern Pacific Volcanic Regions / Eastern Kamchatka Volcanic Arc
Elevation
2882m
Coordinates
55.972, 160.595
Last eruption
2025
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Composite
Major rock type
Andesite / Basaltic Andesite
Geological summary

The modern Bezymianny, much smaller than its massive neighbors Kamen and Kliuchevskoi on the Kamchatka Peninsula, was formed about 4,700 years ago over a late-Pleistocene lava-dome complex and an edifice built about 11,000-7,000 years ago. Three periods of intensified activity have occurred during the past 3,000 years. The latest period, which was preceded by a 1,000-year quiescence, began with the dramatic 1955-56 eruption. This eruption, similar to that of St. Helens in 1980, produced a large open 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.

From Wikipedia

Bezymianny 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. This eruption, similar to the 1980 eruption of Mount St. Helens, produced a large horseshoe-shaped crater that was formed by a sector collapse 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. 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. The volcano erupted similarly on 28 May 2022, again spewing an ash plume over 15 kilometres (49,000 ft) 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 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).

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Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
7050 BCE~6748 BCE · 1 eruptions · max VEI ?5235 BCE~4933 BCE · 1 eruptions · max VEI ?2815 BCE~2513 BCE · 1 eruptions · max VEI ?1606 BCE~1303 BCE · 2 eruptions · max VEI ?698 BCE~396 BCE · 1 eruptions · max VEI 493 BCE~209 · 2 eruptions · max VEI ?209~512 · 1 eruptions · max VEI ?512~814 · 2 eruptions · max VEI 4814~1117 · 2 eruptions · max VEI 41722~2024 · 58 eruptions · max VEI 57050 BCE4933 BCE2513 BCE396 BCE1722

Detailed timeline

  1. 2024VEI ?Observed
    2024-12-24 – 2025-12-04
  2. 2022VEI 3Observed
    2022-03-15 – 2024-08-14
    Summit crater
  3. 2016VEI 3Observed
    2016-12-05 – 2021-02-01
    Summit crater
  4. 2014VEI ?Observed
    2014-06-12 – 2014-08-29
    Summit crater
  5. 2012VEI ?Observed
    2012-02-12 – 2013-06-20
    Summit crater
  6. 2011VEI ?Observed
    2011-09-06 – 2011-10-26
  7. 2010VEI 3Observed
    2010-05-21 – 2011-04-29
    Summit crater
  8. 2009VEI 3Observed
    2009-12-17 – 2010-02-16
  9. 2008VEI 3Observed
    2008-07-11 – 2008-08-23
  10. 2007VEI 3Observed
    2007-05-10 – 2007-12-24
  11. 2006VEI 3Observed
    2006-04-16 – 2006-12-29
  12. 2005VEI 2Observed
    2005-11-29 – 2005-12-01
  13. 2004VEI 3Observed
    2004-01-14 – 2005-02-16
  14. 2003VEI 3Observed
    2003-07-26 – 2003-08-01
  15. 2002VEI 2Observed
    2002-12-25 – 2002-12-28
  16. 2001VEI 3Observed
    2001-07-23 – 2001-08-10
  17. 2001VEI 2Observed
    2001-12-10 – 2002-01-06
  18. 2000VEI 2Observed
    2000-03-14 – 2000-03-26
  19. 2000VEI 2Observed
    2000-07-18 – 2000-11-04
  20. 1999VEI 2Observed
    1999-02-25 – 1999-02-25
  21. 1998VEI 0Observed
    1998-06-20 – 1998-06-22
  22. 1997VEI 3Observed
    1997-05-08 – 1997-05-16
  23. 1997VEI 3Observed
    1997-12-05 – 1997-12-06
  24. 1996VEI 0Observed
    1996-07-23 – 1996-09-01
  25. 1995VEI 3Observed
    1995-09-16 – 1995-10-08
  26. 1994VEI 2Observed
    1994-07-07 – 1994-10-05
  27. 1993VEI 3Observed
    1993-10-21 – 1994-02-04
  28. 1992VEI 2Observed
    1992-03-12 – 1992-06-12
  29. 1990VEI 3Observed
    1990-01-29 – 1991-11-29
  30. 1989VEI 2Observed
    1989-08-01 – 1989-08-04
  31. 1986VEI 2Observed
    1986-03-26 – 1986-06-29
  32. 1986VEI 3Observed
    1986-12-05 – 1988-07-26
  33. 1985VEI 3Observed
    1985-06-12 – 1985-12-14
  34. 1984VEI 3Observed
    1984-02-05 – 1984-12-16
  35. 1981VEI 3Observed
    1981-06-12 – 1983-05-22
  36. 1980VEI 3Observed
    1980-04-18 – 1980-04-19
  37. 1980VEI 2Observed
    1980-08-21 – 1980-08-27
  38. 1979VEI 3Observed
    1979-02-11 – Ongoing
  39. 1979VEI 2Observed
    1979-09-18 – Ongoing
  40. 1978VEI 2Observed
    1978-09-08 – Ongoing
  41. 1977VEI 3Observed
    1977-03-25 – Ongoing
  42. 1976VEI 2Observed
    1976-03-25 – Ongoing
  43. 1971VEI 3Observed
    1971-03-16 – 1974-12-16
  44. 1965VEI 3Observed
    1965-03-09 – 1970-03-16
  45. 1964VEI 2Observed
    1964-06-25 – 1964-09-20
  46. 1964VEI 1Observed
    1964-12-25 – 1964-12-26
  47. 1963VEI 1Observed
    1963-05-16 – 1963-09-16
  48. 1962VEI 2Observed
    1962-10-21 – 1962-11-06
  49. 1961VEI 2Observed
    1961-05-21 – 1961-06-06
  50. 1961VEI 3Observed
    1961-10-18 – 1961-12-15
  51. 1961VEI 3Observed
    1961-03-25 – 1961-03-26
  52. 1960VEI 2Observed
    1960-04-13 – 1960-04-14
  53. 1959VEI 1Observed
    1959-10-15 – 1959-11-04
  54. 1958VEI 1Observed
    1958-01-16 – 1958-02-14
  55. 1958VEI 1Observed
    1958-05-21 – Ongoing
  56. 1958VEI 2Observed
    1958-12-28 – 1959-03-30
  57. 1957VEI 2Observed
    1957-07-31 – 1957-07-31
  58. 1955VEI 5Observed
    1955-10-22 – 1957-03-01
  59. 950VEI 4Geological estimate
    950 – Ongoing
    Summit region and western flank
  60. 850VEI ?Geological estimate
    850 – Ongoing
  61. 700 (±50 yrs)VEI 4Geological estimate
    700 – Ongoing
    East summit region (Razrushenny dome)
  62. 600VEI ?Geological estimate
    600 – Ongoing
  63. 250VEI ?Geological estimate
    250 – Ongoing
  64. 150VEI ?Geological estimate
    150 – Ongoing
  65. 50VEI ?Geological estimate
    50 – Ongoing
  66. 450 BCEVEI 4Geological estimate
    BCE 450 – Ongoing
  67. 1350 BCEVEI ?Geological estimate
    BCE 1350 – Ongoing
  68. 1550 BCE (±500 yrs)VEI ?Geological estimate
    BCE 1550 – Ongoing
    Expeditsii and Exstrusivny Greben
  69. 2750 BCE (±500 yrs)VEI ?Geological estimate
    BCE 2750 – Ongoing
  70. 5050 BCEVEI ?Geological estimate
    BCE 5050 – Ongoing
    Pra-Bezymianny
  71. 7050 BCE (±2000 yrs)VEI ?Geological estimate
    BCE 7050 – Ongoing
    Pra-Bezymianny

External links

⚠ For reference only. Not for emergency response.