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Malyj Semiačik

Maly Semyachik

Caldera · Russia · 1527 m

Maly Semiachik is located within several nested Pleistocene calderas and composed of three overlapping edifices along a NE-SW line. Activity migrated to the SW, eventually forming the youngest cone, Ceno-Semiachik. It contains the historically active Troitsky crater, which formed during an explosive eruption about 400 years ago. It contains a hot, acidic lake this 1972 photo.
Maly Semiachik is located within several nested Pleistocene calderas and composed of three overlapping edifices along a NE-SW line. Activity migrated to the SW, eventually forming the youngest cone, Ceno-Semiachik. It contains the historically active Troitsky crater, which formed during an explosive eruption about 400 years ago. It contains a hot, acidic lake this 1972 photo. · Foto: Photo by Oleg Volynets, 1972 (Institute of Volcanology, Petropavlovsk). · Wikimedia Commons
Tipo
Caldera
Paese
Russia
Regione
Northwestern Pacific Volcanic Regions / Eastern Kamchatka Volcanic Arc
Altitudine
1527 m
Coordinate
54.135, 159.674
Ultima eruzione
1952
Contesto tettonico
Subduction zone / Continental crust (> 25 km)
Forma vulcanica
Composite
Roccia principale
Basalt / Picro-Basalt
Sintesi geologica

Maly Semyachik is a compound stratovolcano located in a 10-km-wide caldera within the 15 x 20 km mid-Pleistocene Stena-Soboliny caldera. Following construction during the late Pleistocene of the Paleo-Semiachik volcano beginning about 20,000 years before present (BP), activity migrated to the SW, forming Meso-Semiachik (about 11,000-9,000 BP) and Ceno-Semiachik (about 8,000 BP to the present). An initial stage lasting about 3,500 years was dominantly explosive, constructing the present cone. A second stage beginning about 4,400 years ago was marked by alternating constructive and destructive processes. A crater lake fills the historically active Troitsky Crater, which formed during a large explosive eruption about 400 years ago.

Sintesi da Wikipedia

Il Malyj Semjačik è uno stratovulcano attivo situato nella parte orientale della Kamčatka, in Russia.

Wikipedia · CC BY-SA · Leggi l'articolo completo →

Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
7550 BCE~7233 BCE · 1 eruzioni · VEI max. ?7233 BCE~6917 BCE · 1 eruzioni · VEI max. ?6283 BCE~5966 BCE · 1 eruzioni · VEI max. ?5966 BCE~5650 BCE · 2 eruzioni · VEI max. ?5650 BCE~5333 BCE · 1 eruzioni · VEI max. ?5333 BCE~5016 BCE · 1 eruzioni · VEI max. ?4699 BCE~4383 BCE · 2 eruzioni · VEI max. ?3749 BCE~3432 BCE · 1 eruzioni · VEI max. ?2482 BCE~2166 BCE · 2 eruzioni · VEI max. ?1849 BCE~1532 BCE · 1 eruzioni · VEI max. ?899 BCE~582 BCE · 2 eruzioni · VEI max. ?582 BCE~265 BCE · 1 eruzioni · VEI max. ?1319~1635 · 2 eruzioni · VEI max. 41635~1952 · 5 eruzioni · VEI max. 37550 BCE5333 BCE2799 BCE582 BCE1635

Cronologia dettagliata

  1. 1952VEI 2Osservata
    1952-12-05 – In corso
    Ceno-Semiachik (Toitsky Crater)
  2. 1945VEI 2Osservata
    1945-09 – 1946-04-15
    Ceno-Semiachik (Toitsky Crater)
  3. 1852VEI 2Osservata
    1852-04-15 – 1852-07
    Ceno-Semiachik (Troitsky Crater)
  4. 1851VEI 2Osservata
    1851-09 – In corso
    Ceno-Semiachik (Troitsky Crater)
  5. 1804VEI 3Osservata
    1804 – In corso
    Ceno-Semiachik (Troitsky Crater)
  6. 1550VEI 4Stima geologica
    1550 – In corso
    Ceno-Semiachik (Crater VI--Troitsky)
  7. 1400 (±50 anni)VEI ?Stima geologica
    1400 – In corso
    Ceno-Semiachik (Crater V)
  8. 550 a.C.VEI ?Stima geologica
    BCE 550 – In corso
    Ceno-Semiachik
  9. 650 a.C.VEI ?Stima geologica
    BCE 650 – In corso
    Ceno-Semiachik
  10. 850 a.C.VEI ?Stima geologica
    BCE 850 – In corso
    Ceno-Semiachik
  11. 1800 a.C. (±50 anni)VEI ?Stima geologica
    BCE 1800 – In corso
    Ceno-Semiachik (SW flank)
  12. 2250 a.C.VEI ?Stima geologica
    BCE 2250 – In corso
    Ceno-Semiachik
  13. 2450 a.C.VEI ?Stima geologica
    BCE 2450 – In corso
    Ceno-Semiachik (Crater IV)
  14. 3500 a.C. (±50 anni)VEI ?Stima geologica
    BCE 3500 – In corso
    Ceno-Semiachik flank (Obmanuvshy)
  15. 4500 a.C. (±50 anni)VEI ?Stima geologica
    BCE 4500 – In corso
    Ceno-Semiachik flank (Yushny cone)
  16. 4650 a.C.VEI ?Stima geologica
    BCE 4650 – In corso
    Ceno-Semiachik
  17. 5050 a.C.VEI ?Stima geologica
    BCE 5050 – In corso
    Ceno-Semiachik
  18. 5450 a.C.VEI ?Stima geologica
    BCE 5450 – In corso
    Ceno-Semiachik
  19. 5750 a.C.VEI ?Stima geologica
    BCE 5750 – In corso
    Ceno-Semiachik
  20. 5850 a.C.VEI ?Stima geologica
    BCE 5850 – In corso
    Ceno-Semiachik
  21. 6150 a.C.VEI ?Stima geologica
    BCE 6150 – In corso
    Ceno-Semiachik
  22. 6950 a.C.VEI ?Stima geologica
    BCE 6950 – In corso
    Meso-Semiachik east flank (Vostochny)
  23. 7550 a.C.VEI ?Stima geologica
    BCE 7550 – In corso
    Meso-Semiachik

Link esterni

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