Maly Semiachik

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  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 54.13°N
  • 159.67°E

  • 1560 m
    5117 ft

  • 300140
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

There are no activity reports for Maly Semiachik.



 Available Weekly Reports

There are no Weekly Reports available for Maly Semiachik.

Summary of eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1952 Dec 5 ± 4 days Unknown Confirmed 2 Historical Observations Ceno-Semiachik (Toitsky Crater)
1945 Sep (?) 1946 Apr 15 ± 45 days Confirmed 2 Historical Observations Ceno-Semiachik (Toitsky Crater)
1852 Apr 15 ± 45 days 1852 Jul Confirmed 2 Historical Observations Ceno-Semiachik (Troitsky Crater)
1851 Sep Unknown Confirmed 2 Historical Observations Ceno-Semiachik (Troitsky Crater)
1804 Unknown Confirmed 3 Historical Observations Ceno-Semiachik (Troitsky Crater)
1550 (?) Unknown Confirmed 4 Radiocarbon (corrected) Ceno-Semiachik (Crater VI--Troitsky)
1400 ± 50 years Unknown Confirmed   Radiocarbon (corrected) Ceno-Semiachik (Crater V)
0550 BCE (?) Unknown Confirmed   Radiocarbon (corrected) Ceno-Semiachik
0650 BCE (?) Unknown Confirmed   Radiocarbon (corrected) Ceno-Semiachik
0850 BCE (?) Unknown Confirmed   Radiocarbon (corrected) Ceno-Semiachik
1800 BCE ± 50 years Unknown Confirmed   Radiocarbon (corrected) Ceno-Semiachik (SW flank)
2250 BCE (?) Unknown Confirmed   Radiocarbon (corrected) Ceno-Semiachik
2450 BCE (?) Unknown Confirmed   Radiocarbon (corrected) Ceno-Semiachik (Crater IV)
3500 BCE ± 50 years Unknown Confirmed   Radiocarbon (corrected) Ceno-Semiachik flank (Obmanuvshy)
4500 BCE ± 50 years Unknown Confirmed   Radiocarbon (corrected) Ceno-Semiachik flank (Yushny cone)
4650 BCE (?) Unknown Confirmed   Radiocarbon (corrected) Ceno-Semiachik
5050 BCE (?) Unknown Confirmed   Radiocarbon (corrected) Ceno-Semiachik
5450 BCE (?) Unknown Confirmed   Radiocarbon (corrected) Ceno-Semiachik
5750 BCE (?) Unknown Confirmed   Radiocarbon (corrected) Ceno-Semiachik
5850 BCE (?) Unknown Confirmed   Radiocarbon (corrected) Ceno-Semiachik
6150 BCE (?) Unknown Confirmed   Radiocarbon (corrected) Ceno-Semiachik
6950 BCE (?) Unknown Confirmed   Radiocarbon (uncorrected) Meso-Semiachik east flank (Vostochny)
7550 BCE (?) Unknown Confirmed   Radiocarbon (uncorrected) Meso-Semiachik

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Erlich E N, 1986. Geology of the calderas of Kamchatka and Kurile Islands with comparison to calderas of Japan and the Aleutians, Alaska. U S Geol Surv Open-File Rpt, 86-291: 1-300.

Fedotov S A, Masurenkov Y P (eds), 1991. Active Volcanoes of Kamchatka. Moscow: Nauka Pub, 2 volumes.

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..

Kozhemyaka N N, 1995. Active volcanoes of Kamchatka: types and growth time of cones, total volumes of erupted material, productivity, and composition of rocks. Volc Seism, 16: 581-594 (English translation).

Melekestsev I V, Braitseva O A, Ponomareva V V, 1989. Prediction of volcanic hazards on the basis of the study of dynamics of volcanic activity, Kamchatka. In: Latter J H (ed), {Volcanic Hazards - Assessment and Monitoring}, Berlin: Springer-Verlag, p 10-35.

Newhall C G, Dzurisin D, 1988. Historical unrest at large calderas of the world. U S Geol Surv Bull, 1855: 1108 p, 2 vol.

Vlodavetz V I, Piip B I, 1959. Kamchatka and Continental Areas of Asia. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 8: 1-110.

Maly Semiachik 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 11,000-9000 BP) and Ceno-Semiachik (about 8000 BP to the present). An initial stage lasting about 3500 years was dominantly explosive, constructing the present cone. A second stage beginning about 4400 years ago was marked by alternating constructive and destructive processes during which the volcano was destroyed by major explosions and then reconstructed. A crater lake fills the historically active Troitsky Crater, which formed during a large explosive eruption about 400 years ago.