Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Bolshoi Semiachik
Bolshoi ("Big") Semiachik is a group of Late Pleistocene-Holocene stratovolcanoes and extrusive domes located within a large caldera. The massif is seen here from the western rim of the caldera (Bort ridge). Bolshoi Semiachik (Zubchatka or Zubchatyi) volcano per se is the large Late-Pleistocene edifice on the left-center horizon. Several Holocene extrusive domes and vigorously active thermal fields are located west and SW of the volcano. Copyrighted photo by Nikolai Smelov (Holocene Kamchataka volcanoes; http://www.kscnet.ru/ivs/volcanoes/holocene/main/main.htm).
Volcano Number:300150
Volcano Name:Bolshoi Semiachik
Country:Russia
Volcano Type:Stratovolcano(es)
Last Eruption:4450 BCE
Elevation:1720m
Tectonic Setting:Subduction zone / Continental crust (> 25 km)
Pop. within 5km:0
Pop. within 10km:0
Pop. within 30km:554
Pop. within 100km:7373
Latitude:54.32
Longitude:160.02



Eruption Data from the Global Volcanism Program of the Smithsonian Institution
Volcano Number Volcano Name Eruption Number Activity Type Explosivity Index Max Explosivity Index Modifier Activity Area Activity Unit Start Evidence Method Start Date End Date
300150 Bolshoi Semiachik 17641 Confirmed Eruption Ivanov lava dome Radiocarbon (uncorrected) -6800
300150 Bolshoi Semiachik 17642 Confirmed Eruption Korona and Yezh lava domes Radiocarbon (corrected) -4450
Emissions Data from the Global Volcanism Program of the Smithsonian Institution
Sorry. No emissions data found for this volcano.


Data from the Earthchem Library
Sorry. No data exist for this volcano in the EarthChem Library.
Data from the Earthchem Portal


Data from the SESAR Database
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Data from the MaGa Database
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