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Russia · Stratovolcano

Bolshoy Semyachik

Bolshoi Semiachik

Type
Stratovolcano
Elevation
1720m
Last eruption
-4450
Bolshoi Semiachik is a group of late Pleistocene-Holocene cones and domes located within a large caldera. The massif is seen here from the western rim (Bort ridge). Bolshoi Semiachik volcano is the large late-Pleistocene edifice on the near the center of the horizon. Several Holocene extrusive domes and vigorously active thermal fields are located W and SW of the volcano.
Bolshoi Semiachik is a group of late Pleistocene-Holocene cones and domes located within a large caldera. The massif is seen here from the western rim (Bort ridge). Bolshoi Semiachik volcano is the large late-Pleistocene edifice on the near the center of the horizon. Several Holocene extrusive domes and vigorously active thermal fields are located W and SW of the volcano. · Photo: Copyrighted photo by Nikolai Smelov (Holocene Kamchataka volcanoes; http://www.kscnet.ru/ivs/volcanoes/holocene/main/main.htm).
Type
Stratovolcano
Country
Russia
Region
Northwestern Pacific / Eastern Kamchatka Volcanic Arc
Elevation
1720m
Coordinates
54.320, 160.020
Last eruption
-4450
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Composite
Major rock type
Basalt / Picro-basalt

Geological summary

The Bolshoi Semiachik volcanic complex was constructed within a 10-km-wide caldera whose rim is exposed only on the west.

Excerpt from the Global Volcanism Program, Smithsonian Institution · Read the full summary on GVP →

From Wikipedia

Bolshoy Semyachik is a volcano located in the eastern part of the Kamchatka Peninsula, Russia. It consists of a group of a few stratovolcanoes and lava domes.

Wikipedia · CC BY-SA · Read full article →

Eruption history

2 recordedGlossary

Record summary

Confirmed eruptions
2
Uncertain eruptions
0
Span of confirmed record
6800 BCE (±300 yrs) – 4450 BCE
Largest confirmed eruption
No VEI recorded
Confirmed eruptions since 1900
0
Summary (VEI over time)
Click a bar to see individual eruptions · Use arrow keys to move between bars, Enter to open
6800 BCE~6604 BCE · 1 eruptions · max VEI ?4646 BCE~4450 BCE · 1 eruptions · max VEI ?6800 BCE6212 BCE5625 BCE5233 BCE4646 BCE

Detailed timeline

  1. 4450 BCEVEI ?Geological estimate
    4450 BCE – end unknown
    Korona and Yezh lava domes
  2. 6800 BCE (±300 yrs)VEI ?Geological estimate
    6800 BCE – end unknown
    Ivanov lava dome

Nearby volcanoes

External links

⚠ For reference only. Not for emergency response.