Main Volcanoes Brat Chirpoev

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Caldera Gorshkova Unnamed 3
  Facts
Name: Brat Chirpoev
GVP Number: 290150
Synonims: Tirihoi, Tirihoigaku, Chirihoi, Chirihoigaku
Region: Kuril Islands
Volcanic Area: Southern Kuriles
Coordinates:
46°27'50" N   150°47'39" E
Absolute Elevation: 752 m
Status: Active
Aviation Color Code: GREEN
Location: The Island-volcano Brat Chirpoev is separated from Chirpoy Island by Bystry Strait 2.7 km wide
Type: Stratovolcano
Composition: olivine-pyroxene basalts
Recent Known Eruption: Undated, but probable Holocene eruption
Description
The central structure of the volcano Brat Chirpoev is located on the northwestern part of the Island, and consists of a large number of closely merged cones and craters. All of them are located along an arc of a circle, reflecting to some extent the outlines of the ancient caldera with a diameter of about 4 - 5 km. The extreme southwestern cone - actually Brat Chirpoev - has the largest dimensions and a summit crater with a diameter of about 250 m in the form of a deep funnel. The slopes of the cone are covered with a continuous cloak of cherry-red slag, lava flows are exposed only in sections of rocks. A deep and wide pothole descends along the western slope from the crater to the seashore. The lavas and slags of Brat Chirpoev volcano are olivine-pyroxene basalt. Eruptions of this volcano in historical time are not recorded [Горшков, 1967].

References

Горшков Г.С. Вулканизм Курильской островной дуги / Отв. ред. Рудич К.Н. 1967. 288 с.
Potencial Hazard
Ash clouds, ash falls, hot avalanches and lahars are a potential hazard associated with explosive eruptions of this volcano. The volcano poses a potential hazard to international and local airlines passing in the Kuriles region, since the height of its ash emissions can reach 10 km above sea level, ash plumes and clouds can drift hundreds of kilometers from the volcano in different directions. In addition, the outflow of lava flows onto the slopes of the volcano and the surrounding area is possibly.


 

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