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Report on Chirpoi (Russia) — 28 January-3 February 2015


Chirpoi

Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 28 January-3 February 2015
Managing Editor: Sally Sennert.

Please cite this report as:

Global Volcanism Program, 2015. Report on Chirpoi (Russia) (Sennert, S, ed.). Weekly Volcanic Activity Report, 28 January-3 February 2015. Smithsonian Institution and US Geological Survey.

Weekly Report (28 January-3 February 2015)

Chirpoi

Russia

46.532°N, 150.871°E; summit elev. 742 m

All times are local (unless otherwise noted)


SVERT reported that satellite images over Snow, a volcano of Chirpoi, showed a weak thermal anomaly on 26 January. Cloud cover obscured views during 27 January-2 February. The Aviation Color Code remained at Yellow.

Geological Summary. Chirpoi, a small island lying between the larger islands of Simushir and Urup, contains a half dozen volcanic edifices constructed within an 8-9 km wide, partially submerged caldera. The southern rim of the caldera is exposed on nearby Brat Chirpoev Island. The symmetrical Cherny volcano, which forms the central cone of the island, erupted twice during the 18th and 19th centuries. The youngest volcano, Snow, originated between 1770 and 1810. It is composed almost entirely of lava flows, many of which have reached the sea on the southern coast. No recorded eruptions are known from Brat Chirpoev, but its youthful morphology suggests recent Strombolian activity.

Source: Sakhalin Volcanic Eruption Response Team (SVERT)