Report on Chirpoi (Russia) — April 1987
Scientific Event Alert Network Bulletin, vol. 12, no. 4 (April 1987)
Managing Editor: Lindsay McClelland
Chirpoi (Russia) Fumarolic activity
Please cite this report as:
Global Volcanism Program, 1987. Report on Chirpoi (Russia). In: McClelland, L (ed.), Scientific Event Alert Network Bulletin, 12:4. Smithsonian Institution. http://dx.doi.org/10.5479/si.GVP.SEAN198704-290150.
46.532°N, 150.871°E; summit elev. 742 m
All times are local (unless otherwise noted)
Weak fumarolic activity was occurring from the crater of Snow volcano during a 6 November aerial survey.
Geologic Background. 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 historical eruptions are known from Brat Chirpoev, but its youthful morphology suggests recent strombolian activity.
Information Contacts: G. Steinberg and B. Piskunov, Yuzhno-Sakhalinsk.