Report on Alaid (Russia) — April 1987
Scientific Event Alert Network Bulletin, vol. 12, no. 4 (April 1987)
Managing Editor: Lindsay McClelland.
Alaid (Russia) Fumarolic activity in crater
Please cite this report as:
Global Volcanism Program, 1987. Report on Alaid (Russia) (McClelland, L., ed.). Scientific Event Alert Network Bulletin, 12:4. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198704-290390
50.861°N, 155.565°E; summit elev. 2285 m
All times are local (unless otherwise noted)
In November 1986, the main fumarolic activity was concentrated in one large vent in the crater. The vent's outer slopes were hot and snow-free while most of the crater area was covered in snow that had fallen September-October. No consistent snow patches had been seen in the crater during autumn 1982 overflights.
A scoria cone had formed within the summit crater during the large 1981 eruption (Fedotov and others, 1981, 1982). During aerial observations in September 1982, fumarolic activity was concentrated at three new vents at the site of this cone. Geologists believed that these vents formed during a brief eruption on 2 March 1982, detected by the GMS satellite. The changed vent distribution was thought to have been the result of an eruption between 1982 and 1986 that was not observed. The volcano is remote and its weather is often poor.
References. Fedotov, S.A., Ivanov, B.V., Avdeiko, G.P., Flerov, G.B., Andreyev, V.N., Dvigalo, V.N., Dubik, Y.M., Cherkov, A.M., 1981, 1981 eruption of the Alaid volcano: Volcanology and Seismology no. 5, p. 82-87.
Fedotov, S.A., Ivanov, B.V., Flerov, G.B., Avdeiko, G.P., Budnikov, V.A., Andreev, V.N., Gordeev, E.I., Dvigalo, V.N., Shirokov, V.A., 1982, Eruption of Alaid volcano (Kurile Islands) in 1981: Volcanology and Seismology, no. 6, p. 9-27.
Geological Summary. The highest and northernmost volcano of the Kuril Islands, Alaid is a symmetrical stratovolcano when viewed from the north, but has a 1.5-km-wide summit crater that is breached open to the south. This basaltic to basaltic-andesite volcano is the northernmost of a chain constructed west of the main Kuril archipelago. Numerous pyroclastic cones are present the lower flanks, particularly on the NW and SE sides, including an offshore cone formed during the 1933-34 eruption. Strong explosive eruptions have occurred from the summit crater beginning in the 18th century. Reports of eruptions in 1770, 1789, 1821, 1829, 1843, 1848, and 1858 were considered incorrect by Gorshkov (1970). Explosive eruptions in 1790 and 1981 were among the largest reported in the Kuril Islands.
Information Contacts: G. Steinberg and B. Piskunov, Yuzhno-Sakhalinsk.