Report on Ebeko (Russia) — 8 April-14 April 2009
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 8 April-14 April 2009
Managing Editor: Sally Sennert.
Please cite this report as:
Global Volcanism Program, 2009. Report on Ebeko (Russia) (Sennert, S, ed.). Weekly Volcanic Activity Report, 8 April-14 April 2009. Smithsonian Institution and US Geological Survey.
50.686°N, 156.014°E; summit elev. 1103 m
All times are local (unless otherwise noted)
KVERT reported that during 3-10 April observers from Severo-Kurilsk, about 7 km E of Ebeko, observed continued activity. Gas-and-steam plumes with some ash content rose to an altitude of 3.4 km (11,200 ft) a.s.l. and drifted 8 km in southerly directions. Light ashfall was reported in Severo-Kurilsk on 5 April. The Level of Concern Color Code remained at Yellow. Based on analysis of satellite imagery and information from Yelizovo Airport, the Tokyo VAAC reported that on 12 April an ash plume drifted 6 km SE at an altitude of 1.5 km (5,000 ft) a.s.l.
Geological Summary. The flat-topped summit of the central cone of Ebeko volcano, one of the most active in the Kuril Islands, occupies the northern end of Paramushir Island. Three summit craters located along a SSW-NNE line form Ebeko volcano proper, at the northern end of a complex of five volcanic cones. Blocky lava flows extend west from Ebeko and SE from the neighboring Nezametnyi cone. The eastern part of the southern crater contains strong solfataras and a large boiling spring. The central crater is filled by a lake about 20 m deep whose shores are lined with steaming solfataras; the northern crater lies across a narrow, low barrier from the central crater and contains a small, cold crescentic lake. Historical activity, recorded since the late-18th century, has been restricted to small-to-moderate explosive eruptions from the summit craters. Intense fumarolic activity occurs in the summit craters, on the outer flanks of the cone, and in lateral explosion craters.