Report on Ebeko (Russia) — 20 December-26 December 2017
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
20 December-26 December 2017
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2017. Report on Ebeko (Russia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 20 December-26 December 2017. 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 on 16 December an ash plume from Ebeko was identified in satellite images drifting about 15 km SSW. A thermal anomaly was also visible. Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E, observed ash plumes from explosions rising as high as 3.5 km (7,500 ft) a.s.l. during 18-19 and 21-22 December. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).
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.