Report on Ebeko (Russia) — 24 May-30 May 2023
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 24 May-30 May 2023
Managing Editor: Sally Sennert.
Please cite this report as:
Global Volcanism Program, 2023. Report on Ebeko (Russia) (Sennert, S, ed.). Weekly Volcanic Activity Report, 24 May-30 May 2023. 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 moderate activity at Ebeko was ongoing during 18-25 May. According to volcanologists in Severo-Kurilsk (Paramushir Island, about 7 km E) explosions during 23-25 May generated ash plumes that rose as high as 3.5 km (11,500 ft) a.s.l. and drifted S, SE, and E. A thermal anomaly was identified in satellite images on 24 May and ash plumes were visible drifting 75 km SE on 25 May. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted.
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.