Report on Ekarma (Russia) — 8 September-14 September 2010
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 8 September-14 September 2010
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2010. Report on Ekarma (Russia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 8 September-14 September 2010. Smithsonian Institution and US Geological Survey.
48.958°N, 153.93°E; summit elev. 1170 m
All times are local (unless otherwise noted)
On 13 September, SVERT reported that strong steam-and-gas activity from Ekarma continued. Ekarma does not have a seismic network; satellite image analysis and infrequent ground observations are the primary tool for monitoring many of the Kuril Islands volcanoes.
Geologic Background. The small 5 x 7.5 km island of Ekarma lies 8.5 km N of Shiashkotan Island along an E-W-trending volcanic chain extending westward from the central part of the main Kuril Island arc. It is composed of two overlapping basaltic-andesite to andesitic volcanoes, the western of which has been historically active. Lava flows radiate 3 km in all directions from the summit of the younger cone to the sea, forming a lobate shoreline. A lava dome that was emplaced during the first historical eruption, in 1776-79, forms the peaked summit of the island.