Report on Chirinkotan (Russia) — 25 August-31 August 2021
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
25 August-31 August 2021
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2021. Report on Chirinkotan (Russia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 25 August-31 August 2021. Smithsonian Institution and US Geological Survey.
48.98°N, 153.48°E; summit elev. 724 m
All times are local (unless otherwise noted)
SVERT reported that during 23-26 August ash plumes from Chirinkotan were visible rising 2.5-3.5 km (8,200-11,500 ft) a.s.l. and drifting S and SW. KVERT maintained the Aviation Color Code at Orange (the second highest level on a four-color scale).
Geological Summary. The small, mostly unvegetated 3-km-wide island of Chirinkotan occupies the far end of an E-W volcanic chain that extends nearly 50 km W of the central part of the main Kuril Islands arc. It is the emergent summit of a volcano that rises 3000 m from the floor of the Kuril Basin. A small 1-km-wide caldera about 300-400 m deep is open to the SW. Lava flows from a cone within the breached crater reached the shore of the island. Historical eruptions have been recorded since the 18th century. Lava flows were observed by the English fur trader Captain Snow in the 1880s.
Sources: Sakhalin Volcanic Eruption Response Team (SVERT), Kamchatkan Volcanic Eruption Response Team (KVERT)