Volcanic ash cloud from Klyuchevskoy volcano observed at 7 010 m (23 000 feet) a.s.l., Russia

Volcanic ash from Klyuchevskoy in Russia was observed at 7 010 m (23 000 feet) above sea level at 18:00 UTC on October 14, 2025. The advisory was issued by VAAC Anchorage at 18:00 UTC.

The ash cloud was observed at an altitude of 7 010 m (23 000 feet), based on information from the Himawari/GOES satellites. The cloud’s extent was delineated with polygon coordinates and associated with a previous eruption. The current Aviation Color Code is Orange. Forecast data provided ash movement projections for the next 6 hours but did not supply forecasts beyond 12 hours from the advisory time.

According to the Smithsonian/USGS Weekly Volcanic Activity Report, recent activity at Klyuchevskoy had subsided, with no resuspended ash observed as of late September 2025. Only fumarolic emissions were visible, and the Aviation Color Code had previously been lowered to Green.

Klyuchevskoy is a stratovolcano located on the Kamchatka Peninsula, Russia. It is the highest active volcano in Eurasia, with a summit elevation of 4 835 m (15 862 feet). Hazards from this volcano include volcanic ash clouds, lava flows, and pyroclastic flows. The nearest population center is the town of Klyuchi, located approximately 30 km (19 miles) northeast of the volcano, which could be at risk during significant eruptive events.