Residual ash 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 12:00 UTC on October 15, 2025. The advisory was issued by the Anchorage VAAC at 12:00 UTC.

According to the advisory, the ash cloud was reported between the surface and flight level 230 (approximately 7 010 m or 23 000 feet). Ongoing residual volcanic ash from a previous eruption was detected using Himawari satellite data. The ash dispersion was forecast up to 7 010 m (23 000 feet) for the next 6 hours. The current Aviation Color Code is Orange.

The most recent report from the Global Volcanism Program (KVERT, 24–30 September 2025) stated that wind was no longer resuspending ash previously deposited on the north flank of Klyuchevskoy. Only fumarolic emissions were observed, and the Aviation Color Code was lowered to Green on September 25, 2025.

Klyuchevskoy is a stratovolcano located on the Kamchatka Peninsula, Russia, and is one of the most active volcanoes in the region. Its eruptions are characterized by explosive activity, ash plumes, and pyroclastic flows. Nearby settlements, including the town of Klyuchi (approximately 30 km or 19 miles northeast), may be affected by ashfall during significant eruptions.