Volcanic ash from Sangay volcano observed at 6 700 m (22 000 feet) a.s.l., Ecuador

Volcanic ash from Sangay volcano in Ecuador was observed at 6 700 m (22 000 feet) above sea level at 12:00 UTC on October 25, 2025. The advisory was issued by the Washington VAAC at 12:37 UTC.

The ash cloud was detected at surface to flight level 220, corresponding to 6 700 m (22 000 feet). Satellite data from GOES-19, together with numerical weather prediction models, supported the observation of light volcanic ash emissions likely up to approximately 18 km (11 miles) west-southwest and west-northwest from the summit. Weather clouds partially obscured the area west of the summit. No Aviation Color Code was stated in this advisory.

There is no recent Smithsonian / USGS Weekly Volcanic Activity Report for Sangay included in the current GVP summary feed covering the observation date. As such, no additional context about ongoing eruptive activity is available here.

Sangay is a stratovolcano located in central Ecuador, part of the northern Andes volcanic arc. It is known for frequent explosive eruptions and continuous ash emission. The volcano poses hazards primarily due to ashfall, lava flows, and pyroclastic flows. Populated areas at risk include Alao, Macas, and other communities downwind of the volcano, particularly to the west and northwest within 100 km (62 miles).