New ash emissions reported at Ruiz volcano reach 6 700 m (22 000 feet) a.s.l., Colombia

Volcanic ash from Ruiz volcano in Colombia was observed at 6 700 m (22 000 feet) above sea level at 03:00 UTC on October 23, 2025. The advisory was issued by the Washington VAAC at 03:30 UTC on the same day.

The advisory indicates new volcanic ash emissions, with the ash cloud reaching from the surface up to flight level 220 (approximately 6 700 m or 22 000 feet). Due to weather clouds in the summit area, the ash cloud was not detected on satellite imagery; the report is based on Volcanic Observatory Notice for Aviation (VONA) communications. No Aviation Color Code was stated in this advisory.

No recent activity for Ruiz volcano is included in the most recent Smithsonian / USGS Weekly Volcanic Activity Report.

Nevado del Ruiz is an active stratovolcano located in the Andes of central Colombia. Known hazards include explosive eruptions producing ashfall, pyroclastic flows, and lahars, which have previously affected nearby settlements such as Armero and towns in the Tolima and Caldas departments. Populations living within 30 km (19 miles) are at risk from volcanic hazards, including the city of Manizales situated approximately 30 km (19 miles) from the volcano.