Volcanic ash emissions from Ruiz volcano reach 7 000 m (23 000 feet) a.s.l., Colombia

Volcanic ash from Ruiz volcano in Colombia was observed at 7 000 m (23 000 feet) above sea level at 23:10 UTC on October 31, 2025. The advisory was issued by the Washington VAAC at 23:27 UTC.

The ash cloud was reported between the surface and flight level 230 (approximately 7 000 m or 23 000 feet). Ash was not detected in satellite imagery due to weather clouds obscuring the summit area, but VONA information indicated new ash emissions. No Aviation Color Code was stated in this advisory. Forecasts indicated ash clouds could reach similar altitudes and move over the next 6 hours with model winds expected to veer more from the east-southeast.

The latest Smithsonian / USGS Weekly Volcanic Activity Report does not include a recent summary for Ruiz volcano within the given reporting period, so no further details on ongoing activity are available from that source.

Nevado del Ruiz is a large stratovolcano located in the Central Andes of Colombia. It is known for a history of explosive eruptions, with hazards including ashfall, pyroclastic flows, and lahars. The 1985 eruption resulted in deadly lahars that devastated the town of Armero, located about 48 km (30 miles) east. Other regional populations including cities such as Manizales and Pereira, which are within 40 km (25 miles), may also be at risk from future volcanic hazards.