Weak ash emissions at Sabancaya volcano observed at 7 010 m (23 000 feet) a.s.l., Peru

Volcanic ash from Sabancaya in Peru was observed at 7 010 m (23 000 feet) above sea level at 11:10 UTC on December 16, 2025. The advisory was issued by the Buenos Aires VAAC at 11:35 UTC.

The ash cloud was detected by satellite (GOES-E) and confirmed on webcam imagery. The emission was described as weak and was moving south-southwest. The observed ash cloud was contained between the surface and flight level 230, equivalent to approximately 7 010 m (23 000 feet). No Aviation Color Code was stated in this advisory. Forecasts for 6 hours after observation placed the ash cloud at the same altitude with no further reports for 12 or 18 hours.

According to the latest Smithsonian/USGS Weekly Volcanic Activity Report, Sabancaya exhibited daily gas-and-steam emissions rising 300–1 100 m (980–3 610 feet) above the crater rim and drifting less than 10 km (6 miles) in various directions. The Alert Level remained at Orange, and the public was advised to stay outside a 12 km (7.5 miles) radius from the summit.

Sabancaya is an active stratovolcano located in southern Peru. Its primary hazards include frequent moderate ash emissions, lava flows, and the potential for pyroclastic flows. The nearest populated areas, including the town of Chivay, are situated tens of kilometers (miles) from the volcano, but ashfall can periodically affect surrounding communities depending on wind conditions.