Volcanic ash from Reventador volcano observed at 4 300 m (14 100 feet) a.s.l., Ecuador

Volcanic ash from Reventador in Ecuador was observed at 4 300 m (14 100 feet) above sea level at 22:30 UTC on October 19, 2025. The advisory was issued by the Washington VAAC at 23:04 UTC the same day.

According to the advisory, ash clouds were observed at flight level 140, which is approximately 4 300 m (14 100 feet) above sea level. The ash cloud was seen moving west from the summit in webcam imagery, although it was not detected in satellite images due to meteorological cloud cover. The forecast suggests continued west-northwest movement of the ash cloud up to 12 hours after the observation. No Aviation Color Code was stated in this advisory.

The Smithsonian / USGS Weekly Volcanic Activity Report does not contain a recent summary for Reventador volcano for the week ending September 30, 2025. For the latest information about activity at the volcano, consult official monitoring sources.

Reventador is an andesitic stratovolcano located in the eastern Andes of Ecuador. It is known for frequent explosive eruptions, with hazards including ashfall, pyroclastic flows, and lava flows. The volcano is situated in a remote area, but ash dispersion can occasionally impact air traffic and nearby settlements within tens of kilometers (miles) of the volcano.