USGS Volcano Hazards Program Volcano Update

NMI update page and observatory web site

In a satellite image from January 22, NOAA's Washington Volcanic Ash Advisory Center spotted a possible volcanic plume from Agrigan. Neither USGS nor NOAA have received confirmation of a volcanic source for this anomaly and it is likely the cloud was weather-related.

Agrigan, the next island volcano north of Pagan, is a stratovolcano truncated by a mile-wide caldera. The only known eruption in 1917 was a significant explosive event that buried a village in more than three feet of ash. There are no ground-based monitoring instruments on Agrigan.

Update in Common Alerting Protocol (CAP) format