DOI-USGS-NMI-2013-01-25T11:09:57+10:00 NorthernMarianaIslands@usgs.gov 2013-01-25 11:09:56 Actual Alert Public Geo Unknown Minor Unlikely 2013-01-25 11:09:56 2013-01-26 11:09:56 Northern Mariana Islands Agrigan Weekly Update 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. http://volcanoes.usgs.gov/cnmistatus.php Volcano Alert Level=UNASSIGNED Aviation Color Code=UNASSIGNED Agrigan volcano Mariana Islands 18.77 145.67 CAVW=0804-16=