FVXX20 KNES 211638 VOLCANIC ASH ADVISORY ISSUED: 2005JUL21/1638Z VAAC: WASHINGTON VOLCANO: ANATAHAN 0804-20 LOCATION: N1621E14540 AREA: MARIANA.ISLANDS SUMMIT ELEVATION: 2585 FT (788 M) ADVISORY NUMBER: 2005/572 INFORMATION SOURCE: GUAM WFO. HONOLULU MWO. GFS MODEL WINDS. RADIOSONDE. GOES-9. USGS. ERUPTION DETAILS: ERUPTION AT 20/2215Z OBS ASH DATE/TIME: 21/1613Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL200 MOVING TO NE 25-30 KNOTS. FCST ASH CLOUD +6H: 21/2200Z FCST ASH CLOUD +12H: 22/0400Z FCST ASH CLOUD +18H: 22/1000Z REMARKS: ASH CANNOT BE SEEN IN SATELLITE IMAGERY THROUGH 21/1613Z. GUAM MET REPORTS SEISMIC ACTIVITY STARTING AT 21/1452Z AND LASTING ABOUT 6 MINUTES. ASH COULD NOT BE SEEN IN RADAR AFTER THIS SEISMIC ACTIVITY. CLOUD COVER FROM A DEVELOPING TROPICAL SYSTEM AT 138E IS MAKING IT DIFFICULT TO DETECT ASH OR ANY TYPE OF ACTIVITY IN SATELLITE IMAGERY. WE WILL CONTINUE TO CLOSELY MONITOR. ...KIBLER NEXT ADVISORY: WILL BE ISSUED BY 2005JUL21/2245Z NNNN