FVXX20 KWBC 140615 VOLCANIC ASH ADVISORY ISSUED: 2004APR14/0614Z VAAC: WASHINGTON VOLCANO: ANATAHAN 0804-20 LOCATION: N1621E14540 AREA: MARIANA.ISLANDS SUMMIT ELEVATION: 2585 FT (788 M) ADVISORY NUMBER: 2004/001 INFORMATION SOURCE: GFS MODEL WINDS FORECAST. GOES-9 IMAGERY. USGS. ERUPTION DETAILS: USGS REPORTS ONGOING ACTIVITY AS WELL AS AN INCREASE IN SEISMIC ACTIVITY AT ABOUT 0440Z OBS ASH DATE/TIME: 14/0440Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL030 MOVING TO NW 10 KNOTS. FCST ASH CLOUD +6H: NOT AVBL FCST ASH CLOUD +12H: NOT AVBL FCST ASH CLOUD +18H: NOT AVBL REMARKS: CORRECTION OF VOLCANO LATITUDE USGS IS MONITORING SEISMIC ACTIVITY AND REPORTED A BRIEF INCREASE IN ACTIVITY AT ABOUT 0440Z. NO ASH CAN BE SEEN IN SATELLITE IMAGERY THROUGH 0413Z BUT CLOUDS IN THE AREA COULD BE HAMPERING ASH DETECTION. ... NEXT ADVISORY: WILL BE ISSUED BY 2004APR14/1215Z NNNN