FVXX21 KWBC 310000 VOLCANIC ASH ADVISORY ISSUED: 2002DEC31/0000Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2002/540 INFORMATION SOURCE: GOES-8 IMAGERY. GUAYAQUIL MWO SIGMET. ERUPTION DETAILS: ERUPTION AT 30/1644Z. OBS ASH DATE/TIME: NIL. OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. FCST ASH CLOUD +6H: SEE SIGMETS REMARKS: THE ASH OBSERVED EARLIER HAS DISSIPATED. KARST NEXT ADVISORY: NO FURTHER ADVISORIES. NNNN