FVXX20 KWBC 232345 VOLCANIC ASH ADVISORY ISSUED: 2002SEP23/2345Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2002/457 . INFORMATION SOURCE: GOES-8 IMAGERY. GEOPHYSICAL INSTITUTE. GUAYAQUIL MWO SIGMET. LOCAL SURFACE OBSERVATIONS. . ERUPTION DETAILS: EXHALATION AT 23/1908Z TO FL230 . OBS ASH DATE/TIME: 23/2145Z . OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL230 MOVING SW 15KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: AS OF 23/2315Z ASH HAD BECOME TO THIN TO BE DETECTED. PREVIOUS VISIBLE IMAGERY AT 2145Z SHOWED A THIN PLUME TO THE WEST SOUTHWEST OF THE SUMMIT. PREVIOUS MULTISPECTRAL IMAGERY AT 2245 SHOWED A FAINT PLUME EXTENDING FROM THE SUMMIT TO S0154WO7915 WITH MAXIMUM WIDTH OF 30KM. . NEXT ADVISORY: WILL BE ISSUED BY 24/0530Z. . NNNN