FVXX20 KWBC 251738 VOLCANIC ASH ADVISORY ISSUED: 2002FEB25/1738Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M). . ADVISORY NUMBER: 2002/093 . INFORMATION SOURCE: GOES-8 IMAGERY. GUAYAQUIL MWO SIGMET. GEOPHYSICAL INSTITUTE. AVIATION MODEL WIND FORECAST. . ERUPTION DETAILS: ASH OBSERVED AT 24/1650Z. . OBS ASH DATE/TIME: 24/1650Z MOVING NW 15-20 KNOTS. . OBS ASH CLOUD: SFC/FL240 ASH NOT IDENTIFIABLE FROM SATELLITE DATA. . FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: THE GEOPHYSICAL INSTITUTE OBSERVED VOLCANIC ASH OVER THE VOLCANO AT 1650Z AND UP TO FL240. NO ASH WAS DETECTED IN SATELLITE IMAGERY THROUGH 1715Z. . NEXT ADVISORY: WILL BE ISSUED BY 2002FEB25/2330Z. . NNNN