FVXX20 KWBC 201435 VOLCANIC ASH ADVISORY ISSUED: 2002FEB20/1435Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M). . ADVISORY NUMBER: 2002/086 . INFORMATION SOURCE: GOES-8 IMAGERY. AVN MODEL WINDS FORECAST. GEOPHYSICAL INSTITUTE. GUAYAQUIL MWO SIGMET . ERUPTION DETAILS: ERUPTION AT 21/1253Z. . OBS ASH DATE/TIME: 21/1415Z . OBS ASH CLOUD: SFC/FL230 0128S7826W-0132S7841W MOVING SOUTHWEST AT 15 TO 20 KNOTS. . FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: ASH VERY FAINT. . NEXT ADVISORY: WILL BE ISSUED BY 2002FEB21/2030Z. . NNNN