FVXX20 KWBC 071730 VOLCANIC ASH ADVISORY . ISSUED: 2002APR07/1730Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S07826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2002/200 . INFORMATION SOURCE: GOES-8 IMAGERY. GUAYAQUIL MWO SIGMET. GEOPHYSICAL INSTITUTE. . ERUPTION DETAILS: PROBABLE STEAM AND ASH EMISSION AT 07/1615Z. . OBS ASH DATE/TIME: 07/1615. . OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/250 MOVING NORTHWEST AROUND 10 KNOTS. . FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: THE GEOPHYSICAL INSTITUTE REPORTS AN INCREASE IN SEISMIC ACTIVITY BUT DUE TO CLOUDS ARE UNABLE TO VERIFY BUT BELIEVE THAT THERE MAY BE A NEAR SUMMIT EMISSION OF STEAM AND A LITTLE ASH. SATELLITE IMAGERY THROUGH 1645Z SHOWS BROKEN CLOUDS AND NO DETECTION OF ASH. . NEXT ADVISORY: WILL BE ISSUED BY 2002APR07/2330Z. . NNNN