FVXX20 KWBC 121600 VOLCANIC ASH ADVISORY ISSUED 1600 UTC 12 JUL 2000 BY THE WASHINGTON VAAC . GUAGUA PICHINCHA 00-170 ECUADOR 0011S 7836W . BACKGROUND: GUAGUA PICHINCHA ECUADOR (1502-02) SUMMIT HEIGHT 15695 FT (4784 M) . SOURCES OF INFORMATION: GEOPHYSICAL INSTITUTE...GOES 8 VISIBLE...INFRARED AND MULTISPECTRAL SATELLITE IMAGERY...AVIATION MODEL WIND FORECASTS . ERUPTION DETAILS: EMISSIONS OF STEAM AND ASH AT 07/1351 UTC. . DETAILS OF ASH CLOUD: THE GEOPHYSICAL INSTITUTE BELIEVED THAT AN ERUPTION OF GUAGUA PICHINCHA HAD OCCURRED AROUND 1453 UTC BASED ON SEISMIC DATA. HOWEVER NO PLUME WAS OBSERVED FROM THE VANTAGE POINT OF THE OBSERVATORY IN QUITO LOCATED TO THE EAST OF THE SUMMIT. SATELLITE DATA THROUGH 1515 UTC ALSO PROVIDED NO INDEPENDENT CONFIRMATION OF AN ASH PLUME. IT IS THEREFORE BELIEVED THAT ANY ASH CLOUD THAT MIGHT HAVE RESULTED FROM THE SEISMIC ACTIVITY WAS LIMITED TO NEAR THE SUMMIT LEVEL. TRAJECTORY: ANY ASH THAT MIGHT EXIST BETWEEN THE SUMMIT AND FL200 WOULD MOVE TOWARDS THE WEST AT 10 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . NO FURTHER STATEMENTS WILL BE ISSUED UNLESS ADDITIONAL INFORMATION BECOMES AVAILABLE. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH ADVISORIES OFTEN ACCOMPANIED BY A MAP DEPICTING ASH LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS http://www.ssd.noaa.gov/VAAC/washington.html (all lower case except /VAAC/) . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . TURK/FERRARO/CLARK . NNNN