FVXX20 KWBC 171940 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1940 UTC 17 NOV 1999 BY THE WASHINGTON VAAC . GUAGUA PICHINCHA 99-093 ECUADOR 0.17S 78.60W . BACKGROUND: GUAGUA PICHINCHA ECUADOR (1502-02) SUMMIT HEIGHT 15695 FT (4784 M) . SOURCES OF INFORMATION: GEOLOGICAL PERSONNEL IN QUITO...GOES-8 VISIBLE AND MULTISPECTRAL IMAGERY. UPPER AIR WIND REPORTS FROM THE INSTITUTO GEOFISICO IN QUITO. . ERUPTION DETAILS: THE GEOFISICO INSTITUTO REPORTED A MAJOR ERUPTION AROUND 17/1920 UTC. THE REPORT WAS BASED ON SEISMIC ACTIVITY. . DETAILS OF ASH CLOUD: GOES-8 IMAGERY IS NOT YET AVAILABLE AFTER THE ERUPTION. A DESCRIPTION OF ASH WILL BE FORTHCOMING IN THE NEXT STATEMENT. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL250 WOULD MOVE TOWARD THE SOUTH OR SOUTH-SOUTHWEST AT 10 TO 15 KT. ASH FROM FL250 TO FL450 WOULD MOVE TOWARD THE SOUTHWEST OR WEST-SOUTHWEST AT 20 TO 35 KT. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH ADVISORY STATEMENTS 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/) . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED AS SOON AS MORE INFORMATION BECOMES AVAILABLE. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . RUMINSKI . NNNN