FVXX22 KWBC 171923
VOLCANIC ASH ADVISORY
ISSUED: 2003APR17/1930Z   VAAC: WASHINGTON

VOLCANO: GUAGUA PICHINCHA  1502-02
LOCATION: S0011W07836    AREA: ECUADOR
                              
SUMMIT ELEVATION: 15695 FT (4784 M)

ADVISORY NUMBER: 2003/001
 
INFORMATION SOURCE: GUAYAQUIL MWO SIGMET. GEOPHYSICAL INSTITUTE.
GFS MODEL WINDS FORECAST.

ERUPTION DETAILS: SEISMIC SIGNALS AT 1830Z.
 
OBS ASH DATE/TIME: NIL.
 
OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS
FL100/FL180 MOVING SW 5 KNOTS.

FCST ASH CLOUD +6H: SEE SIGMETS.
 
REMARKS: THE GEOPHYSICAL INSTITUTE HAS INDICATED THAT THERE ARE
SEISMIC SIGNALS FOR AN ERUPTION OF GUAGUA PICHINCHA AT 1830Z. 
HOWEVER THE VOLCANOLOGIST ON DUTY INDICATED THAT THERE HAVE NOT
BEEN ANY VISUAL SIGNS OF ASH AND THAT THE SEISMIC SIGNALS WOULD
ONLY SUPPORT A VERY WEAK ERUPTION WHERE THE ASH WOULD MOST LIKELY
NOT HAVE EVEN BEEN EXPELLED FROM THE SUMMIT RIM.  THE GEOPHYSICAL
INSTITUTE HAS INDICATED THAT THESE SIGNALS HAVE BEEN OCCURRING
SPORADICALLY OVER THE PAST FEW DAYS...MOST LIKELY ACCOMPANIED BY
STEAM AND OUT-GASSING.  THIS MESSAGE IS A HEADS-UP TO INDICATE
THAT GUAGUA HAS BEEN ACTIVE RECENTLY AND THE POTENTIAL FOR ASH
CLOUDS IS POSSIBLE. THIS WILL BE THE LAST MESSAGE UNLESS A MORE
SIGNIFICANT ERUPTION OCCURS OR ASH IS VISUALLY SEEN EITHER ON
SATELLITE IMAGERY OR BY VOLCANOLOGISTS NEAR THE SUMMIT...GALLINA  

NEXT ADVISORY: NO FURTHER ADVISORIES 

NNNN