FVXX23 KNES 180701 VOLCANIC ASH ADVISORY ISSUED: 20070318/0700Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128 W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2007/101 INFORMATION SOURCE: GOES-12. GFS WINDS. INFRASOUND DETECTION. SIGMET ERUPTION DETAILS: ONGOING EMISSIONS OBS ASH DATE/TIME: 18/0345Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL230 MOVING TO W 2-15 KNOTS. FCST ASH CLOUD +6H: 18/1000Z FCST ASH CLOUD +12H: 18/1600Z FCST ASH CLOUD +18H: 18/2200Z REMARKS: NO ASH CAN BE SEEN IN NIGHT IMAGERY ALTHOUGH IT IS POSSIBLE THAT LOW LEVEL WEATHER CLOUDS MIGHT BE HINDERING ASH DETECTION. A HOTSPOT WAS OBSERVED AT 0045Z. IN THE PAST DAY THERE HAS BEEN A RELATIVE DECREASE IN THE NUMBER AND MAGNITUDE OF INTENSE EXPLOSIONS OBSERVED BY INFRASONIC DETECTION. THE MOST RECENT KNOWN ASH OBSERVATION WAS AT 18/01Z WHEN THE GEOPHYSICAL INST OBSERVED WESTWARD MOVING ASH TO FL230. ... NEXT ADVISORY: WILL BE ISSUED BY 20070318/1300Z