FVXX20 KNES 310331
VOLCANIC ASH ADVISORY
ISSUED: 2005MAY31/0330Z   VAAC: WASHINGTON

VOLCANO: ANATAHAN 0804-20
LOCATION: N1621E14540   AREA: MARIANA.ISLANDS

SUMMIT ELEVATION: 2585 FT (788 M)

ADVISORY NUMBER: 2005/346

INFORMATION SOURCE: GFS MODEL WINDS. RADIOSONDE.
GOES-9. USGS. 

ERUPTION DETAILS: CONTINUOUS EMMISSION OF ASH AND
GASES

OBS ASH DATE/TIME: 31/0225Z

OBS ASH CLOUD: SFC/FL140 15NM WIDE LINE BETWEEN
N1653E14323 - N1618E14542. ASH IS MOVING W 10
KNOTS. 

FCST ASH CLOUD +6H: 31/0830Z SFC/FL140 20NM WIDE
LINE BETWEEN N1710E14211 - N1617E14543. 

FCST ASH CLOUD +12H: 31/1430Z SFC/FL140 20NM WIDE
LINE BETWEEN N1641E14254 - N1617E14544. 

FCST ASH CLOUD +18H: 31/2030Z SFC/FL140 20NM WIDE
LINE BETWEEN N1649E14239 - N1615E14546. 

REMARKS: THE SEISMIC REPORT AND IMAGERY BOTH SHOW
A LESS VIGOROUS ERUPTION.  THE PLUME CONTINUES TO
EXTEND WEST NORTHWEST FROM THE ISLAND AROUND 130
NM.    ...SWANSON

NEXT ADVISORY: WILL BE ISSUED BY 2005MAY31/0930Z

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