FVXX20 KNES 210617
VOLCANIC ASH ADVISORY
ISSUED: 2005JUN21/0617Z   VAAC: WASHINGTON

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

SUMMIT ELEVATION: 2585 FT (788 M)

ADVISORY NUMBER: 2005/438

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

ERUPTION DETAILS: CONTINUOUS EMISSION OF ASH AND
GASSES. 

OBS ASH DATE/TIME: 21/0525Z

OBS ASH CLOUD: SFC/FL100 40NM WIDE LINE BETWEEN
N1629E14029 - N1621E14543. ASH IS MOVING W 20-25
KNOTS. SFC/FL100 40NM WIDE LINE BETWEEN
N1827E13924 - N1641E13904. ASH IS MOVING W 20-25
KNOTS. 

FCST ASH CLOUD +6H: 21/1130Z SFC/FL100 40NM WIDE
LINE BETWEEN N1647E14055 - N1620E14543. 

FCST ASH CLOUD +12H: 21/1730Z SFC/FL100 40NM WIDE
LINE BETWEEN N1622E14542 - N1619E14352 -
N1541E14058. 

FCST ASH CLOUD +18H: 21/2330Z SFC/FL100 40NM WIDE
LINE BETWEEN N1622E14050 - N1619E14541. 

REMARKS: THE CONTINUOUS PLUME FROM THE VOLCANO
EXTENDS WEST AROUND 300 NMI.  THERE IS A FAINT
AREA OF ASH ROUGHLY 400 NM  WEST NORTHWEST OF THE
VOLCANO THAT WILL DISSIPATE IN THE NEXT FEW HOURS.
 THE SEISMICITY  CONTINUES TO BE REPORTED AS
FAIRLY HIGH.  ...SWANSON

NEXT ADVISORY: WILL BE ISSUED BY 2005JUN21/1215Z

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