Johnston Ridge Observatory
24000 Spirit Lake Highway
P.O. Box 326
Toutle, WA 98649
VolcanoCam Movies Archive
Eruption Event Movie - October 01, 2004
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Below the Flash movie may be a copy of the press release as issued the same
day by the U.S. Geological Survey, Cascades Volcano Observatory, Vancouver,
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(As issued by the U.S. Geological Survey, Vancouver, Washington
University of Washington, Pacific Northwest Seismograph Network, Seattle, Washington)
Shortly before Noon today, Mount St. Helens emitted a plume of steam
and minor ash from an area of new crevasses in the crater glacier south
of the 1980-86 lava dome. The event lasted from 11:57 to 12:21 PDT and
created a pale-gray cloud that reached an altitude of about 9,700 feet
(from pilot reports).
It drifted southwestward, where nearby residents should receive no
more than a minor dusting of ash. USGS scientists making thermal measurements
witnessed the emission and noted that the clouds were not particularly
hot. Blocks of rock and ice ejected by the event fell in the crater and
rim areas. The emission was accompanied by an abrupt drop in seismicity,
which remains at low levels.