On October 1, 2004, an explosion in the crater of Mount St. Helens sent ash and water vapor several thousand feet into the air. It was the dramatic beginning of an eruption that continued for the next 3+ years. The explosion fractured Crater Glacier and hurled rocks for at least one-half mile across the western half of the glacier and the 1980-1986 lava dome.
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October 1, 2004 Explosion at Mount St. Helens
On October 1, 2004, an explosion in the crater of Mount St. Helens sent ash and water vapor several thousand feet into the air. It was the dramatic beginning of an eruption that continued for the next 3+ years. The explosion fractured Crater Glacier and hurled rocks for at least one-half mile across the western half of the glacier and the 1980-1986 lava dome.
PubTalk 9/2003 — Beneath Crater Lake
An underwater volcanic landscape tells a complex tale
by Charles R. Bacon, Geologist
Visualizations presented by David W. Ramsey, Geologist
An underwater volcanic landscape tells a complex tale
by Charles R. Bacon, Geologist
Visualizations presented by David W. Ramsey, Geologist
PubTalk 6/2002 — Finding Elusive Earthquake Faults
New Mapping Techniques Reveal Potential Seismic Sources Beneath Seattle
By Richard J. Blakely, Geophysicist and Ralph A. Haugerud, Geologist
New Mapping Techniques Reveal Potential Seismic Sources Beneath Seattle
By Richard J. Blakely, Geophysicist and Ralph A. Haugerud, Geologist
Crater Lake, Oregon, Fly-by Animation
Fly-by of shaded-relief bathymetry and surrounding mountains of Crater Lake Oregon. The colored region is the lake floor whereas the gray region shows the surrounding mountains. The lake is approximately 9-km wide east to west.
Fly-by of shaded-relief bathymetry and surrounding mountains of Crater Lake Oregon. The colored region is the lake floor whereas the gray region shows the surrounding mountains. The lake is approximately 9-km wide east to west.
Mount St. Helens 1980 Ash Cloud as Seen From Space
Eruptive activity at Mount St. Helens captured the world’s attention on May 18, 1980 when the largest historical landslide on Earth and a powerful explosion reshaped the volcano. A volcanic ash cloud spread across the US in 3 days, and encircled the Earth in 15 days.
Eruptive activity at Mount St. Helens captured the world’s attention on May 18, 1980 when the largest historical landslide on Earth and a powerful explosion reshaped the volcano. A volcanic ash cloud spread across the US in 3 days, and encircled the Earth in 15 days.