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Panoramic photograph from the southern rim of Mount St. Helens' cra...
July 27, 2006

Panoramic photograph from the southern rim of Mount St. Helens' cra...

Panoramic photograph from the southern rim of Mount St. Helens' crater rim looking north with accompanying annotation.

May 31, 2006

Mount St. Helens: Instrumentation and Dome Growth, April-May 2006

The first priority of any eruption is to assess current status and what might happen next. To accomplish this, Mount St. Helens became one of most heavily monitored volcanoes. At the start of the 2004–08 eruption, 13 permanent seismic stations operated within about 12 miles of Mount St. Helens. By the end of the eruption, the seismic network consisted of 20 stations.

May 31, 2006

Mount St. Helens: Instrumentation and Dome Growth, May-Sept 2006

Throughout the eruption, scientists installed monitoring stations to track volcanic activity, deployed temporary monitoring ""spiders"", monitored the temperature of lava spines and created time-lapse of dome growth. During the 3+ years of the eruption, lava piled up to form a new dome 460 m (1,500 ft) high. The 92 million cubic meters (121 million cubic yards, or 36,800

Helicopter flying toward lava spine at Mount St. Helens to collect ...
April 28, 2006

Helicopter flying toward lava spine at Mount St. Helens to collect ...

Helicopter flying toward lava spine at Mount St. Helens to collect rocks—note the "Jaws" collector hanging underneath. April 28, 2007

Map of the known ash-fall boundaries for several U.S. eruptions
December 31, 2005

Map of the known ash-fall boundaries for several U.S. eruptions

Eruptions of the Yellowstone volcanic system have included the two largest volcanic eruptions in North America in the past few million years; the third largest was at Long Valley in California and produced the Bishop ash bed. The biggest of the Yellowstone eruptions occurred 2.1 million years ago, depositing the Huckleberry Ridge ash bed. These eruptions left behind huge

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Mount Adams, Washington as seen from Mount St. Helens (west). Tree...
December 6, 2005

Mount Adams, WA as seen from Mount St. Helens (west). Trees are co...

Mount Adams, Washington as seen from Mount St. Helens (west). Trees are covered in frost in the foreground.

October 31, 2005

Mount St. Helens' Crater Glacier's response to lava dome growth

From 2005 to 2010, the U.S. Geological Survey-Cascades Volcano Observatory operated a remote camera on the northwest flank of Mount St. Helens. Looking into the crater, the camera captured hourly photographs of volcanic dome growth during the 2004-2008 eruption. The station also captured the advance of the west arm of Crater Glacier as it moved northeast around the 1980-

September 30, 2005

Mount St. Helens: Instrumentation and Dome Growth, Sept 2005-Feb 2006

Events that occurred in the crater during the 2004–2008 eruption were recorded by a network of seven remote, telemetered digital single-lens reflex (DSLR) cameras installed on the crater floor and rim. The resulting time lapse images constitute a valuable and visually compelling record of dome growth and the resulting response of Crater Glacier. The fixed cameras that

Loowit Falls flows north out of Mount St. Helens crater. White buil...
August 26, 2005

Loowit Falls flows north out of Mount St. Helens crater. White buil...

Loowit Falls flows north out of Mount St. Helens crater. White building in upper right corner is the Loowit gage house, which contains an Acoustic Flow Monitor.

South-facing aerial view of Mount St. Helens with Mount Hood (left)...
June 8, 2005

South-facing Mount St. Helens with Mount Hood and Mount Jefferson o...

South-facing aerial view of Mount St. Helens with Mount Hood (left) and Mount Jefferson (right) on the horizon. June 8, 2005.