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The David A. Johnston Cascades Volcano Observatory (CVO) is a volcano observatory in the US that monitors volcanoes in the northern Cascade Range. It was established in the summer of 1980, after the eruption of Mount St. Helens . [ 2 ]
The center is at 19000 Spirit Lake Highway, in Toutle, at milepost 43 on State Highway 504. ... Additionally, the Scientist in Charge at Cascades Volcano Observatory, Jon Major, is holding a talk ...
Dee Wright Observatory is an observation structure at the summit of McKenzie Pass in the Cascade Mountains of Oregon. The structure is an open shelter constructed with lava stone. It is located in the midst of a large lava flow, and offers an exceptional view of numerous Cascade peaks.
Gardner at Mount St. Helens in 2004. Cynthia A. Gardner is an American geologist and volcanologist noted for her work on Mount St. Helens. [1] [2] She was the acting Scientist-in-Charge (SIC) of the Cascades Volcano Observatory during the 2004 volcanic reawakening at Mount St. Helens, and officially served as SIC from 2005 to 2010—the first female to fill the role. [3]
Montgomery-Brown, an expert on the Long Valley Caldera who is now with the USGS' Cascades Volcano Observatory, said the most recent episode of increased earthquake activity in the area began in ...
More than 400 earthquakes have been detected beneath Washington's Mount St. Helens in recent months, though there are no signs of an imminent eruption, according to the U.S. Geological Survey.
After successfully using seismic activity to predict the 1980 Mt. St. Helens eruption, monitoring was expanded to other Cascade Mountains volcanoes. The PNSN, in conjunction with the Cascades Volcano Observatory of the USGS, now monitors seismicity at all the Cascade volcanoes in Washington and Oregon.
The Cascade volcanoes have had more than 100 eruptions over the past few thousand years, many of them explosive eruptions. [21] However, certain Cascade volcanoes can be dormant for hundreds or thousands of years between eruptions, and therefore the great risk caused by volcanic activity in the regions is not always readily apparent.
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