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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 ]
A volcano observatory is an institution that conducts research and monitoring of a volcano. Each observatory provides continuous and periodic monitoring of the seismicity , other geophysical changes, ground movements, volcanic gas chemistry, and hydrologic conditions and activity between and during eruptions .
Recent drilling into the Pemberton Valley bed encountered remnants of a debris flow that had traveled 50 km (31 mi) from the volcano shortly before it last erupted 2,350 years ago. About 1,000,000,000 cubic metres (0.24 cu mi) of rock and sand extended over the width of the valley.
USGS Cascades Volcano Observatory geophysicist Rebecca Kramer works on station PR05, part of the Mount Rainier lahar detection network. The system has been upgraded and expanded since it was first ...
It is monitored by the Pacific Northwest Seismic Network and the Cascades Volcano Observatory via a seismic station on the southwest flank of the mountain. [47] During the month of September of 2024, the U.S. Geological Survey Cascades Volcano Observatory recorded six earthquakes ranging in magnitudes 0.9 to 2.0. With a normal rate of one ...
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 network was significantly expanded after the damaging 2001 Nisqually earthquake. After an earthquake on January 30, 2009, the network's emergency notification system failed. [1]
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