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The Cascades Volcano Observatory is part of the USGS, a scientific agency of the United States government. [5] It is located in Vancouver, Washington in the Portland, Oregon metropolitan area. Monitored volcanoes
By volume, the two largest Cascade Volcanoes are the broad shields of Medicine Lake Volcano and Newberry Volcano, which are about 145 and 108 cubic miles (600 and 450 km 3) respectively. Glacier Peak is the only Cascade Volcano that is made exclusively of dacite. The history of the Cascade Volcanoes can be separated into three major chapters ...
Additionally, the Scientist in Charge at Cascades Volcano Observatory, Jon Major, is holding a talk at the Alberta Rose Theatre in Portland on May 22. Tickets are required.
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 ...
David A. Johnston Archived February 15, 2013, at the Wayback Machine (United States Geological Survey obituary, hosted by the Cascades Volcano Observatory) David Alexander Johnston – memoriam article by Wes Hildreth – includes 1978 photograph of Johnston (USGS Geological Survey Circular 838, hosted by the US National Park Service)
[32] [33] Seismic activity is monitored by the USGS Cascades Volcano Observatory in Vancouver, Washington, which issues weekly updates (and daily updates if significant eruptive activity is occurring at a Cascades volcano). [34]
Beginning in 2001, the Cascades Volcano Observatory conducted field surveys and installed two new monitoring stations near the Three Sisters, including a GPS station and seismometer at The Husband, a peak west of the Three Sisters. In 2004, this seismometer detected an earthquake swarm in the area of uplift. [74]
In October 2006, the United States Geological Survey (USGS) adopted a nationwide alert system for characterizing the level of unrest and eruptive activity at volcanoes. The system is now used by the Alaska Volcano Observatory, the California Volcano Observatory (California and Nevada), the Cascades Volcano Observatory (Washington, Oregon and Idaho), the Hawaiian Volcano Observatory and the ...