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_cropped.JPG) Front of the main building of the David A. Johnston Cascades Volcano Observatory | |
| Agency overview | |
|---|---|
| Formed | 1980 |
| Headquarters | Vancouver, Washington, USA |
| Agency executive |
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| Website | https://www.usgs.gov/observatories/cvo |
TheDavid A. Johnston Cascades Volcano Observatory (CVO) is avolcano observatory in the US that monitors volcanoes in the northernCascade Range. It was established in the summer of 1980, after the eruption ofMount St. Helens.[2] The observatory is named forUnited States Geological Survey (USGS) volcanologistDavid A. Johnston, who was killed by the1980 eruption of Mount St. Helens.[3] The observatory's current territory coversOregon,Washington, andIdaho. The Cascade Range's extent includes northernCalifornia, and Cascade volcanoes in that state, such asMount Shasta andLassen Peak, previously fell under the CVO's jurisdiction. However, these volcanoes now fall under the jurisdiction of theCalifornia Volcano Observatory (CalVO), formed in February 2012 and based inMenlo Park, California, which monitors and researches volcanic activity throughout California andNevada.[4]
The Cascades Volcano Observatory is part of the USGS, a scientific agency of theUnited States government.[5] It is located inVancouver, Washington in thePortland, Oregon metropolitan area.
This list shows volcanoes currently monitored by the Cascades Volcano Observatory, which range in order of highest to lowest risk assessment.
According to the USGS risk assessment of volcanoes located in the northern Cascades region, the following volcanoes were ranked "very high threat potential".[6]
The following volcanoes were ranked "high threat potential":[6]
The following volcanoes were ranked "moderate threat potential":[6]
The following volcanoes were ranked "Low to Very Low Threat Potential":[6]
There are other volcanoes in the northern Cascades region that have not been assessed one of these risk levels which warrant monitoring. Volcanoes that have not erupted during theHolocene period were not included. USGS has noted, though less probable, that it is still possible for volcanoes to erupt at longer intervals than mentioned.[6] CVO also does not monitor underwater volcanoes such asAxial Seamount off the coast of Oregon, because underwater volcanoes in the region pose "no threat to people or ocean travel" and "USGS focuses its effort on volcanoes that pose a threat to life and property".[7]
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45°36′39″N122°29′48″W / 45.61083°N 122.49667°W /45.61083; -122.49667
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