The Mount Saint Helens Volcano in Washington state is showing signs of unrest, as magma and gasses were confirmed to be moving underneath its edifice. This has generated a series of more than 100 earthquakes, which have been detected by seismographs. These earthquakes are largely centered beneath the lava dome formed from 2004 to 2008, meaning that the next eruption is likely to occur in the same location. So, is an eruption likely? What is the context of these earthquakes? This video will answer these two questions, and discuss what might happen next at this volcano.

Pacific Seismic Network Seismograms:
https://pnsn.org/seismograms/map

Mount Saint Helens Earthquake Map:
https://pnsn.org/volcanoes/mountsth...

Current Volcanic Gas Levels:
https://www.usgs.gov/volcanoes/mount...

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Graphics of eruption dates are courtesy of the Global Volcanism Program, Smithsonian Institute. https://volcano.si.edu/

Thumbnail Photo Credit: antonystanley, Flickr, CC BY SA 2.0
Note: This photo was cropped from its original image.
Source: https://www.flickr.com/photos/antonys...

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0:00 Mount Saint Helens Earthquake Swarm
0:39 Background Information
1:18 Magma Chambers
2:02 Earthquake Cause
2:34 Negative Magnitude Earthquakes
3:21 Future Eruption

Google Earth imagery used in this video: ©Google & Data Providers

CC BY SA 2.0 license: https://creativecommons.org/licenses/...