• Stream Info. Go to Chat & Listen to hear it!

    Currently Playing: Loading ...
    Station time:
  • iTunes TuneIn

Earthquake Swarm Continues at Mount St. Helens

LNM Radio Network

LNM Radio Network

Beginning March 14, 2016, a number of small magnitude earthquakes have occurred beneath Mount St. Helens, at a depth between 2 and 7 km (1.2 to 4 miles). Over the last 8 weeks, there have been over 130 earthquakes formally located by the Pacific Northwest Seismic Network and many more earthquakes too small to be located. The earthquakes have low magnitudes of 0.5 or less; the largest a magnitude 1.3. Earthquake rates have been steadily increasing since March, reaching nearly 40 located earthquakes per week. These earthquakes are too small to be felt at the surface.
The earthquakes are volcano-tectonic in nature, indicative of a slip on a small fault. Such events are commonly seen in active hydrothermal and magmatic systems.
https://volcanoes.usgs.gov/observatories/cvo/