Mount St. Helens hit by more than 70 earthquakes since New Years Day
Mount St. Helens is rumbling again, experiencing more than 70 earthquakes since New Years Day and aftershocks continuing every few hours. The seismic swarm largest quake – a M3.9 tremor – struck 5 miles from the active stratovolcano located in Skamania County, Washington, in the Pacific Northwest region of the United States.
The USGS reports that the M3.9 earthquake to the northeast of Mount St. Helens is aligned with regional stress as opposed to the localized Mount St. Helen’s stress axis, thus, they do believe this earthquake is related to the nearby volcano.
It is common to experience swarms of earthquakes at Mount St. Helens. The recent earthquakes appear to be both from regional stress (i.e. not related to the volcano) and from the volcano itself.