Digital elevation map of Mount St. Helens showing the epicenter of ...
By Volcano Hazards Program
1905 (approx.)

Detailed Description
Digital elevation map of Mount St. Helens shows the epicenter of earthquakes from 2008 to 2014. Earthquakes are shown as filled round circles. Circle size reflects earthquake magnitude. White triangles represent seismometer locations.
Sources/Usage
Public Domain.
S. Moran