Seismic station installation in Mount St. Helens's crater 1982

Seismic station installation in Mount St. Helens's crater 1981 lava...

Detailed Description

The U.S. Geological Survey, in conjunction with the University of Washington, maintain seismic stations at Mount St. Helens. An increase in seismicity (earthquakes) is often the first precursor to an approaching eruption.

Details

Image Dimensions: 2958 x 1963

Date Taken: