On May 18, 1980, 30-year-old scientist David Johnston was in an observation post with the U.S. Geological survey monitoring Mount St. Helens. At 8:32 a.m., a 5.1 magnitude earthquake struck beneath ...
The largest landslide in recorded history led to one of the most devastating volcanic eruptions in modern times. Mount St. Helens forever changed the landscape in its corner of western Washington when ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results