The May 18, 1980 eruption caused a massive debris avalanche, reducing the elevation of the mountain's summit from 9,677 feet to 8,365 feet and
replacing it with a 1 mile wide horseshoe shaped crater seen in this image. The eruption was the deadliest destructive volcanic event
in the history of the United States. Mt. St. Helens remains an active volcano.

This is the last and belated image in this Pacific Northwest gallery.