Mount St. Helens on May 17, 1980, one day before the devastating eruption. The view is from Johnston's Ridge, 6 miles (10 kilometers) northwest of the volcano. Photo is courtesy of the United States Geological Survey.
This is Mount St. Helens during the eruption on May 18, 1980. Note the violence of the eruption in contrast with the quiet countryside. Mount Adams can be seen in the background to the right. Photo is courtesy of the United States Geological Survey.
After the May 18, 1980 eruption, the elevation of Mount St. Helens was only 8,364 feet, and the volcano had a mile-wide horseshoe-shaped crater that is seen here from the northwest. Photo is courtesy of the USGS Cascade Volcano Observatory.