The main Mount Saint Helens eruption was on May 18, 1980. These images are from July 22, during a large eruption after the big one. These images were given to me by a relative who found them at their workplace. I do not believe they have ever been scanned and placed on the internet. Enjoy.

Mt. Saint Helens Eruption - June 22, 1980

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The 3 below look like pre-eruption images
The 3 below look like pre-eruption images