May 18, 1980 After month of powerful seismic changes, Mount St. Helens erupted with an explosion that redefined the landscape for hundreds of miles.

From the KGWTV broadcast archives, this account takes viewers through the eruption momentbymoment as it happened, using the radio reports of spotters who were on the mountain that day.

Viewers will also see the firstever images from the area after the blast and the rescue effort to try to find victims.

More here: kgw.com/msh