Mount St. Helens Eruption - May 18, 1980 8;32 am
(left) Jim Valance, Cascades Volcano Observatory, U.S. Geological Survey (right)
The Initial Blast (right) The mushroom cloud of volcanic ash produced by the eruption, as seen from Toledo, Washington, 35 miles away. The cloud was roughly 40 miles wide and 15 miles high.
Ash cloud as seen from space (below)
from Weather Satellite GOES-3 at 1545 UTC
Sequence of events on May 18