When the erruption of Mt. Saint Helens happened people reported seeing ash clouds as far as California going west and east as far as Wisconsin and south to Utah, Colorado, and Wyoming. This all factored to the way the wind was blowing which sent clouds of ash and soot blowing for miles and being spotted in different states.
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57 people were killed as a direct result of the 1980 eruption of Mount St. Helens.
Mount St. Helens in Washington state had a powerful eruption on May 18, 1980.
There were a total of 57 confirmed fatalities directly caused by the eruption of Mount St. Helens in 1980.
The major cities affected by the eruption of Mount St. Helens in 1980 were Spokane, Seattle, and Portland. The eruption caused significant ashfall, disrupted air travel, and impacted the local economies of these cities.
The 1980 eruption of Mount St Helens was a VEI 5.