This stratovolcano erupted in 1980 in the United States. Although there were warnings of its impending eruption, it still killed dozens, partly because it first blew sideways, producing a monstrous landslide. This volcano is Choose one: Mt. St. Helens. Surtsey. Yellowstone. Mt. Rainier.

Option: Mt. St. Helens.

Explanation:

Mount St. Helens is a stratovolcano found in Skamania County Washington. The volcano recognised for its ash discharges and volcanic materials. Mount St. Helen's eruption in 1980 considered to be the most dangerous and economically devastating volcanic disaster in America. Fifty-seven people killed, and homes, bridges, highway, and railways destroyed. The massive avalanche triggered the earthquake that caused the volcano to explode.