Eruption of Mount St. Helen’s
At 8:32 a.m. on May 18, 1980, all the rumblings, the trembling, the minor earthquakes, the bulges in the mountain and the occasional venting of steam led to an enormous eruption that generated the thermal energy equal to 26 megatons of TNT, hurled ash 15 miles into the air, killed 57 people and caused more than $1 billion in damage.
