UDW on Instagram: "On May 18, 1980, Mount St. Helens in Washington erupted in one of the most powerful volcanic events in U.S. history. The eruption began with a massive landslide that removed the mountain’s northern flank, triggering a huge explosion. Ash and gas shot miles into the sky, and a fast-moving avalanche of hot debris destroyed everything in its path. The eruption lowered the mountain’s height by hundreds of feet and left a large horseshoe-shaped crater. This event caused 57 deaths a