ORMOUS 🌒 on Instagram: "May 18, 1980. The Dramatic Eruption of the Mount St. Helens Volcano. It is the deadliest and most economically destructive volcanic eruption in U.S. history. The magnitude of this powerful eruption was 5 on the VEI scale. 57 people died due to the eruption, and 25 houses, 47 bridges, 24 kilometers of railway tracks, and 300 kilometers of highways were destroyed. The eruption caused a massive debris avalanche, reducing its summit from 2,950 meters to 2,550 meters above se