Happy Mt. St. Helens Day

1980 eruption of Mount St. Helens – Wikipedia, the free encyclopedia On May 18, 1980, a major volcanic eruption occurred at Mount St. Helens, a volcano located in the state of Washington, United States. The eruption (a VEI 5 event) was the only significant volcanic eruption to occur in the contiguous 48 U.S. states since […]