Mount St. Helens had a huge eruption. It erupted in 1980. Many people died. Mount St. Helens erupted at 8:32 am.. The volcano was voted the worst volcano ever because of it's eruption. More than 500 homes were destroyed. There was a massive ash cloud that was 80,000 feet. There was also a lava dome that was 876 feet. After the eruption the crater was 450 meters deep.The actual volcano was 3,000 feet deep. The eruption caused some people to evacuate. The eruption killed many animals that lived around the mountain.