DEADLY ERUPTION 🌋: It has been 46 years since Mount St. Helens in Washington erupted, claiming 57 lives, including a USGS scientist. The blast sent a massive ash plume 80,000 feet into the air, blocking out the sun in nearby communities. This volcanic explosion remains the deadliest and most destructive volcanic event in U.S. history. #volcano #washington #USGS #mountsthelens