Posts tagged: Mount St. Helens
After several months of seismic buildup, Mount St. Helens’ eruption on May 18, 1980, may have been among the most anticipated in modern history. But the size and force of the blast, the landslide and mudflow from superheated snow were far beyond expectations. A magnitude-5.1 earthquake below the volcano triggered a blast that blew out the top 1,300 feet of the volcano, pushing some 3.7 billion cubic yards of debris to the north and west. Temperatures in the blast zone reached an estimated 600 degrees Fahrenheit. Trees were snapped off and laid down like dominoes. An avalanche of debris rushed down the North Toutle River, raising it as much as 600 feet in some spots, wiping out bridges and burying roads. Fifty-seven people died/Jim Camden, SR. More here.
Question: What were you doing when the mountain blew up?