#MSH45 | October 1980 Let’s revisit the final eruption sequence of Mount St. Helens in 1980, featuring footage from the U.S. Geological Survey that may feel a bit too close for comfort. Once the column of ash dissipates, we can see the earliest stages of the lava dome’s formation within the crater. #pnw #mountsthelens #volcano #washingtonstate #geology #1980 #history | Mount St. Helens in 1980