Mount St. Helens erupted in southwestern Washington May 18, 1980. The eruption forever changed the jewel-like Spirit Lake, seen here prior to May 1980. (Corps of Engineers photo) [When mountains move, humans can only watch and figure out how to work with the changes.]

Mount St. Helens erupted in southwestern Washington May 18, 1980. The eruption forever changed the jewel-like Spirit Lake, seen here prior to May 1980. (Corps of Engineers photo)

Mount St. Helens erupted in southwestern Washington May 18, 1980. The eruption forever changed the jewel-like Spirit Lake, seen here prior to May 1980. (Corps of Engineers photo)