In this July 22, 1980 file photo, Mount St. Helens erupts in Washington. Even today, May 18, 2015, on the 35th anniversary of the eruption, scientists still are learning by studying how the area devastated by the blast continues to recover from the eruption.

Credit: AP file

Photos: Mount St. Helens then and now

Mount St. Helens continues to captivate since its 1980 eruption. Today, May 18, 2015, marks the 35th anniversary of the catastrophic event.