Seconds From Disaster S2 E4 - Mount St. Helens Eruption

Seconds From Disaster

Seconds From Disaster S2 E4 - Mount St. Helens Eruption
7.1

Mount St. Helens, in the countryside of Washington State, has been dormant for 123 years. But on May 1980, it suddenly erupts, killing 57. Why couldn't they predict it?