Overview | Scientists Solve the Mystery of a 300-Year-Old Megaquake | Season 2 | Episode 7 | PBS

The 1700 Cascadia earthquake and tsunami was a natural disaster that reshaped the Pacific Northwest. Through tree rings, soil layers and international collaboration, scientists have pieced together the exact timing of the event. As the region braces for another quake, can we prepare in time? Find out how new models and tsunami evacuation towers are helping coastal communities face the threat.