'The Big One' could trigger larger earthquake along West Coast

Breakdown

• A new study finds a major earthquake in the Pacific Northwest could trigger a larger quake along the West Coast. 6s
• Geological evidence shows past earthquakes on the Cascadia and San Andreas faults occurred in rapid succession. 57s
• Researchers say it is a matter of when, not if, a major earthquake will occur. 1m 20s
• Cities including Seattle, Portland, Vancouver, and San Francisco could be affected by large earthquakes. 1m 39s
• Experts warn that much of the region's infrastructure is vulnerable to earthquake damage. 2m 10s