How a megathrust earthquake could hit the Pacific Northwest and SW BC

 https://www.youtube.com/watch?v=GP-vyAwiXCM 

Why ‘The Big One’ could be worse than we thought https://www.youtube.com/watch?v=t1qr9qnWR7E

Cascadia: The Earthquake that will Destroy Westcoast America https://www.youtube.com/watch?v=JR-8PZ_nCvE