Quakprep. -

But seismologists disagree. The Cascadia Subduction Zone (a 700-mile fault off the Pacific Northwest) has a 37% chance of producing a magnitude 8.0+ event in the next 50 years. In California, the probability of a magnitude 6.7 or higher earthquake in the next 30 years exceeds 99%.

Tsunami risk after shaking. If you feel violent shaking for 20+ seconds and you are near the coast, do not wait for a warning. Walk to high ground immediately (100 feet elevation or 2 miles inland). quakprep.

This is where enters the conversation.