Story perspectives
Study Warns: Mega Quake Threatens Pacific Northwest and Beyond
10/10/2025
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Story summary
- A new study warns of a potential magnitude 9 earthquake in the Pacific Northwest that could trigger a magnitude 7.9 quake on the San Andreas fault.
- Researchers found synchronized earthquakes within minutes of each other, suggesting simultaneous impacts on San Francisco, Portland, and Seattle.
- Federal emergency managers predict initial tsunami waves up to 80 feet high across multiple states and parts of Canada and urge better preparedness.
