Seismic Monitor
Oregon earthquakes today: live seismic activity and Cascadia monitoring
Use this page to monitor recent earthquakes in Oregon, see where seismic activity is clustering, and explore individual event details.
Recent earthquakes in Oregon
Seismic events sorted by the latest updates with detail links for deeper context.
| Event | Severity |
|---|
Seismic hotspots
Where activity is clustering
About this tracker
Oregon and the Cascadia Subduction Zone
Oregon sits above the Cascadia Subduction Zone, where the Juan de Fuca Plate is diving beneath the North American Plate. This 1,000 km megathrust fault stretches from Northern California to British Columbia and is capable of producing a magnitude 9.0+ earthquake — equivalent to the 2011 Japan earthquake. The last Cascadia megathrust rupture occurred on January 26, 1700, generating a tsunami that reached Japan.
Geological evidence shows these full-length ruptures occur roughly every 200-600 years, and the current 326-year pause places us within the expected recurrence window. Portland, Eugene, and coastal communities face severe risk from both shaking and tsunamis. Track Pacific Northwest seismic activity on our earthquake tracker.
Frequently Asked Questions
Is Oregon overdue for a major earthquake?
The Cascadia Subduction Zone last ruptured in 1700 — 326 years ago. With a recurrence interval of 200-600 years, the region is within the expected window for another magnitude 9+ earthquake. Scientists estimate a 10-15% probability of a full-length Cascadia rupture within the next 50 years.
Explore next
Related intelligence surfaces
Last updated 3/15/2026, 1:04:38 PM