M4.8 Earthquake near off the coast of Oregon — October 29, 2025
2025-10-29 13:42:44 UTC (2025-10-29) · approx. 4:42 AM UTC-9 local
On October 29, 2025 at 13:42 UTC, a magnitude 4.8 shallow crustal earthquake struck near off the coast of Oregon, at a depth of 10.0 km and coordinates 44.6049°, -129.8321°. This earthquake was detected by 41 seismic stations with moderate location accuracy and was assigned a USGS significance rating of 354, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.8 releases seismic energy equivalent to roughly 239 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.2 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Oregon, a region characterized by the southern Cascadia Subduction Zone, with additional seismicity from crustal faults in the Willamette Valley. The nearest mapped fault system is the Cascadia Subduction Zone. View all earthquakes in Oregon.
Learn more: Cascadia Subduction Zone · Magnitude scale · Aftershock sequences
Earthquake Details
-129.8321°E
Technical Information
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Common Questions
How strong was the magnitude 4.8 earthquake near off the coast of Oregon?
The magnitude 4.8 earthquake that struck near off the coast of Oregon on October 29, 2025 at 13:42 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 44.6049°, -129.8321°, which is near off the coast of Oregon. View all earthquakes in Oregon.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.8 earthquakes can continue for several days and gradually diminish over time.
Has Oregon had earthquakes this big before?
The largest recorded earthquake in Oregon was the M7.3 offshore Brookings earthquake of November 23, 1873. Today's magnitude 4.8 event is significantly smaller than that historical record.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Authoritative source: USGS event page (event ID: us6000rk5p). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, October 29, 2025). M4.8 Earthquake near off the coast of Oregon — October 29, 2025. Retrieved May 22, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rk5p/