M3.1 Earthquake 202 km W of Bandon, Oregon — October 13, 2025
2025-10-13 21:27:59 UTC (2025-10-13) · approx. 1:27 PM UTC-8 local
On October 13, 2025 at 21:27 UTC, a magnitude 3.1 shallow crustal earthquake struck 202 km W of Bandon, Oregon, at a depth of 10.0 km and coordinates 43.4103°, -126.8669°.
Physical scale: An earthquake of magnitude 3.1 releases seismic energy equivalent to roughly 674 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 83 m — a useful intuition for the size of the slip patch on the fault.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.5 mainshock that occurred 17 days ago 218 km W of Bandon, Oregon. Since the mainshock, the USGS has recorded 2 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
-126.8669°E
Technical Information
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Common Questions
How strong was the magnitude 3.1 earthquake near Bandon, Oregon?
The magnitude 3.1 earthquake that struck 202 km W of Bandon, Oregon on October 13, 2025 at 21:27 UTC had a depth of 10.0 km. For context, this was a minor earthquake typically detected only by instruments.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.1 earthquakes can continue for several days and gradually diminish over time.
Is this the same earthquake as the M5.5 one earlier?
No. This magnitude 3.1 earthquake is an aftershock of the larger magnitude 5.5 mainshock that occurred earlier 218 km W of Bandon, Oregon. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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Understanding This Data
Magnitude 3.1 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000rgyl). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, October 13, 2025). M3.1 Earthquake 202 km W of Bandon, Oregon — October 13, 2025. Retrieved January 1, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rgyl/