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A minor magnitude 3.5 earthquake struck off the coast of Oregon on Saturday, August 29, 2026 at 05:46:59 AM UTC. This shallow crustal event (10.0 km depth) released energy equivalent to approximately 3 tons of TNT. Here is the verified US telemetry, live epicenter map, and ground shaking assessment.
(off the coast of)3.5MB
Minor Seismic Class
10.0km
Crustal Layer
44.013° N, 128.799° W
GPS Coordinates
3 tons
TNT Equivalent Power
US
USGS Real-time Feed
A magnitude 3.5 event is classified as a minor earthquake. Often felt by people indoors, especially on upper floors. Hanging objects may swing slightly; structural damage is extremely rare.
Felt by nearly everyone. Sleeping people awakened; small unstable objects overturned.
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Earthquake strength is measured on a logarithmic scale. Compare this event with the full seismic scale:
Because seismic scales are logarithmic, each whole integer increase represents:
The western North American margin is shaped by the Pacific Ring of Fire, including the 800-mile San Andreas transform fault system and the Cascadia Subduction Zone. Lateral strike-slip motion between the Pacific and North American plates drives continuous crustal deformation across the region.
Originating at a depth of 10.0 km (Earth's Crust (0–70 km)), this rupture occurred occurred within the brittle upper crust. shallow earthquakes produce the highest peak ground acceleration and the sharpest surface shaking.
Seismologists note that minor aftershocks remain common in the 24 to 48 hours following tremors of magnitude 3.5. According to statistical seismic models, there is roughly a 5% probability of a subsequent event of equal or greater strength occurring in the same fault zone. Residents in United States are advised to check living spaces for unsecured items.
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