Recent earthquakes in Oregon
Oregon's greatest earthquake hazard is the offshore Cascadia subduction zone, which can produce magnitude 9 earthquakes and a major tsunami along the coast. Local crustal faults and volcanic activity in the Cascades add further hazard inland. The last Cascadia earthquake struck in January 1700, known from Japanese tsunami records and coastal geology. In the past 24 hours, Oregon has recorded 1 earthquake, the largest an M2.5 (32 km WNW of Petrolia, CA).
Counts include M2.5+ events — the smallest size USGS reports consistently worldwide.
Recent earthquakes
| Magnitude | Time (UTC) | Depth | Location |
|---|---|---|---|
| M2.5 | Jul 28, 09:35 UTC | 18 km | 32 km WNW of Petrolia, CA |
| M4.2 | Jul 23, 19:16 UTC | 10 km | 150 km WNW of Port Orford, Oregon |
| M3.0 | Jul 22, 05:09 UTC | 10 km | 189 km W of Bandon, Oregon |
Notable recent activity
An M4.2 earthquake struck 150 km WNW of Port Orford, Oregon at 19:16 UTC on Jul 23 at a depth of 10 km.
An M3.0 earthquake struck 189 km W of Bandon, Oregon at 05:09 UTC on Jul 22 at a depth of 10 km.
An M2.5 earthquake struck 32 km WNW of Petrolia, CA at 09:35 UTC on Jul 28 at a depth of 18 km.
Frequently asked questions
Is Oregon at risk of a major earthquake?
Yes. The offshore Cascadia subduction zone can generate a magnitude 9 earthquake affecting the entire Oregon coast and interior. Local faults and Cascade volcanic activity add to the state's overall hazard.
When was the last Cascadia earthquake?
The most recent great Cascadia earthquake struck on January 26, 1700, dated precisely from the tsunami it sent across the Pacific to Japan and from coastal geologic evidence. Such earthquakes recur on average every few hundred years.
Does Oregon get earthquakes now?
Oregon experiences frequent small earthquakes and occasional moderate ones, such as the 1993 Klamath Falls (M6.0) and Scotts Mills (M5.6) earthquakes. The rarer great Cascadia events pose the largest potential impact.
Nearby regions
Live data from the USGS earthquake feeds. Magnitudes and depths are automated readings and may be revised. Not for emergency use.