Over the past 30 days, Washington has recorded 3 earthquakes of magnitude 2.5 or greater in our tracker. The remaining 3 fell in the M2.5–M3.9 band. By depth: 3 shallow (<70 km). 2 of the epicenters were offshore. 3 events produced at least one felt report, totalling 1,064 citizen submissions to the USGS Did You Feel It? system. Focal depths ranged from 10.0 km to 17.7 km. All 3 solutions have been reviewed by a USGS seismologist.
Each row in the table below includes a narrative summary of the event, ordered by time. Use the column headers to sort or filter by magnitude.
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
1 day ago 2026-09-12 04:17:36 UTC | 2.6ml | 2 km E of Mount Vernon, Washington 48.421°, -122.301° | 13.4 km | 9 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.6 earthquake 2 km E of Mount Vernon, Washington with origin time 04:17 UTC on September 12, 2026. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-05 2026-09-05 11:09:28 UTC | 3.8ml | 20 km E of Castle Rock, Washington 46.246°, -122.642° | 17.7 km | 1,025 | III | - | ✓ Reviewed | USGS → |
On September 5, 2026 at 11:09 UTC, a magnitude 3.8 earthquake struck 20 km E of Castle Rock, Washington. It is the largest earthquake currently listed for Washington over the past 30 days. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-19 2026-08-19 06:17:46 UTC | 2.9ml | 18 km ENE of Okanagan Falls, Canada 49.424°, -119.342° | 10.0 km | 30 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 earthquake was recorded 18 km ENE of Okanagan Falls, Canada on August 19, 2026 at 06:17 UTC. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
20 km E of Castle Rock, Washington
2026-09-05
2 km E of Oak Harbor, Washington
2026-07-02
Data from USGS Earthquake Hazards Program. Updated every 5 minutes.
Washington State faces significant earthquake risk from the Cascadia Subduction Zone, capable of producing magnitude 9+ earthquakes. The Seattle area also has local fault systems that pose additional risk.
In 2026, Washington has recorded 24 earthquakes of magnitude 2.5 or greater so far. The largest earthquake in Washington in 2026 was a magnitude 3.8 event near Oak Harbor, Washington.
Washington has a High seismic risk level based on historical earthquake data and proximity to active fault lines.
Over the past 30 days, there have been 3 recorded earthquakes in this region. The largest recent earthquake was a magnitude 3.8 event near 20 km E of Castle Rock, Washington.
In the past 30 days, 3 earthquakes have been recorded in the Washington region.
The largest recent earthquake in the Washington area was a magnitude 3.8 event that occurred 20 km E of Castle Rock, Washington.
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