3.8
Earthquake Details: 20 km E of Castle Rock, Washington, United States
Sep 5, 2026, 11:09:28
- Depth
- 17.67 km
- Felt reports
- 1,025
Source: USGSUpdated: Oct 15, 2026, 08:23 AM UTC
A magnitude 3.8 earthquake occurred on Sep 5, 2026 at 11:09:28. Epicenter: 20 km E of Castle Rock, Washington, United States. Reported depth: 17.67 km.
Status: Reviewed
Tsunami information
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Time & depth
- Local time
- Sep 5, 2026, 04:09:28 PDT
- UTC
- Sep 5, 2026, 11:09:28 UTC
17.67 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
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Nearby major cities
Agency measurements
Agencies may use different observations and magnitude scales, and initial estimates can change.
- USGSml 3.75
uw714095342
- Depth:
- 17.67 km
- Status:
- Reviewed
- Time:
- Updated:
- Oct 15, 2026, 08:23 AM UTC
Technical Details
Depth17.67 km
Significance646
Latitude46.2465
Longitude-122.6420
Event IDuw714095342
Magnitude3.8
Updated:Oct 15, 2026, 08:23:05 UTC
Regional Seismicity
External Resources
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Earthquake information is automatically aggregated from the official seismic agencies listed below. Preliminary measurements can change as agencies review an event; use local emergency authorities for safety decisions. Latest successful data update: Oct 15, 2026, 08:23 UTC.
Data sources:
- USGS — Credit: U.S. Geological Survey.
- EMSC — Credit: EMSC/CSEM. Event catalogue data are provided under CC BY 4.0.
- JMA — Source: Japan Meteorological Agency (JMA).
- Geoscience Australia — Based on Australian Earthquakes data by Geoscience Australia. © Commonwealth of Australia. Licensed under CC BY 4.0; the section 5 disclaimer applies.
- GeoNet — We acknowledge the New Zealand GeoNet programme and its sponsors NHC, Earth Sciences NZ, LINZ, NEMA and MBIE for providing earthquake data.
- CENC / Wolfx — CENC earthquake parameters via Wolfx, an independent unofficial relay.
- GFZ / GEOFON — Locations, depths and magnitudes: GFZ/GEOFON using GEVN network data (CC BY 4.0).