3.3
Earthquake Details: 8 km E of Clayton, California, United States
9/15/2025, 10:00:08 PM
A magnitude 3.3 earthquake occurred near 8 km E of Clayton, California, United States on 9/15/2025 at 10:00:08 PM. The seismic event was recorded at a depth of 7.5 km. No tsunami warning was issued.
No Tsunami WarningStatus: reviewedType: earthquake
Regional Seismicity
Technical Details
Depth7.5 km
Significance376
Latitude37.9412
Longitude-121.8502
Event IDnc75238127
Magnitude3.3
Updated:12/3/2025, 3:58:41 AM
External Resources
View on USGS Official SiteLoading map...
Time & depth
- Local time
- 9/15/2025, 3:00:08 PM PDT
- UTC
- 9/15/2025, 10:00:08 PM UTC
7.5 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby major cities
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: Dec 3, 2025, 03:58 AM UTC.
Data sources:
- USGS — Credit: U.S. Geological Survey.
- EMSC — Credit: EMSC/CSEM. Event catalogue data are provided under CC BY 4.0. 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. CC BY 4.0
- GeoNet — We acknowledge the New Zealand GeoNet programme and its sponsors NHC, Earth Sciences NZ, LINZ, NEMA and MBIE for providing earthquake data.