3.4
Earthquake Details: 9 km SW of Brentwood, California
Sep 12, 2026, 07:25:55
A magnitude 3.4 earthquake occurred near 9 km SW of Brentwood, California on Sep 12, 2026 at 07:25:55. The seismic event was recorded at a depth of 17.89 km. No tsunami warning was issued.
No Tsunami WarningStatus: ReviewedType: Earthquake
Regional Seismicity
Technical Details
Depth17.89 km
Significance243
Latitude37.8728
Longitude-121.8003
Event IDnc75434122
Magnitude3.4
Updated:Sep 12, 2026, 09:25:53 UTC
External Resources
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Time & depth
- Local time
- Sep 12, 2026, 00:25:55 PDT
- UTC
- Sep 12, 2026, 07:25:55 UTC
17.89 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby major cities
Nearby event sequence · 11
M2.528 km WSW of Olancha, CaliforniaBeforeM2.611 km WNW of Cobb, CaliforniaBeforeM2.712 km WNW of Cobb, CaliforniaBeforeM3.820 km WSW of Petrolia, CaliforniaBeforeM3.621 km W of Petrolia, CaliforniaBeforeM2.52 km ESE of Oakland, CaliforniaBeforeM3.010 km WNW of Cobb, CaliforniaBeforeM3.110 km WNW of Cobb, CaliforniaBeforeM2.51 km N of The Geysers, CaliforniaBeforeM2.66 km W of Edwards Air Force Base, CaliforniaBeforeM2.5southern CaliforniaBefore
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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: Sep 12, 2026, 09:25 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.