4.8
Earthquake Details: 85 km W of Petrolia, CA
Aug 29, 2026, 02:41:11
A magnitude 4.8 earthquake occurred near 85 km W of Petrolia, CA on Aug 29, 2026 at 02:41:11. The seismic event was recorded at a depth of 10 km. No tsunami warning was issued.
No Tsunami WarningStatus: ReviewedType: Earthquake
Regional Seismicity
Technical Details
Depth10 km
Significance464
Latitude40.4500
Longitude-125.2723
Event IDnc75426637
Magnitude4.8
Updated:Aug 29, 2026, 15:21:24 UTC
External Resources
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Time & depth
- Local time
- Aug 28, 2026, 19:41:11 PDT
- UTC
- Aug 29, 2026, 02:41:11 UTC
10 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby major cities
Nearby event sequence · 10
M2.31 km SE of Pacifica, CABeforeM1.611 km SSE of Sunol, CABeforeM2.76 km NNW of Redwood Valley, CABeforeM1.913 km SE of Hidden Valley Lake, CABeforeM2.666 km W of Petrolia, CABeforeM4.8136 km W of Ferndale, CaliforniaBeforeM3.5off the coast of OregonAfterM2.8209 km W of Ferndale, CaliforniaAfterM2.9250 km W of Ferndale, CaliforniaAfterM2.6264 km W of Ferndale, CaliforniaAfter
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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: Aug 29, 2026, 15:21 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.