4.7
Earthquake Details: 85 km W of Petrolia, California
Aug 29, 2026, 02:41:11
A magnitude 4.7 earthquake occurred near 85 km W of Petrolia, California on Aug 29, 2026 at 02:41:11. The seismic event was recorded at a depth of 10 km. A tsunami warning was issued for this event.
Tsunami WarningStatus: ReviewedType: Earthquake
Regional Seismicity
Technical Details
Depth10 km
Significance436
Latitude40.4500
Longitude-125.2723
Event IDnc75426637
Magnitude4.7
Updated:Sep 5, 2026, 02:51:21 UTC
External Resources
View on USGS Official SiteLoading map...
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 · 12
M2.33 km NNE of Graton, CaliforniaAfterM4.4184 km W of Ferndale, CaliforniaAfterM2.7186 km W of Bandon, OregonAfterM2.9233 km W of Ferndale, CaliforniaAfterM2.34 km E of Challenge-Brownsville, CaliforniaAfterM2.62 km N of Middletown, CaliforniaAfterM3.04 km WSW of Hamilton city, CaliforniaAfterM3.2196 km W of Port Orford, OregonAfterM2.815 km SE of Petrolia, CaliforniaAfterM3.33 km ESE of Larkfield-Wikiup, CaliforniaAfterM3.7off the coast of OregonAfterM2.32 km N of The Geysers, 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: Sep 5, 2026, 02:51 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.