3.5
Earthquake Details: 20 km WSW of Petrolia, California, United States
Sep 16, 2026, 14:34:52
- Depth
- 20.15 km
- Felt reports
- 18
Source: USGSUpdated: Sep 29, 2026, 07:02 PM UTC
A magnitude 3.5 earthquake occurred on Sep 16, 2026 at 14:34:52. Epicenter: 20 km WSW of Petrolia, California, United States. Reported depth: 20.15 km.
Status: Reviewed
Tsunami information
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Time & depth
- Local time
- Sep 16, 2026, 07:34:52 PDT
- UTC
- Sep 16, 2026, 14:34:52 UTC
20.15 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.
- USGSmw 3.52
nc75436587
- Depth:
- 20.15 km
- Status:
- Reviewed
- Time:
- Updated:
- Sep 29, 2026, 07:02 PM UTC
Technical Details
Depth20.15 km
Significance197
Latitude40.2853
Longitude-124.5187
Event IDnc75436587
Magnitude3.5
Updated:Sep 29, 2026, 19:02:21 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: Sep 29, 2026, 19:02 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.