M3.8 earthquake — 20 km WSW of Petrolia, CA
An magnitude 3.8 earthquake occurred 20 km WSW of Petrolia, CA on Sep 10, 2026 at 01:24 UTC. The epicenter was at a depth of 20 km — a shallow earthquake. Shallow quakes concentrate their energy near the surface, so they tend to produce stronger shaking close to the epicenter.
Event data
| Magnitude | M3.8 |
|---|---|
| Depth | 20.3 km |
| Coordinates | 40.289, -124.516 |
| Time | Sep 10, 01:24 UTC |
| Location | 20 km WSW of Petrolia, CA |
| USGS event ID | nc75432947 |
What this magnitude typically means
Minor earthquakes are often felt close to the epicenter but almost never cause damage. Whether you feel one at all depends on how near and how shallow it is. Tremor does not compute a single local shaking figure here, because how strong a quake feels at any address depends on distance, depth and local geology — open the interactive globe to explore the ShakeMap and estimated intensity.
Nearby recent earthquakes
| Magnitude | Distance | Time (UTC) | Location |
|---|---|---|---|
| M3.6 | 1 km | Sep 10, 01:24 UTC | 21 km W of Petrolia, CA |
| M2.5 | 11 km | Sep 12, 02:42 UTC | 24 km SW of Petrolia, CA |
| M3.7 | 77 km | Sep 7, 21:44 UTC | 36 km E of Hydesville, CA |
| M2.7 | 214 km | Sep 9, 19:12 UTC | 12 km WNW of Cobb, CA |
| M2.6 | 214 km | Sep 9, 17:19 UTC | 11 km WNW of Cobb, CA |
| M3.1 | 215 km | Sep 10, 20:36 UTC | 10 km WNW of Cobb, CA |
Earthquake activity in this area
Source: USGS earthquake catalog. Automated readings may be revised. Not for emergency use.