M4.8 earthquake — 85 km W of Petrolia, CA
An magnitude 4.8 earthquake occurred 85 km W of Petrolia, CA on Aug 29, 2026 at 02:41 UTC. The epicenter was at a depth of 10 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 | M4.8 |
|---|---|
| Depth | 10.0 km |
| Coordinates | 40.450, -125.272 |
| Time | Aug 29, 02:41 UTC |
| Location | 85 km W of Petrolia, CA |
| USGS event ID | nc75426637 |
What this magnitude typically means
Light earthquakes are felt by most people nearby but rarely cause damage. Distance, depth, and soil type determine whether a quake feels sharp or barely noticeable. 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 |
|---|---|---|---|
| M2.9 | 8 km | Aug 29, 17:12 UTC | 77 km W of Petrolia, CA |
| M2.6 | 22 km | Aug 28, 21:24 UTC | 66 km W of Petrolia, CA |
| M2.6 | 59 km | Aug 25, 23:02 UTC | 143 km W of Ferndale, California |
| M2.8 | 129 km | Aug 29, 07:48 UTC | 209 km W of Ferndale, California |
| M2.9 | 166 km | Aug 29, 07:49 UTC | 250 km W of Ferndale, California |
| M2.6 | 180 km | Aug 29, 09:18 UTC | 264 km W of Ferndale, California |
Earthquake activity in this area
Source: USGS earthquake catalog. Automated readings may be revised. Not for emergency use.