M4.8 earthquake — 97 km W of Petrolia, CA
An magnitude 4.8 earthquake occurred 97 km W of Petrolia, CA on Sep 29, 2026 at 11:36 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 | 40.422, -125.418 |
| Time | Sep 29, 11:36 UTC |
| Location | 97 km W of Petrolia, CA |
| USGS event ID | nc75444322 |
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 |
|---|---|---|---|
| M3.2 | 189 km | Sep 28, 13:30 UTC | 275 km W of Indianola, California |
| M2.6 | 220 km | Sep 27, 19:10 UTC | 9 km NW of Redwood Valley, CA |
| M2.7 | 228 km | Sep 26, 04:02 UTC | 10 km W of Boonville, CA |
| M3.7 | 228 km | Sep 26, 03:42 UTC | 10 km W of Boonville, CA |
| M2.7 | 236 km | Sep 28, 08:45 UTC | 199 km W of Gold Beach, Oregon |
Earthquake activity in this area
Source: USGS earthquake catalog. Automated readings may be revised. Not for emergency use.