M2.5 earthquake — 32 km WNW of Petrolia, CA
An magnitude 2.5 earthquake occurred 32 km WNW of Petrolia, CA on Jul 28, 2026 at 09:35 UTC. The epicenter was at a depth of 18 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 | M2.5 |
|---|---|
| Depth | 18.0 km |
| Coordinates | 40.458, -124.621 |
| Time | Jul 28, 09:35 UTC |
| Location | 32 km WNW of Petrolia, CA |
| USGS event ID | nc75407192 |
What this magnitude typically means
Very small earthquakes are usually only detected by instruments and are rarely felt. They are a normal part of background seismic activity. 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 |
|---|---|---|---|
| M2.5 | 169 km | Jul 23, 00:30 UTC | 11 km ESE of Willits, CA |
| M3.1 | 178 km | Jul 24, 01:02 UTC | 209 km W of Ferndale, California |
| M2.5 | 236 km | Jul 29, 02:40 UTC | 8 km ESE of Cloverdale, CA |
| M4.3 | 236 km | Jul 29, 02:40 UTC | 8 km ESE of Cloverdale, CA |
| M2.5 | 243 km | Jul 27, 06:29 UTC | 3 km NW of The Geysers, CA |
| M2.7 | 247 km | Jul 27, 15:29 UTC | 3 km ENE of The Geysers, CA |
Earthquake activity in this area
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Source: USGS earthquake catalog. Automated readings may be revised. Not for emergency use.