M2.8 earthquake — 54 km W of Petrolia, CA
An magnitude 2.8 earthquake occurred 54 km W of Petrolia, CA on Aug 5, 2026 at 16:05 UTC. The epicenter was at a depth of 2 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 | M2.8 |
|---|---|
| Depth | 1.7 km |
| Coordinates | 40.396, -124.920 |
| Time | Aug 5, 16:05 UTC |
| Location | 54 km W of Petrolia, CA |
| USGS event ID | nc75411812 |
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 |
|---|---|---|---|
| M2.6 | 13 km | Aug 3, 13:07 UTC | 43 km W of Petrolia, CA |
| M2.5 | 23 km | Jul 31, 08:25 UTC | 76 km W of Petrolia, CA |
| M2.7 | 48 km | Aug 3, 03:22 UTC | 7 km WSW of Petrolia, CA |
| M3.9 | 132 km | Aug 5, 22:20 UTC | 31 km NNW of Covelo, CA |
| M4.0 | 132 km | Aug 5, 00:25 UTC | 31 km NNW of Covelo, CA |
| M4.4 | 132 km | Aug 5, 22:21 UTC | 31 km NNW of Covelo, CA |
Earthquake activity in this area
See this quake on the live 3D globeShakeMap, seismogram and aftershock forecastGet earthquake alertsWatchlists with email, push and Slack
Source: USGS earthquake catalog. Automated readings may be revised. Not for emergency use.