M3.5 earthquake 20 km WSW of Petrolia, CA
A magnitude 3.5 earthquake struck 20 km WSW of Petrolia, CA at Sep 16, 10:34 AM ET, 20 km deep, minor – felt by people near the epicenter. 18 people reported feeling it.
Share
| Magnitude | 3.5 mw |
| Time | 16 Sept 2026, 14:34 UTC |
| Location | 40.285°, -124.519° – 20 km WSW of Petrolia, CA |
| Depth | 20.1 km |
| Felt reports | 18 |
| Max. estimated intensity (MMI) | 3.0 |
| USGS event | nc75436587 |
Other earthquakes nearby this year
| Mag. | Where | When (ET) | Depth | Felt |
|---|---|---|---|---|
| 5.1 | 62 km W of Petrolia, CA · PAGER green | Jun 3, 8:45 AM 135 d ago | 10 km | 125 reports |
| 4.8 | 97 km W of Petrolia, CA · PAGER green | Sep 29, 7:36 AM 17 d ago | 10 km | 20 reports |
| 4.7 | 85 km W of Petrolia, CA · tsunami flag · PAGER green | Aug 28, 10:41 PM 49 d ago | 10 km | 102 reports |
| 4.7 | 107 km W of Petrolia, CA · PAGER green | Feb 5, 7:49 AM 253 d ago | 10 km | 184 reports |
| 4.5 | 61 km W of Petrolia, CA · PAGER green | Jun 3, 10:36 PM 135 d ago | 10 km | 31 reports |
| 4.5 | 64 km W of Petrolia, CA · PAGER green | Jun 3, 9:11 AM 135 d ago | 10 km | 13 reports |
| 4.4 | 31 km NNW of Covelo, CA · PAGER green | Aug 5, 6:21 PM 72 d ago | 7 km | 122 reports |
| 4.3 | 90 km W of Ferndale, CA · PAGER green | Jan 22, 2:28 AM 268 d ago | 10 km | 10 reports |
| 4.2 | 65 km W of Petrolia, CA · PAGER green | Jan 18, 7:20 PM 271 d ago | 10 km | 12 reports |
| 4.1 | 54 km W of Petrolia, CA · PAGER green | Apr 25, 3:38 AM 175 d ago | 14 km | 5 reports |
| 4.0 | 31 km NNW of Covelo, CA · PAGER green | Aug 4, 8:25 PM 73 d ago | 8 km | 7 reports |
| 4.0 | 61 km W of Petrolia, CA | Jun 3, 11:51 AM 135 d ago | 10 km | 1 report |
About this earthquake
How strong was the 20 km WSW of Petrolia, CA earthquake?
Magnitude 3.5 (mw), minor – felt by people near the epicenter. Depth 20 km. Strongest estimated shaking: intensity 3.0 on the Modified Mercalli scale.
Was it felt?
18 people reported feeling it to the USGS "Did You Feel It?" survey; the highest reported intensity was 3.4.
Were there aftershocks?
1 earthquakes within 100 km in the following two weeks are in our records, the strongest M4.8.
More
Source: U.S. Geological Survey (USGS) earthquake catalog, real-time feeds and FDSN event service; magnitudes and locations are revised by seismologists for hours after an event. Times are Eastern (ET) unless marked UTC. Not an alert service: for warnings follow local authorities and tsunami centers.