Earthquake Information: low mag. Earthquake 3.3 – 37 km southwest of Fortuna, Humboldt County, California, United States, on Wednesday, September 29, 2021 at 11:37 p.m. (GMT -7)
Low magnitude earthquake 3.3 to 23 km deep
30 Sep 06:40 UTC: First to report: USGS after 2 minutes.
Updated Thu Sep 30 2021, 06:45 AM
Small 3.3 earthquake strikes near Fortuna, Humboldt County, California, United States
earthquake 3.3 September 29 23:37 (GMT -7)
Just 7 minutes ago, a magnitude 3.3 earthquake struck near Fortuna, Humboldt County, California, United States. The tremor was recorded late on Wednesday night, September 29, 2021 at 11:37 p.m. local time at a shallow depth of 14 miles below the surface.
The event was classified by the United States Geological Survey, the first seismological agency to report it.
Our monitoring service identified a second report from the Euro-Mediterranean Seismological Center (EMSC) which also listed the magnitude 3.3 earthquake.
Cities near the epicenter where the quake could have been felt as very weak tremors include Scotia (pop. 850) located 18 miles from the epicenter, Rio Dell (pop. 3,400) at 18 miles, and Ferndale ( pop. 1400) 19 miles away. At Fortuna (pop. 12,000, 23 miles), Eureka (pop. 27,000, 36 miles), Bayside (17,100, 40 miles), Uniontown (pop. 17,800, 41 miles) and McKinleyville (pop. 15,200 , 46 miles), the quake was probably not felt.
If you were or still are in this area during the earthquake help others with your comments and report it here.
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Earthquake data
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Date and hour : 30 Sep 2021 06:37:42 UTC –
Local time at epicenter: Wednesday 29 Sep 2021 11:37 pm (GMT -7)
Magnitude: 3.3
Depth: 23.2 km
Latitude / longitude of epicenter: 40.299 ° N / 124.33167 ° W↗ 
(Humboldt, California, United States)
Antipode: 40.299 ° S / 55.668 ° E↗
Nearest volcano: Clear Lake (199 km / 124 mi)
Nearby towns and villages:
28 km (18 mi) southwest of Scotland (Humboldt County) (pop: 850) -> See nearby earthquakes!
36 km (23 mi) SSO of Fortuna (Humboldt County) (pop: 12,000) -> See earthquakes nearby!
48 km (30 mi) to WNW of Redway (pop: 1,230) -> See nearby earthquakes!
58 km (36 mi) SSO of Eureka (Humboldt County) (pop: 27,000) -> See nearby earthquakes!
65 km (40 mi) SSO of Bayside (Humboldt County) (pop: 17,100) -> Observe the earthquakes nearby!
67 km (41 mi) SSO of Uniontown (Humboldt County) (pop: 17,800) -> Observe the earthquakes nearby!
75 km (46 mi) SSO of McKinleyville (Humboldt County) (pop: 15,200) -> Observe the earthquakes nearby!
93 km (58 mi) southwest of Willow stream (pop: 1,710) -> See nearby earthquakes!
167 km (104 mi) west of Redness (pop: 91,600) -> See earthquakes nearby!
310 km (192 mi) northwest of Sacramento (pop: 490,700) -> See earthquakes nearby!
Clear sky
8.7 ° C (48 F), humidity: 70%, wind: 5 m / s (10 kts) from NNEMain data source: USGS (United States Geological Survey)
Estimated energy released: 5.6 x 109 joules (1.56 megawatt hours, equivalent to 1.34 tonnes of TNT) Find out more
If you did NOT feel the earthquake although you are in the area, please report it! Your contribution is valuable to earthquake science, seismic risk analysis and mitigation efforts. You can use your device’s location or the map to show where you were during the earthquake. Thank you!
Data for the same earthquake reported by different agencies
Info: The more agencies report the same earthquake and publish similar data, the more confidence you can have in the data. It normally takes up to a few hours for the seismic parameters to be calculated with near optimum accuracy.
| Mag. | Depth | Site | Source |
| 3.3 | 23 km | 5 km on the southwest of Petrolia, CA | USGS |
| 2.8 | 33 km | NORTHERN CALIFORNIA | EMSC |
Previous earthquakes in the same region
Click here to search our database for previous earthquakes in the same area since 1900!