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Light mag. 3.3 earthquake - 23 mi south of Eureka, Humboldt County, California, USA, on Friday, May 20, 2022 at 9:20 am (GMT -7) -

Light mag. 3.3 earthquake - 23 mi south of Eureka, Humboldt County, California, USA, on Friday, May 20, 2022 at 9:20 am (GMT -7) Light mag. 3.3 earthquake - 23 mi south of Eureka, Humboldt County, California, USA, on Friday, May 20, 2022 at 9:20 am (GMT -7)

Light magnitude 3.3 earthquake at 18 km depth

20 May 16:24 UTC: First to report: USGS after 4 minutes.
Update Fri, 20 May 2022, 16:30
Small tremor of magnitude 3.3 just reported 23 miles southwest of Eureka, California, United States
3.3 quake 20 May 9:20 am (GMT -7)
3.3 quake 20 May 9:20 am (GMT -7)
An earthquake of magnitude 3.3 occurred in the morning on Friday, May 20th, 2022, at 9:20 am local time near Eureka, Humboldt County, California, USA, as reported by the United States Geological Survey.
According to preliminary data, the quake was located at a shallow depth of 11 miles. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from the citizen-seismograph network of RaspberryShake which listed the quake at magnitude 3.3 as well. A third agency, the European-Mediterranean Seismological Centre (EMSC), reported the same quake at magnitude 3.3.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Ferndale (pop. 1,400) located 6 miles from the epicenter, Rio Dell (pop. 3,400) 10 miles away, Fortuna (pop. 12,000) 11 miles away, Humboldt Hill (pop. 3,400) 18 miles away, Pine Hills (pop. 3,100) 19 miles away, and Eureka (pop. 27,000) 23 miles away. In Bayside (pop. 17,100, 28 miles away), Arcata (pop. 17,800, 29 miles away), and McKinleyville (pop. 15,200, 33 miles away), the quake was probably not felt.

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Earthquake data

Earthquake details

Date & timeMay 20, 2022 16:20:35 UTC -
Local time at epicenterFriday, May 20, 2022 at 9:20 am (GMT -7)
StatusConfirmed
Magnitude3.3
Depth18.2 km
Epicenter latitude / longitude40.4865°N / 124.29884°W (Humboldt, California, United States)
Antipode40.487°S / 55.701°E
Shaking intensityWeak shaking near epicenter
Felt0 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoMount Shasta (204 km / 127 mi)
Nearby towns and cities10 km (6 mi) SSW of Ferndale (pop: 1,370) | Show on map | Quakes nearby
16 km (10 mi) W of Rio Dell (pop: 3,390) | Show on map | Quakes nearby
17 km (11 mi) SW of Fortuna (Humboldt County) (pop: 12,000) | Show on map | Quakes nearby
37 km (23 mi) SSW of Eureka (Humboldt County) (pop: 27,000) | Show on map | Quakes nearby
44 km (28 mi) SSW of Bayside (Humboldt County) (pop: 17,100) | Show on map | Quakes nearby
46 km (29 mi) SSW of Arcata (Humboldt County) (pop: 17,800) | Show on map | Quakes nearby
54 km (33 mi) SSW of McKinleyville (Humboldt County) (pop: 15,200) | Show on map | Quakes nearby
321 km (199 mi) NW of Sacramento (pop: 490,700) | Show on map | Quakes nearby
Weather at epicenter at time of quakeClear Sky 9.4°C (49 F), humidity: 61%, wind: 4 m/s (8 kts) from WNW
Estimated seismic energy released5.6 x 109 joules (1.56 megawatt hours, equivalent to 1.34 tons of TNT) | about seismic energy
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If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
If you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable to earthquake science, seismic hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
Mag.DepthLocationSource
3.318 km10km SSW of Ferndale, CAUSGS
2.824 kmNORTHERN CALIFORNIAEMSC
3.318 kmNear Coast of N. CaliforniaRaspberryShake

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.
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