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Light mag. 4.4 earthquake - 31 mi south of Eureka, Humboldt County, California, USA, on Tuesday, Nov 2, 2021 at 5:24 pm (GMT -7) -

Light mag. 4.4 earthquake - 31 mi south of Eureka, Humboldt County, California, USA, on Tuesday, Nov 2, 2021 at 5:24 pm (GMT -7) Light mag. 4.4 earthquake - 31 mi south of Eureka, Humboldt County, California, USA, on Tuesday, Nov 2, 2021 at 5:24 pm (GMT -7)

Light magnitude 4.4 earthquake at 30 km depth

3 Nov 00:28 UTC: First to report: USGS after 3 minutes.
3 Nov 00:30: Magnitude recalculated from 4.2 to 4.4.
3 Nov 06:56: Hypocenter depth recalculated from 26.0 to 29.6 km (from 16.2 to 18.4 mi). Epicenter location corrected by 2.5 km (1.6 mi) towards SW.
Update Wed, 3 Nov 2021, 00:36
Magnitude 4.4 earthquake strikes near Eureka, Humboldt County, California, USA
4.4 quake 2 Nov 5:24 pm (GMT -7)
4.4 quake 2 Nov 5:24 pm (GMT -7)
Just 11 minutes ago, a 4.4-magnitude earthquake struck near Eureka, Humboldt County, California, USA. The tremor was recorded in the afternoon on Tuesday, November 2nd, 2021, at 5:24 pm local time, at a shallow depth of 16 miles below the surface.
The event was filed by the United States Geological Survey, the first seismological agency to report it.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 4.4 earthquake as well.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in Scotia (pop. 850) located 10 miles from the epicenter, Rio Dell (pop. 3,400) 11 miles away, Fortuna (pop. 12,000) 16 miles away, Humboldt Hill (pop. 3,400) 24 miles away, and Eureka (pop. 27,000) 30 miles away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Bayside (pop. 17,100) located 33 miles from the epicenter, Uniontown (pop. 17,800) 35 miles away, and McKinleyville (pop. 15,200) 40 miles away.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.

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Earthquake data

Earthquake details

Date & timeNov 3, 2021 00:24:51 UTC -
Local time at epicenterTuesday, Nov 2, 2021 at 5:24 pm (GMT -7)
StatusConfirmed
Magnitude4.4
Depth29.6 km
Epicenter latitude / longitude40.363°N / 124.25533°W (Humboldt, California, United States)
Antipode40.363°S / 55.745°E
Shaking intensityLight shaking
Felt8 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoClear Lake (200 km / 124 mi)
Nearby towns and cities19 km (12 mi) SW of Scotia (Humboldt County) (pop: 850) | Show on map | Quakes nearby
27 km (17 mi) SSW of Fortuna (Humboldt County) (pop: 12,000) | Show on map | Quakes nearby
46 km (28 mi) NW of Redway (pop: 1,230) | Show on map | Quakes nearby
49 km (31 mi) S of Eureka (Humboldt County) (pop: 27,000) | Show on map | Quakes nearby
56 km (35 mi) SSW of Bayside (Humboldt County) (pop: 17,100) | Show on map | Quakes nearby
58 km (36 mi) SSW of Arcata (Humboldt County) (pop: 17,800) | Show on map | Quakes nearby
66 km (41 mi) S of McKinleyville (Humboldt County) (pop: 15,200) | Show on map | Quakes nearby
83 km (52 mi) SW of Willow Creek (pop: 1,710) | Show on map | Quakes nearby
93 km (58 mi) WSW of Hayfork (pop: 2,370) | Show on map | Quakes nearby
309 km (192 mi) NW of Sacramento (pop: 490,700) | Show on map | Quakes nearby
Weather at epicenter at time of quakeScattered Clouds 15°C (59 F), humidity: 66%, wind: 3 m/s (5 kts) from S
Estimated seismic energy released2.5 x 1011 joules (69.8 megawatt hours, equivalent to 60 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!
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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
4.430 km7km NE of Petrolia, CAUSGS
4.229 kmNORTHERN CALIFORNIAEMSC

User reports for this quake (10)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Fort Bragg, Mendocino, California (117.7 km SSE of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)
Myers Flat ca salmon creek watershed (29.1 km ESE of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s : sitting recliner first was a horizontal swinging then a rattling shake lasted about 6 seconds  
Rio Dell, Humboldt, California (20.1 km NE of epicenter) [Map] / Weak shaking (MMI III) / single lateral shake / 1-2 s : Sitting on my bed, just felt one bump slightly forward, like hitting the brake hard in a car.  
Crescent City / not felt
Redway, CA / Light shaking (MMI IV) / single lateral shake / 1-2 s
Eureka / not felt (reported through our app)
Shelter Cove Ca / Very weak shaking (MMI II) / 1-2 s
Fortuna / Weak shaking (MMI III) / 15-20 s
Honeydew / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s : Temblor moderado  
Rio dell ca / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
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