Light mag. 3.5 earthquake - North Pacific Ocean, 21 mi southwest of Fortuna, Humboldt County, California, USA, on Thursday, 15 Apr 2021 9:09 pm (GMT -7) -

Light mag. 3.5 earthquake - North Pacific Ocean, 21 mi southwest of Fortuna, Humboldt County, California, USA, on Thursday, 15 Apr 2021 9:09 pm (GMT -7)

Light magnitude 3.5 earthquake at 20 km depth

16 Apr 04:12 UTC: First to report: USGS after 2 minutes.
16 Apr 07:10: Hypocenter depth recalculated from 17.6 to 20.2 km (from 10.9 to 12.6 mi). Epicenter location corrected by 2.7 km (1.7 mi) towards W.
Update Fri, 16 Apr 2021, 04:18
Magnitude 3.5 earthquake strikes near Eureka, Humboldt County, California, USA
3.5 quake 15 Apr 9:09 pm (GMT -7)
3.5 quake 15 Apr 9:09 pm (GMT -7)
The United States Geological Survey reported a magnitude 3.5 quake in the United States near Eureka, Humboldt County, California, only 8 minutes ago. The earthquake hit in the evening on Thursday 15 April 2021 at 9:09 pm local time at a shallow depth of 10.9 miles. 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 European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 3.5 as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Ferndale (pop. 1,400) located 15 miles from the epicenter, Rio Dell (pop. 3,400) 18 miles away, Fortuna (pop. 12,000) 19 miles away, Humboldt Hill (pop. 3,400) 26 miles away, Pine Hills (pop. 3,100) 27 miles away, and Eureka (pop. 27,000) 31 miles away. In Bayside (pop. 17,100, 36 miles away), Arcata (pop. 17,800, 37 miles away), and McKinleyville (pop. 15,200, 41 miles away), the quake was probably not felt.
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Earthquake data:

Date & time: 16 Apr 2021 04:09:45 UTC -
Local time at epicenter: Thursday, 15 Apr 2021 9:09 pm (GMT -7)
Magnitude: 3.5
Depth: 20.2 km
Epicenter latitude / longitude: 40.4035°N / 124.4525°W (North Pacific Ocean, California, United States)
Nearest volcano: Clear Lake (213 km / 132 mi)
Nearby towns and cities:
25 km (16 mi) SW of Ferndale (pop: 1,370) --> See nearby quakes!
31 km (19 mi) WSW of Rio Dell (pop: 3,390) --> See nearby quakes!
33 km (21 mi) SW of Fortuna (Humboldt County) (pop: 12,000) --> See nearby quakes!
51 km (31 mi) SSW of Eureka (Humboldt County) (pop: 27,000) --> See nearby quakes!
59 km (37 mi) SW of Bayside (Humboldt County) (pop: 17,100) --> See nearby quakes!
60 km (37 mi) SSW of Arcata (Humboldt County) (pop: 17,800) --> See nearby quakes!
62 km (39 mi) WNW of Redway (pop: 1,230) --> See nearby quakes!
67 km (42 mi) SSW of McKinleyville (Humboldt County) (pop: 15,200) --> See nearby quakes!
77 km (48 mi) SSW of Westhaven-Moonstone (pop: 1,210) --> See nearby quakes!
175 km (109 mi) W of Redding (pop: 91,600) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.1 x 1010 joules (3.12 megawatt hours, equivalent to 2.68 tons of TNT) More info
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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.
3.520 km14km NW of Petrolia, CA, USAUSGS

User reports for this quake (1)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Ferndale / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s
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