Weak mag. 3.0 earthquake - North Pacific Ocean, 23 mi west of Eureka, Humboldt County, California, USA, on Thursday, 4 Mar 2021 2:52 pm (GMT -8) -
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Weak magnitude 3.0 earthquake at 22 km depth
4 Mar 22:54 UTC: First to report: USGS after 2 minutes.
5 Mar 17:48: Hypocenter depth recalculated from 2.5 to 21.8 km (from 1.6 to 13.5 mi). Epicenter location corrected by 4.7 km (2.9 mi) towards SW.
5 Mar 17:48: Hypocenter depth recalculated from 2.5 to 21.8 km (from 1.6 to 13.5 mi). Epicenter location corrected by 4.7 km (2.9 mi) towards SW.
Update Thu, 4 Mar 2021, 23:00
Small tremor of magnitude 3.0 just reported 20 miles southwest of Eureka, California, United States3.0 quake 4 Mar 2:52 pm (GMT -8)
A magnitude 3.0 earthquake near Eureka, Humboldt County, California, USA, was reported only 7 minutes ago by the United States Geological Survey, considered the key international and national agency that monitors seismic activity in the US. The earthquake occurred at a very shallow depth of 1.6 miles beneath the epicenter early afternoon on Thursday 4 March 2021 at 2:52 pm local time. 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 3.0 as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Indianola (pop. 820) located 16 miles from the epicenter. In Humboldt Hill (pop. 3,400, 18 miles away), Pine Hills (pop. 3,100, 20 miles away), Eureka (pop. 27,000, 20 miles away), Fortuna (pop. 12,000, 22 miles away), Arcata (pop. 17,800, 26 miles away), Bayside (pop. 17,100, 26 miles away), and McKinleyville (pop. 15,200, 27 miles away), the quake was probably not felt.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 3.0 as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Indianola (pop. 820) located 16 miles from the epicenter. In Humboldt Hill (pop. 3,400, 18 miles away), Pine Hills (pop. 3,100, 20 miles away), Eureka (pop. 27,000, 20 miles away), Fortuna (pop. 12,000, 22 miles away), Arcata (pop. 17,800, 26 miles away), Bayside (pop. 17,100, 26 miles away), and McKinleyville (pop. 15,200, 27 miles away), the quake was probably not felt.
Earthquake data:
Date & time: 4 Mar 2021 22:52:43 UTC -
Local time at epicenter: Thursday, 4 Mar 2021 2:52 pm (GMT -8)
Magnitude: 3
Depth: 21.8 km
Epicenter latitude / longitude: 40.6975°N / 124.57867°W
(North Pacific Ocean, California, United States)Nearest volcano: Mount Shasta (211 km / 131 mi)
Nearby towns and cities:
29 km (18 mi) W of Indianola (pop: 823) --> See nearby quakes!
37 km (23 mi) WSW of Eureka (Humboldt County) (pop: 27,000) --> See nearby quakes!
37 km (23 mi) WNW of Fortuna (Humboldt County) (pop: 12,000) --> See nearby quakes!
46 km (28 mi) WNW of Rio Dell (pop: 3,390) --> See nearby quakes!
46 km (28 mi) WSW of Arcata (Humboldt County) (pop: 17,800) --> See nearby quakes!
46 km (29 mi) WSW of Bayside (Humboldt County) (pop: 17,100) --> See nearby quakes!
49 km (30 mi) SW of McKinleyville (Humboldt County) (pop: 15,200) --> See nearby quakes!
56 km (35 mi) SW of Westhaven-Moonstone (pop: 1,210) --> See nearby quakes!
185 km (115 mi) W of Redding (pop: 91,600) --> See nearby quakes!
230 km (143 mi) SW of Medford (Oregon) (pop: 79,800) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky
15.5°C (60 F), humidity: 41%, wind: 9 m/s (18 kts) from SSW
Primary data source: USGS (United States Geological Survey)Clear Sky
15.5°C (60 F), humidity: 41%, wind: 9 m/s (18 kts) from SSWEstimated released energy: 2 x 109 joules (554 kilowatt hours, equivalent to 0.477 tons of TNT) More info
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.
| Magnitude | Depth | Location | Source |
| 3.0 | 22 km | 29km NW of Ferndale, CA, USA | USGS |
| 2.8 | 10 km | OFFSHORE NORTHERN CALIFORNIA, USA | EMSC |
User reports for this quake
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