Weak mag. 2.9 earthquake - North Pacific Ocean, 41 mi southwest of Eureka, Humboldt County, California, USA, on Thursday, 4 Mar 2021 9:08 am (GMT -8) -
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Séisme très faible magnitude 2.9 at 21 km depth
4 Mar 17:10 UTC: Premier à signaler: USGS après 2 minutes.
4 Mar 19:46: Magnitude recalculée de 3.0 à 2.9. Profondeur recalculée de 20.3 à 20.5 km (de 12.6 à 12.7 mi). Emplacement de l'épicentre corrigé de 2.2 km (1.4 mi) au O.
4 Mar 19:46: Magnitude recalculée de 3.0 à 2.9. Profondeur recalculée de 20.3 à 20.5 km (de 12.6 à 12.7 mi). Emplacement de l'épicentre corrigé de 2.2 km (1.4 mi) au O.
Update Thu, 4 Mar 2021, 17:15
Small tremor of magnitude 3.0 just reported 40 miles southwest of Eureka, California, United States3.0 quake 4 Mar 9:08 am (GMT -8)
Just 7 minutes ago, a 3.0-magnitude earthquake struck near Eureka, Humboldt County, California, USA. The tremor was recorded in the morning on Thursday 4 March 2021 at 9:08 am local time, at a shallow depth of 13 miles below the surface.
The event was filed by the United States Geological Survey, the first seismological agency to report it.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 3.0 as well.
According to preliminary calculations, we do not expect that the quake was felt by many people and did not cause any damage. In Ferndale (pop. 1,400, 24 miles away), Rio Dell (pop. 3,400, 26 miles away), Fortuna (pop. 12,000, 29 miles away), Humboldt Hill (pop. 3,400, 35 miles away), Eureka (pop. 27,000, 40 miles away), Bayside (pop. 17,100, 45 miles away), and Arcata (pop. 17,800, 46 miles away), the quake was probably not felt.
The event was filed by the United States Geological Survey, the first seismological agency to report it.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 3.0 as well.
According to preliminary calculations, we do not expect that the quake was felt by many people and did not cause any damage. In Ferndale (pop. 1,400, 24 miles away), Rio Dell (pop. 3,400, 26 miles away), Fortuna (pop. 12,000, 29 miles away), Humboldt Hill (pop. 3,400, 35 miles away), Eureka (pop. 27,000, 40 miles away), Bayside (pop. 17,100, 45 miles away), and Arcata (pop. 17,800, 46 miles away), the quake was probably not felt.
Earthquake data:
Date & time: 4 Mar 2021 17:08:32 UTC -
Local time at epicenter: jeudi, 4 mars 2021 09:08 (GMT -8)
Magnitude: 2.9
Profondeur: 20.5 km
Epicenter latitude / longitude: 40.291°N / 124.55333°W
(Océan Pacifique Nord, Comté de Kern, États-Unis)Volcan le plus près: Clear Lake (211 km / 131 mi)
Nearby towns and cities:
40 km SO de Ferndale (pop: 1,370) --> Voir les séismes à proximité!
44 km OSO de Rio Dell (pop: 3,390) --> Voir les séismes à proximité!
48 km SO de Fortuna (Humboldt County) (pop: 12,000) --> Voir les séismes à proximité!
65 km ONO de Redway (pop: 1,230) --> Voir les séismes à proximité!
66 km SSO de Eureka (Humboldt County) (pop: 27,000) --> Voir les séismes à proximité!
74 km SO de Bayside (Humboldt County) (pop: 17,100) --> Voir les séismes à proximité!
75 km SSO de Arcata (Humboldt County) (pop: 17,800) --> Voir les séismes à proximité!
82 km SSO de McKinleyville (Humboldt County) (pop: 15,200) --> Voir les séismes à proximité!
186 km O de Redding (pop: 91,600) --> Voir les séismes à proximité!
245 km NO de Windsor (Sonoma County) (pop: 27,500) --> Voir les séismes à proximité!
Weather at epicenter at time of quake:
Overcast Clouds
10.4°C (51 F), humidity: 71%, wind: 5 m/s (10 kts) from SE
Primary data source: USGS (United States Geological Survey)Overcast Clouds
10.4°C (51 F), humidity: 71%, wind: 5 m/s (10 kts) from SEEstimated released energy: 1.4 x 109 joules (392 kilowatt hours, equivalent to 0.338 tons of TNT) Plus d'infos
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 | Profondeur | Lieu | Source |
| 2.9 | 21 km | 23km W of Petrolia, CA, USA | USGS |
| 3.0 | 20 km | OFFSHORE NORTHERN CALIFORNIA, USA | EMSC |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
At magnitude 2.9, this quake might have been felt very close to the epicenter and under calm conditions.There are no user reports for this quake yet. If you felt it be the first to report it!
Earlier earthquakes in the same area
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