Weak mag. 3.0 earthquake - North Pacific Ocean, 5.1 mi northwest of Eureka, Humboldt County, California, USA, on Tuesday, 4 May 2021 12:37 am (GMT -7) -

Weak mag. 3.0 earthquake - North Pacific Ocean, 5.1 mi northwest of Eureka, Humboldt County, California, USA, on Tuesday, 4 May 2021 12:37 am (GMT -7)

Weak magnitude 3.0 earthquake at 24 km depth

4 May 07:39 UTC: First to report: USGS after 2 minutes.
Update Tue, 4 May 2021, 07:45
Small magnitude 3.0 earthquake 5 miles northwest of Eureka, California, United States
3.0 quake 4 May 12:37 am (GMT -7)
3.0 quake 4 May 12:37 am (GMT -7)
Just 7 minutes ago, a 3.0-magnitude earthquake struck near Eureka, Humboldt County, California, USA. The tremor was recorded after midnight on Tuesday 4 May 2021 at 12:37 am local time, at a shallow depth of 15 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 3.0 earthquake as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Samoa (pop. 260) located 3 miles from the epicenter, Eureka (pop. 27,000) 5 miles away, Humboldt Hill (pop. 3,400) 8 miles away, Pine Hills (pop. 3,100) 9 miles away, and Arcata (pop. 17,800) 9 miles away. In Bayside (pop. 17,100, 10 miles away), McKinleyville (pop. 15,200, 11 miles away), and Fortuna (pop. 12,000, 17 miles away), the quake was probably not felt.
Download the Volcanoes & Earthquakes app to get one of the fastest seismic alerts online:
Android | IOS

Earthquake data:

Date & time: 4 May 2021 07:37:40 UTC -
Local time at epicenter: Tuesday, 4 May 2021 12:37 am (GMT -7)
Magnitude: 3
Depth: 23.6 km
Epicenter latitude / longitude: 40.83733°N / 124.24834°W (North Pacific Ocean, California, United States)
Nearest volcano: Mount Shasta (183 km / 114 mi)
Nearby towns and cities:
6 km (3 mi) WNW of Samoa (pop: 258) --> See nearby quakes!
8 km (5 mi) WNW of Eureka (Humboldt County) (pop: 27,000) --> See nearby quakes!
14 km (9 mi) WSW of Arcata (Humboldt County) (pop: 17,800) --> See nearby quakes!
16 km (10 mi) W of Bayside (Humboldt County) (pop: 17,100) --> See nearby quakes!
17 km (11 mi) SW of McKinleyville (Humboldt County) (pop: 15,200) --> See nearby quakes!
26 km (16 mi) SSW of Westhaven-Moonstone (pop: 1,210) --> See nearby quakes!
28 km (17 mi) NNW of Fortuna (Humboldt County) (pop: 12,000) --> See nearby quakes!
39 km (25 mi) NNW of Rio Dell (pop: 3,390) --> See nearby quakes!
159 km (99 mi) W of Redding (pop: 91,600) --> See nearby quakes!
201 km (125 mi) SW of Medford (Oregon) (pop: 79,800) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2 x 109 joules (554 kilowatt hours, equivalent to 0.477 tons of TNT) More info
Show interactive Map
[smaller] [bigger]
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!
Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake 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.
MagnitudeDepthLocationSource
3.024 km9km NW of Eureka, CA, USAUSGS
2.522 kmOFFSHORE NORTHERN CALIFORNIA, USAEMSC
unspecifiedn/aNear Eureka, California, USAVolcanoDiscovery

User reports for this quake (7)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Contribute:
Leave a comment if you find a particular report interesting or want to add to it.
Flag as inappropriate.
Mark as helpful or interesting.
Send your own user report!
14.1 km ENE of epicenter [Map] / Light shaking (MMI IV) / single lateral shake / 1-2 s : Felt one jolt like someone slammed a big door. Could have knocked things over if it went back and forth. | One user found this interesting.  
Arcata,ca / Light shaking (MMI IV) / single vertical bump / 2-5 s : Woke me up | One user found this interesting.  
Eureka / Very weak shaking (MMI II) / single lateral shake / very short : A single jolt as the house creaked. | One user found this interesting.  
compton / Very weak shaking (MMI II) / complex rolling (tilting in multiple directions) / 5-10 s
Eureka, California (king salmon) / Light shaking (MMI IV) / single vertical bump / very short
Kneeland, CA / Light shaking (MMI IV)
Arcata / Light shaking (MMI IV) / single lateral shake / 1-2 s
Volcanoes & Earthquakes - new app for Android

Earlier earthquakes in the same area

Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version
Why is there advertising on this site?
Support us - Help us upgrade our services!
We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Weather reports
  • Tsunami alerts
  • Design upgrades
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Additional seismic data sources
  • Improved content in English
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Copyrights: VolcanoDiscovery and other sources as noted.
Use of material: Most texts and images, in particular photographs, on this website are protected by copyright. Further reproduction and use of without authorization is usually not consented. If you are not sure or need licensing rights for photographs, for example for publications and commercial use, please contact us.