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Moderate mag. 4.8 earthquake - North Pacific Ocean, 45 mi southwest of Eureka, Humboldt County, California, USA, on Saturday, Sep 24, 2022 at 11:27 am (GMT -8) -

Moderate mag. 4.8 earthquake - North Pacific Ocean, 45 mi southwest of Eureka, Humboldt County, California, USA, on Saturday, Sep 24, 2022 at 11:27 am (GMT -8) Moderate mag. 4.8 earthquake - North Pacific Ocean, 45 mi southwest of Eureka, Humboldt County, California, USA, on Saturday, Sep 24, 2022 at 11:27 am (GMT -8)

Moderate magnitude 4.8 earthquake at 13 km depth

24 Sep 19:29 UTC: First to report: VolcanoDiscovery after 2 minutes.
24 Sep 19:32: Now using data updates from RaspberryShake
... [show all] ...
24 Sep 21:34: Hypocenter depth recalculated from 2.4 to 13.1 km (from 1.5 to 8.1 mi). Epicenter location corrected by 7.1 km (4.4 mi) towards E.
Update Sat, 24 Sep 2022, 19:39

Magnitude 4.8 earthquake strikes near Eureka, Humboldt County, California, USA

4.8 quake 24 Sep 11:27 am (GMT -8)
4.8 quake 24 Sep 11:27 am (GMT -8)
The United States Geological Survey reported a magnitude 4.8 quake in the United States near Eureka, Humboldt County, California, only 11 minutes ago. The earthquake hit in the morning on Saturday, September 24th, 2022, at 11:27 am local time at a very shallow depth of 1.5 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.
A second report was later issued by The Incorporated Research Institutions for Seismology (IRIS), which listed it as a magnitude 4.9 earthquake. Other agencies reporting the same quake include the citizen-seismograph network of RaspberryShake at magnitude 4.6, the citizen-seismograph network of RaspberryShake at magnitude 4.6, and the European-Mediterranean Seismological Centre (EMSC) at magnitude 4.8.
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 Ferndale (pop. 1,400) located 34 miles from the epicenter, Rio Dell (pop. 3,400) 39 miles away, Fortuna (pop. 12,000) 39 miles away, Humboldt Hill (pop. 3,400) 43 miles away, Pine Hills (pop. 3,100) 45 miles away, Eureka (pop. 27,000) 47 miles away, Bayside (pop. 17,100) 53 miles away, Arcata (pop. 17,800) 54 miles away, and McKinleyville (pop. 15,200) 57 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 details

Date & timeSep 24, 2022 19:27:39 UTC -
Local time at epicenterSaturday, Sep 24, 2022 at 11:27 am (GMT -8)
Depth13.1 km
Epicenter latitude / longitude40.31367°N / 124.7245°W (North Pacific Ocean, California, United States)
Antipode40.314°S / 55.276°E
Shaking intensityModerate shaking near epicenter
Felt0 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoClear Lake (224 km / 139 mi)
Nearby towns and cities49 km (30 mi) SW of Ferndale (pop: 1,370) | Show on map | Quakes nearby
57 km (36 mi) SW of Fortuna (Humboldt County) (pop: 12,000) | Show on map | Quakes nearby
72 km (45 mi) SW of Eureka (Humboldt County) (pop: 27,000) | Show on map | Quakes nearby
81 km (50 mi) SW of Bayside (Humboldt County) (pop: 17,100) | Show on map | Quakes nearby
82 km (51 mi) SW of Arcata (Humboldt County) (pop: 17,800) | Show on map | Quakes nearby
88 km (55 mi) SW of McKinleyville (Humboldt County) (pop: 15,200) | Show on map | Quakes nearby
200 km (124 mi) W of Redding (pop: 91,600) | Show on map | Quakes nearby
256 km (159 mi) NW of Windsor (Sonoma County) (pop: 27,500) | Show on map | Quakes nearby
Weather at epicenter at time of quakeClear Sky 16.7°C (62 F), humidity: 83%, wind: 6 m/s (12 kts) from N
Estimated seismic energy released1 x 1012 joules (278 megawatt hours, equivalent to 239 tons of TNT) | about seismic energy
Show interactive Map
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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.
4.813 km37km W of Petrolia, CAUSGS
4.813 km44km W of Petrolia, CARaspberryShake
4.910 kmNear Coast Of Northern Calif.IRIS
4.710 kmNear Coast of Northern CaliforniaGFZ


Seismic station: Columbia College, Columbia, CA, USA (CMB/BK network) | Distance from quake: 452 km / 281 mi | Show on map | Station Info
Seismic station Columbia College, Columbia, CA, USA: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.

Earlier earthquakes in the same area

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