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Moderate mag. 4.3 earthquake - North Pacific Ocean, Oregon, 152 mi northwest of Eureka, Humboldt County, California, USA, on Tuesday, Aug 9, 2022 at 6:40 am (GMT -8) -

Moderate mag. 4.3 earthquake - North Pacific Ocean, Oregon, 152 mi northwest of Eureka, Humboldt County, California, USA, on Tuesday, Aug 9, 2022 at 6:40 am (GMT -8) Moderate mag. 4.3 earthquake - North Pacific Ocean, Oregon, 152 mi northwest of Eureka, Humboldt County, California, USA, on Tuesday, Aug 9, 2022 at 6:40 am (GMT -8)

Moderate magnitude 4.3 earthquake at 10 km depth

9 Aug 14:51 UTC: First to report: EMSC after 10 minutes.
9 Aug 14:51: Now using data updates from USGS
9 Aug 15:22: Magnitude recalculated from 3.2 to 4.3. Epicenter location corrected by 1.4 km (0.9 mi) towards W.
9 Aug 18:38: Epicenter location corrected by 1.8 km (1.1 mi) towards WSW.

Earthquake details

Date & timeAug 9, 2022 14:40:47 UTC -
Local time at epicenterTuesday, Aug 9, 2022 at 6:40 am (GMT -8)
StatusConfirmed
Magnitude4.3
Depth10.0 km
Epicenter latitude / longitude41.8714°N / 126.7177°W (North Pacific Ocean, Oregon, United States)
Antipode41.871°S / 53.282°E
Shaking intensityLight shaking near epicenter
Felt0 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoJackson Ridge (41 km / 25 mi)
Nearby towns and cities199 km (123 mi) WSW of Ellensburg (pop: 2,280) | Show on map | Quakes nearby
241 km (150 mi) WNW of McKinleyville (Humboldt County, California) (pop: 15,200) | Show on map | Quakes nearby
244 km (152 mi) WNW of Eureka (Humboldt County, California) (pop: 27,000) | Show on map | Quakes nearby
247 km (153 mi) WNW of Arcata (Humboldt County, California) (pop: 17,800) | Show on map | Quakes nearby
249 km (155 mi) WNW of Bayside (Humboldt County, California) (pop: 17,100) | Show on map | Quakes nearby
264 km (164 mi) SW of Coos Bay (Coos County) (pop: 16,200) | Show on map | Quakes nearby
286 km (178 mi) WSW of Grants Pass (Josephine County) (pop: 37,100) | Show on map | Quakes nearby
314 km (195 mi) WSW of Roseburg (Douglas County) (pop: 22,100) | Show on map | Quakes nearby
Weather at epicenter at time of quakeClear Sky 16.3°C (61 F), humidity: 90%, wind: 1 m/s (3 kts) from NNE
Estimated seismic energy released1.8 x 1011 joules (49.4 megawatt hours, equivalent to 42.5 tons of TNT) | about seismic energy
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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.
Mag.DepthLocationSource
4.310 km197 Km WSW of Pistol River, OregonUSGS
4.310 kmOFF COAST OF NORTHERN CALIFORNIAEMSC
4.310 kmOff Coast of N. CaliforniaRaspberryShake

Seismograms

Seismic station: Corvallis, Oregon, USA (COR/IU network) | Distance from quake: 409 km / 254 mi | Show on map | Station Info
Seismic station Corvallis, Oregon, 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 (3)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Glorious Sprague River Oregon / not felt : Didnt feel it, but glad I don't live on the coast. This world is sinking. Jesus is THE life boat | One user found this interesting. (reported through our app)  
Corvallis / not felt (reported through our app)
Newport / not felt (reported through our app)

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