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Light mag. 3.7 earthquake - 25 mi northwest of Seattle, King County, Washington, USA, on Thursday, Sep 8, 2022 at 1:08 am (GMT -7) -

Light mag. 3.7 earthquake - 25 mi northwest of Seattle, King County, Washington, USA, on Thursday, Sep 8, 2022 at 1:08 am (GMT -7) Light mag. 3.7 earthquake - 25 mi northwest of Seattle, King County, Washington, USA, on Thursday, Sep 8, 2022 at 1:08 am (GMT -7)

Light magnitude 3.7 earthquake at 23 km depth

8 Sep 08:11 UTC: First to report: VolcanoDiscovery after 3 minutes.
8 Sep 08:13: Now using data updates from EMSC
... [show all] ...
8 Sep 17:10: Hypocenter depth recalculated from 23.5 to 23.3 km (from 14.6 to 14.5 mi). Epicenter location corrected by 0.5 km (0.3 mi) towards N.
Update Thu, 8 Sep 2022, 08:21

Small magnitude 3.8 earthquake 25 miles northwest of Seattle, Washington, United States

3.8 quake 8 Sep 1:08 am (GMT -7)
3.8 quake 8 Sep 1:08 am (GMT -7)
A shallow magnitude 3.8 earthquake was reported early morning near Seattle, Comté de King County, Washington, USA.
According to the United States Geological Survey, the quake hit on Thursday, September 8th, 2022, at 1:08 am local time at a shallow depth of 14 miles. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. 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 citizen-seismograph network of RaspberryShake which listed the quake at magnitude 3.8 as well. A third agency, the European-Mediterranean Seismological Centre (EMSC), reported the same quake at magnitude 3.8.
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 Lofall (pop. 2,300) located 4 miles from the epicenter.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Silverdale (pop. 19,200) located 13 miles from the epicenter, Edmonds (pop. 41,400) 17 miles away, Bremerton (pop. 39,500) 19 miles away, Shoreline (pop. 55,400) 19 miles away, Lynnwood (pop. 37,000) 20 miles away, Seattle (pop. 684,500) 25 miles away, Kirkland (pop. 87,300) 27 miles away, Everett (pop. 108,000) 27 miles away, and Bellevue (pop. 139,800) 29 miles away.

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Earthquake details

Date & timeSep 8, 2022 08:08:25 UTC -
Local time at epicenterThursday, Sep 8, 2022 at 1:08 am (GMT -7)
StatusConfirmed
Magnitude3.7
Depth23.3 km
Epicenter latitude / longitude47.842°N / 122.75167°W (Jefferson, Washington, United States)
Antipode47.842°S / 57.248°E
Shaking intensityWeak shaking near epicenter
Felt0 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoMount Baker (125 km / 78 mi)
Nearby towns and cities8 km (5 mi) WNW of Lofall (pop: 2,290) | Show on map | Quakes nearby
28 km (18 mi) W of Edmonds (pop: 41,400) | Show on map | Quakes nearby
32 km (20 mi) NNW of Bremerton (pop: 39,500) | Show on map | Quakes nearby
32 km (20 mi) WNW of Shoreline (pop: 55,400) | Show on map | Quakes nearby
41 km (25 mi) NW of Seattle (pop: 684,500) | Show on map | Quakes nearby
44 km (27 mi) WSW of Everett (pop: 108,000) | Show on map | Quakes nearby
44 km (28 mi) WNW of Kirkland (pop: 87,300) | Show on map | Quakes nearby
49 km (30 mi) WNW of Bellevue (pop: 139,800) | Show on map | Quakes nearby
Weather at epicenter at time of quakeClear Sky 12.1°C (54 F), humidity: 82%, wind: 1 m/s (2 kts) from WSW
Estimated seismic energy released2.2 x 1010 joules (6.22 megawatt hours, equivalent to 5.35 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.
Mag.DepthLocationSource
3.723 km7 Km WNW of Lofall, WashingtonUSGS
3.527 kmPUGET SOUND REGION, WASHINGTONEMSC
3.723 kmWashingtonRaspberryShake
3.423 km39 Km NW of Seattle, Washington, USANRCAN

Seismograms

Seismic station: Electron Hydro (TRON/CC network) | Distance from quake: 103 km / 64 mi | Show on map | Station Info
Seismic station Electron Hydro: 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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