Weak mag. 3.0 earthquake - 22 mi southeast of Graham, Pierce County, Washington, USA, on Thursday, Nov 4, 2021 at 1:29 am (GMT -7) -

Weak mag. 3.0 earthquake - 22 mi southeast of Graham, Pierce County, Washington, USA, on Thursday, Nov 4, 2021 at 1:29 am (GMT -7) Weak mag. 3.0 earthquake - 22 mi southeast of Graham, Pierce County, Washington, USA, on Thursday, Nov 4, 2021 at 1:29 am (GMT -7)

Weak magnitude 3.0 earthquake at 15 km depth

4 Nov 08:33 UTC: First to report: USGS after 4 minutes.
4 Nov 15:36: Magnitude recalculated from 3.1 to 3.0. Hypocenter depth recalculated from 15.3 to 15.1 km (from 9.5 to 9.4 mi). Epicenter location corrected by 0.7 km (0.4 mi) towards SE.
Update Thu, 4 Nov 2021, 08:39
Small magnitude 3.1 earthquake 21 miles southeast of Graham, Washington, United States
3.1 quake 4 Nov 1:29 am (GMT -7)
3.1 quake 4 Nov 1:29 am (GMT -7)
An earthquake of magnitude 3.1 occurred only 10 minutes ago 21 miles southeast of Graham, Washington, United States, the United States Geological Survey reported.
The quake hit at a shallow depth of 9.5 miles beneath the epicenter near Graham, Pierce County, Washington, USA, early morning on Thursday, November 4th, 2021, at 1:29 am local time. 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 European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 3.1 earthquake as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Ashford (pop. 220) located 4 miles from the epicenter. In Graham (pop. 23,500, 21 miles away), Frederickson (pop. 18,700, 25 miles away), South Hill (pop. 52,400, 27 miles away), Spanaway (pop. 27,200, 28 miles away), Puyallup (pop. 39,700, 30 miles away), Parkland (pop. 35,800, 31 miles away), Puyallup (pop. 207,900, 37 miles away), Olympia (pop. 50,300, 42 miles away), and Kent (pop. 127,000, 43 miles away), the quake was probably not felt.

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Earthquake data

Earthquake details

Date & timeNov 4, 2021 08:29:26 UTC -
Local time at epicenterThursday, Nov 4, 2021 at 1:29 am (GMT -7)
StatusConfirmed
Magnitude3
Depth15.1 km
Epicenter latitude / longitude46.76733°N / 122.10033°W (Pierce, Washington, United States)
Antipode46.767°S / 57.9°E
Shaking intensityWeak shaking
Felt5 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoMount Rainier (28 km / 17 mi)
Nearby towns and cities5 km (3 mi) W of Ashford (pop: 217) | Show on map | Quakes nearby
35 km (22 mi) SSE of Graham (Pierce County) (pop: 23,500) | Show on map | Quakes nearby
42 km (26 mi) SSE of Frederickson (Pierce County) (pop: 18,700) | Show on map | Quakes nearby
44 km (27 mi) SSE of South Hill (pop: 52,400) | Show on map | Quakes nearby
45 km (28 mi) SE of Lake Park (pop: 27,200) | Show on map | Quakes nearby
49 km (30 mi) SSE of Puyallup (pop: 39,700) | Show on map | Quakes nearby
60 km (37 mi) SSE of Tacoma (pop: 207,900) | Show on map | Quakes nearby
64 km (40 mi) SSE of Federal Way (pop: 95,200) | Show on map | Quakes nearby
68 km (42 mi) ESE of Olympia (pop: 50,300) | Show on map | Quakes nearby
69 km (43 mi) S of Kent (pop: 127,000) | Show on map | Quakes nearby
Weather at epicenter at time of quakeLight Rain 8.3°C (47 F), humidity: 95%, wind: 3 m/s (6 kts) from ESE
Estimated seismic energy released2 x 109 joules (554 kilowatt hours, equivalent to 0.477 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
3.015 km5 Km W of Ashford, WashingtonUSGS
2.816 kmWASHINGTONEMSC

User reports for this quake (5)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Eatonville / Very weak shaking (MMI II) / single lateral shake / 2-5 s : Eatonville is located south of Graham - maybe 19 miles. All the descriptions seem to say it was located close to Eatonville but they don't even mention it.  
Ashford WA / Weak shaking (MMI III) : Woke from sleep by what sounded like a distant boom and the sound of something shuffling quickly through the house. It was dark so couldn't see anything shaking. Just checked this sight to confirm it wasn't a dream! Thanks.  
Eatonville / Weak shaking (MMI III) / rattling, vibrating / 2-5 s
Mineral, WA / Light shaking (MMI IV) / 1-2 s : Accompanied by a loud boom, similar to thunder.  
Eatonville / Weak shaking (MMI III) / rattling, vibrating / 2-5 s
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