Weak mag. 3.1 earthquake - Matanuska-Susitna Parish, 12 mi north of Alaska City, Anchorage, Alaska, USA, on Friday, Sep 24, 2021 12:34 pm (GMT -8) -

Weak mag. 3.1 earthquake - Matanuska-Susitna Parish, 12 mi north of Alaska City, Anchorage, Alaska, USA, on Friday, Sep 24, 2021 12:34 pm (GMT -8)

Weak magnitude 3.1 earthquake at 34 km depth

24 Sep 20:38 UTC: First to report: USGS after 4 minutes.
24 Sep 20:38: Magnitude recalculated from 3.4 to 3.3. Hypocenter depth recalculated from 39.1 to 36.1 km (from 24 to 22 mi). Epicenter location corrected by 59 km (37 mi) towards SE.
... [show all] ...
24 Sep 22:44: Magnitude recalculated from 3.3 to 3.1. Hypocenter depth recalculated from 17.8 to 33.5 km (from 11.1 to 21 mi). Epicenter location corrected by 5 km (3.1 mi) towards ESE.
Update Fri, 24 Sep 2021, 20:45
Small 3.3 quake hits near Alaska City, Anchorage, Alaska, USA
3.3 quake 24 Sep 12:34 pm (GMT -8)
3.3 quake 24 Sep 12:34 pm (GMT -8)
The United States Geological Survey reported a magnitude 3.3 quake in the United States near Alaska City, Anchorage, Alaska, only 10 minutes ago. The earthquake hit around noon on Friday, September 24th, 2021, at 12:34 pm local time at a shallow depth of 11 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 European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 3.3 earthquake as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Point MacKenzie (pop. 530) located 4 miles from the epicenter, Big Lake (pop. 3,400) 9 miles away, Alaska City (pop. 298,700) 14 miles away, Knik-Fairview (pop. 14,900) 18 miles away, Eagle River (pop. 24,800) 18 miles away, Eagle River (pop. 24,800) 18 miles away, Elmendorf Air Force Base (pop. 6,600) 18 miles away, and Meadow Lakes (pop. 7,600) 22 miles away. In Wasilla (pop. 9,300, 25 miles away), the quake was probably not felt.
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Earthquake data

Date & time: Sep 24, 2021 20:34:51 UTC -
Local time at epicenter: Friday, Sep 24, 2021 12:34 pm (GMT -8)
Magnitude: 3.1
Depth: 33.5 km
Epicenter latitude / longitude: 61.3803°N / 149.9902°W (Matanuska-Susitna, Alaska, United States)
Antipode: 61.38°S / 30.01°E
Nearest volcano: Spurr (117 km / 73 mi)
Nearby towns and cities:
2 km (1 mi) NNW of Point MacKenzie (pop: 529) --> See nearby quakes!
16 km (10 mi) S of Big Lake (pop: 3,350) --> See nearby quakes!
19 km (12 mi) NNW of Alaska City (pop: 298,700) --> See nearby quakes!
23 km (15 mi) WNW of Eagle River (pop: 24,800) --> See nearby quakes!
23 km (15 mi) WNW of Eagle River (Anchorage) (pop: 24,800) --> See nearby quakes!
25 km (16 mi) SW of Knik-Fairview (pop: 14,900) --> See nearby quakes!
29 km (18 mi) SSW of Houston (pop: 2,210) --> See nearby quakes!
37 km (23 mi) SW of Wasilla (pop: 9,280) --> See nearby quakes!
45 km (28 mi) WSW of Gateway (pop: 5,550) --> See nearby quakes!
932 km (579 mi) WNW of Juneau (pop: 32,800) --> See nearby quakes!
Weather at epicenter at time of quake:
Light Rain 1.6°C (35 F), humidity: 92%, wind: 2 m/s (4 kts) from S
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.8 x 109 joules (783 kilowatt hours, equivalent to 0.674 tons of TNT) More info
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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
3.134 kmSouthern AlaskaUSGS
3.134 kmSOUTHERN ALASKAEMSC

User reports for this quake (4)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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JBER / Weak shaking (MMI III) / rattling, vibrating / 2-5 s : Rumble and a vertical shake, then dishes rattled a little.  
Chugiak / Very weak shaking (MMI II) / 1-2 s (reported through our app)
JBER / Weak shaking (MMI III) / rattling, vibrating / 2-5 s : Rumble and a vertical shake, then dishes rattled a little.  
Palmer Ak / Moderate shaking (MMI V) / very short (reported through our app)
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