Light mag. 4.0 earthquake - 12 mi southeast of Elmendorf Air Force Base, Alaska, USA, on 15 Oct 8:05 am (GMT -8) -

Light mag. 4.0 earthquake - 12 mi southeast of Elmendorf Air Force Base, Alaska, USA, on 15 Oct 8:05 am (GMT -8)

Light magnitude 4.0 earthquake at 18 km depth

15 Oct 16:08 UTC: First to report: USGS after 3 minutes.
15 Oct 16:10: Hypocenter depth recalculated from 19.5 to 18.7 km (from 12.1 to 11.6 mi).
... [show all] ...
15 Oct 16:21: Magnitude recalculated from 4.2 to 4.0. Hypocenter depth recalculated from 16.9 to 18.1 km (from 10.5 to 11.2 mi). Epicenter location corrected by 4.4 km (2.7 mi) towards N.
Date & time: Oct 15, 2020 16:05:15 UTC -
Local time at epicenter: 15 Oct 8:05 am (GMT -8)
Magnitude: 4
Depth: 18.1 km
Epicenter latitude / longitude: 61.1631°N / 149.336°W (Anchorage, Alaska, United States)
Antipode: 61.163°S / 30.664°E
Nearest volcano: Spurr (157 km / 98 mi)
Nearby towns and cities:
19 km (12 mi) ESE of Elmendorf Air Force Base (pop: 6,620) --> See nearby quakes!
22 km (13 mi) SE of Eagle River (pop: 24,800) --> See nearby quakes!
22 km (13 mi) SE of Eagle River (Anchorage) (pop: 24,800) --> See nearby quakes!
26 km (16 mi) NNW of Girdwood (pop: 2,250) --> See nearby quakes!
31 km (19 mi) E of Alaska City (pop: 298,700) --> See nearby quakes!
41 km (26 mi) SSE of Knik-Fairview (pop: 14,900) --> See nearby quakes!
47 km (29 mi) S of Wasilla (pop: 9,280) --> See nearby quakes!
50 km (31 mi) SSW of Palmer (pop: 6,790) --> See nearby quakes!
52 km (32 mi) SE of Big Lake (pop: 3,350) --> See nearby quakes!
65 km (40 mi) S of Fishhook (pop: 4,680) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky 0.7°C (33 F), humidity: 96%, wind: 0 m/s (1 kts) from E
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 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
4.018 km21 Km SE of Elmendorf Air Force Base, Alaska, USAUSGS
4.240 kmSouthern Alaska, USAEMSC

User reports for this quake (83)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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1797 W River Dr, Eagle River 99577 (10.5 km NW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 5-10 s : I am not a light sleeper, but it woke me. I sleep | One user found this interesting.  
Lakes, Matanuska-Susitna, Alaska (49 km N of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)
Alaska City, Anchorage (27.9 km W of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)
Wasilla, Matanuska-Susitna, Alaska (43.7 km N of epicenter) [Map] / Very weak shaking (MMI II) / very short
Alaska City, Anchorage (29.1 km W of epicenter) [Map] / Very weak shaking (MMI II) / 1-2 s (reported through our app)
Alaska City, Anchorage (25.3 km W of epicenter) [Map] / Moderate shaking (MMI V) / single lateral shake (reported through our app)
Elmendorf Air Force Base, Anchorage County, Alaska (22.1 km WNW of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating (reported through our app)
Eagle River (22.5 km NNW of epicenter) [Map] / Light shaking (MMI IV) / single vertical bump / 1-2 s (reported through our app)
Eagle River, Anchorage, Alaska (23.5 km NNW of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)
Wasilla (47.2 km N of epicenter) [Map] / Light shaking (MMI IV) / single vertical bump / very short : Very quick, loud, hard bump and shake (reported through our app)  
Gateway, Matanuska-Susitna, Alaska (47.9 km N of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s
Alaska City, Anchorage (21.8 km W of epicenter) [Map] / Very weak shaking (MMI II) (reported through our app)
N PARK, ANCHORAGE AK (25.8 km WNW of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / very short
Alaska City, Anchorage (27.8 km W of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / very short (reported through our app)
Anchorage, AK, United States (23.9 km WSW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s (reported through our app)
Knik-Fairview, Matanuska-Susitna, Alaska (40.8 km NNW of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s (reported through our app)
Palmer (51.7 km N of epicenter) [Map] / Light shaking (MMI IV) : Shook enough to wake me up. (reported through our app)  
Eagle River, Anchorage, Alaska (24.4 km NNW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 2-5 s (reported through our app)
near Eagle River, Anchorage, Alaska (27.7 km NNW of epicenter) [Map] / Moderate shaking (MMI V) / vibration and rolling / 5-10 s : Shhok the bed and opened a door. Lasted about 6-7 seconds.  
Eagle River, Anchorage, Alaska (20.5 km NW of epicenter) [Map] / Light shaking (MMI IV) / 1-2 s (reported through our app)
Anchorage (Tudor and Baxter) (23.1 km W of epicenter) [Map] / Moderate shaking (MMI V) / single lateral shake / 1-2 s : Jolt, then moderate, but very short, shaking. (reported through our app)  
Knik-Fairview, Matanuska-Susitna, Alaska (42.9 km NNW of epicenter) [Map] / not felt / single vertical bump / 1-2 s (reported through our app)
Elmendorf Air Force Base, Anchorage County, Alaska (21.9 km WNW of epicenter) [Map] / Moderate shaking (MMI V)
Fishhook Alaska (58.6 km N of epicenter) [Map] / Weak shaking (MMI III) / 2-5 s (reported through our app)
Eagle River, Anchorage, Alaska (22.4 km NW of epicenter) [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging / 20-30 s
near Alaska City, Anchorage (22.9 km W of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)
Big Lake, Matanuska-Susitna, Alaska (49.7 km NNW of epicenter) [Map] / Light shaking (MMI IV) / very short (reported through our app)
Alaska City, Anchorage (28.1 km W of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / very short (reported through our app)
Alaska City, Anchorage (22.7 km WNW of epicenter) [Map] / Moderate shaking (MMI V) (reported through our app)
Eagle River / Light shaking (MMI IV) / 1-2 s : Two sharp | 3 users found this interesting.  
Anchorage / Very weak shaking (MMI II) / single lateral shake / 1-2 s : I live on in an apartment building on the top of a very steep hill. The apartment building was built here at least 30 yrs. ago, I believe. The building felt very sturdy & safe throughout the brief lateral weak shaking.  
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