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Minor mag. 3.8 earthquake - 17 Km N of Susitna, Alaska, USA on Sunday, 11 October 2020

Minor mag. 3.8 earthquake  - 17 Km N of Susitna, Alaska, USA on Sunday, 11 October 2020
11 Oct 21:59 UTC: First to report: USGS after 3 minutes.
11 Oct 22:00: Hypocenter depth recalculated from 55.2 to 49.9 km (from 34 to 31 mi). Epicenter location corrected by 1.6 km (1 mi) towards S.
11 Oct 23:08: Magnitude recalculated from 3.9 to 3.8. Hypocenter depth recalculated from 49.9 to 56.4 km (from 31 to 35 mi). Epicenter location corrected by 2.7 km (1.7 mi) towards NW.
Date & time: Sunday, 11 October 2020 21:55 UTC
Local time at epicenter: 11 Oct 1:55 pm (GMT -8)
Magnitude: 3.8
Depth: 56.4 km
Epicenter latitude / longitude: 61.6981°N / 150.5011°W (Alaska, United States)
Nearest volcano: Hayes (103 km / 64 mi)
Nearby towns and cities:
25 km (16 mi) SW of Willow (pop: 2,100)
35 km (22 mi) NW of Big Lake (pop: 3,400)
37 km (23 mi) NW of Houston (pop: 2,200)
52 km (32 mi) NW of Knik-Fairview (pop: 14,900)
62 km (39 mi) NW of Anchorage (pop: 298,700)
65 km (40 mi) NW of Eagle River (pop: 24,800)
Weather at epicenter at time of quake:
Overcast Clouds 7.2°C (45 F), humidity: 71%, wind: 0 m/s (1 kts) from NW
Primary data source: USGS
Estimated released energy: 3.2 x 1010 joules (8.78 megawatt hours, equivalent to 7.56 tons of TNT) [learn more]
If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
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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.
TimeMag. / DepthLocationSource
11 Oct 1:55 pm (GMT -8) (11 Oct 21:55:35 UTC)M 3.8 / 56.4 km17 Km N of Susitna, Alaska, USAUSGS
Sun, 11 Oct 21:55 UTCM 4.0 / 60 kmSouthern Alaska, USAEMSC

User reports for this quake (22)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Anchorage (70.4 km SSE of epicenter) [Map] / Moderate shaking (MMI V) : Heard the shaking and my house rattling but where I was sitting at the west end of my house I felt almost no movement. (reported through our app)
66.6 km E of epicenter [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s : Vibrated for a couple seconds. Then shook the house sideways increasingly till I almost went outside. Then stopped
50.6 km ESE of epicenter [Map] / not felt (reported through our app)
69.8 km SSE of epicenter [Map] / Very weak shaking (MMI II) (reported through our app)
Anchorage (65.8 km SSE of epicenter) [Map] / Light shaking (MMI IV) : Light pulsating vibrations.
Lower hillside (75.5 km SSE of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)
Peters Creek (64.2 km ESE of epicenter) [Map] / Weak shaking (MMI III) : More noise than shaking. (reported through our app)
CHUGIAK Peter's Creek (64.6 km ESE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 1-2 s
75 km SSE of epicenter [Map] / Light shaking (MMI IV) / 10-15 s
67.8 km SSE of epicenter [Map] / Very weak shaking (MMI II) / single lateral shake / very short (reported through our app)
Wasilla (61.6 km E of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / 1-2 s (reported through our app)
Anchorage / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s : I was taking a nap for a late departing flight and was awakened by the shaking.
Anchorage / Light shaking (MMI IV) / 1-2 s
Anchorage / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s
Eagle River (United States, 68 km SE of epicenter) : House shook & creaked like it was a gust of wind (reported through EMSC)
Eagle River (United States, 68 km SE of epicenter) : That was a quick shock followed by shaking for 3 or 4 seconds, at about 1:56 pm. (reported through EMSC)
Eagle River (United States, 68 km SE of epicenter) : Everything in the house was rattling. (reported through EMSC)
Elmendorf Air Force Base (United States, 71 km SE of epicenter) : One jolt felt by everyone then light vibration shake lasting 30 seconds more (reported through EMSC)
Eagle River (United States, 68 km SE of epicenter) : That was a quick shock followed by shaking for 3 or 4 seconds, at about 1:56 pm.Posred at 1:59 pm. Reposted at 2:03 pm. (reported through EMSC)
Eagle River (United States, 68 km SE of epicenter) : Rumble and a quick shake (reported through EMSC)
Anchorage (United States, 66 km SE of epicenter) : Was sitting outside the store in my car with the engine off. Thought someone was pushing on my car to shake it. Rocked back and forth a couple times, but no one around me. (reported through EMSC)
Anchorage (United States, 66 km SE of epicenter) : Wobbled the cat tree. Heard the rumbling over the ceiling fan (reported through EMSC)

Earlier earthquakes in the same area since 1900

Minor mag. 3.8 earthquake - 17 Km N of Susitna, Alaska, USA on Sunday, 11 October 2020

Map of earlier quakes

 

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