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Moderate mag. 4.9 earthquake - 54 mi east of Palmer, Matanuska-Susitna, Alaska, USA, on Thursday, Oct 6, 2022 at 12:43 pm (GMT -8) -

Moderate mag. 4.9 earthquake - 54 mi east of Palmer, Matanuska-Susitna, Alaska, USA, on Thursday, Oct 6, 2022 at 12:43 pm (GMT -8) Moderate mag. 4.9 earthquake - 54 mi east of Palmer, Matanuska-Susitna, Alaska, USA, on Thursday, Oct 6, 2022 at 12:43 pm (GMT -8)

Moderate magnitude 4.9 earthquake at 35 km depth

6 Oct 20:45 UTC: First to report: USGS after 2 minutes.
6 Oct 20:53: Hypocenter depth recalculated from 34.8 to 34.9 km (from 22 to 22 mi). Epicenter location corrected by 1.4 km (0.9 mi) towards NE.
Update Thu, 6 Oct 2022, 20:51

Moderate magnitude 4.9 quake hits 53 miles northeast of Palmer, Alaska, United States around noon

4.9 quake 6 Oct 12:43 pm (GMT -8)
4.9 quake 6 Oct 12:43 pm (GMT -8)
A moderately shallow magnitude 4.9 earthquake was reported around noon near Palmer, Matanuska-Susitna, Alaska, USA.
According to the United States Geological Survey, the quake hit on Thursday, October 6th, 2022, at 12:43 pm local time at a moderately shallow depth of 22 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.
Our monitoring service identified a second report from The Incorporated Research Institutions for Seismology (IRIS) which listed the quake at magnitude 4.9 as well. Other agencies reporting the same quake include the citizen-seismograph network of RaspberryShake at magnitude 4.9, and the European-Mediterranean Seismological Centre (EMSC) at magnitude 5.5.
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 Glacier View (pop. 230) located 3 miles from the epicenter, Sutton-Alpine (pop. 1,400) 39 miles away, Lazy Mountain (pop. 1,500) 47 miles away, Butte (pop. 3,200) 52 miles away, Palmer (pop. 6,800) 53 miles away, Fishhook (pop. 4,700) 55 miles away, Gateway (pop. 5,600) 58 miles away, and Lakes (pop. 8,400) 59 miles away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Eagle River (pop. 24,800) located 75 miles from the epicenter.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.

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Earthquake details

Date & timeOct 6, 2022 20:43:13 UTC -
Local time at epicenterThursday, Oct 6, 2022 at 12:43 pm (GMT -8)
StatusConfirmed
Magnitude4.9
Depth34.9 km
Epicenter latitude / longitude61.8387°N / 147.5485°W (Matanuska-Susitna, Alaska, United States)
Antipode61.839°S / 32.452°E
Shaking intensityWeak shaking
Felt48 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoWrangell (186 km / 116 mi)
Nearby towns and cities6 km (4 mi) ENE of Glacier View (pop: 234) | Show on map | Quakes nearby
64 km (40 mi) E of Sutton-Alpine (pop: 1,450) | Show on map | Quakes nearby
87 km (54 mi) ENE of Palmer (pop: 6,790) | Show on map | Quakes nearby
89 km (56 mi) E of Fishhook (pop: 4,680) | Show on map | Quakes nearby
96 km (60 mi) ENE of Lakes (pop: 8,360) | Show on map | Quakes nearby
121 km (75 mi) ENE of Eagle River (pop: 24,800) | Show on map | Quakes nearby
121 km (75 mi) ENE of Eagle River (Anchorage) (pop: 24,800) | Show on map | Quakes nearby
143 km (89 mi) ENE of Alaska City (pop: 298,700) | Show on map | Quakes nearby
Weather at epicenter at time of quakeFew Clouds 1.6°C (35 F), humidity: 72%, wind: 2 m/s (5 kts) from SW
Estimated seismic energy released1.4 x 1012 joules (392 megawatt hours, equivalent to 338 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
4.935 kmSouthern AlaskaUSGS
4.849 kmSOUTHERN ALASKAEMSC
4.935 kmSouthern AlaskaRaspberryShake
4.910 kmSouthern AlaskaIRIS
4.841 kmSouthern AlaskaGFZ

Seismograms

Seismic station: ILAR Array, Site 31, Eielson, AK, USA (IL31/IM network) | Distance from quake: 328 km / 204 mi | Show on map | Station Info
Seismic station ILAR Array, Site 31, Eielson, AK, USA: 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 (49)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Eagle River, Anchorage, Alaska (121.2 km WSW of epicenter) [Map] / Light shaking (MMI IV) : Was laying down watching tv, walls and sofa started to shake felt like vigours. Only lasted about 5 seconds. | One user found this interesting.  
near Alaska City, Anchorage (141.6 km WSW of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 5-10 s : Staybridge Suites 3rd floor room.shaking side to side also forward and aft sitting on couch | 2 users found this interesting.  
30 km of Susitna North, Matanuska-Susitna, Alaska (135 km WNW of epicenter) [Map] / Weak shaking (MMI III) / vibration and rolling / 2-5 s : Just felt like when a tree would fall on the ground and bounce | 2 users found this interesting. (reported through our app)  
Eagle River AK / Weak shaking (MMI III) / rattling, vibrating / 5-10 s : I was sitting on my couch downstairs and felt the couch shake, heard a rumbling noise and thought it was my big dogs upstairs but noticed they were downstairs. | One user found this interesting.  
Wasilla, Matanuska-Susitna, Alaska (104.9 km WSW of epicenter) [Map] / Very weak shaking (MMI II) / single vertical bump / very short : I was asleep but it felt like a jolt that caused me sit sit up quickly and reach for my dog to be ready to take cover if it continued  
Anchorage Alaska 99507, mid town / not felt / single lateral shake / 1-2 s : Yes I felt it. Was in shower, the shower caddi fell. | 2 users found this interesting. (reported through our app)  
Anchorage / Light shaking (MMI IV) / horizontal (sideways) swinging / 10-15 s : It felt long in its roll and subtle. No jolts. | One user found this interesting.  
Eagle River / Moderate shaking (MMI V) / single vertical bump / 1-2 s : It felt like the house dropped 2 feet down. | One user found this interesting.  
Anchorage (143.1 km WSW of epicenter) [Map] / Very weak shaking (MMI II) / vibration and rolling / 5-10 s
Palmer Alaska (86.8 km WSW of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake / very short : It felt like a light quick shake that woke me up. I’m a day sleeper.  
Hope (152.4 km SW of epicenter) [Map] / Light shaking (MMI IV) / simple rolling (tilting sideways along one direction) / 30-60 s
Palmer Alaska (86.8 km WSW of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake / very short : It felt like a light quick shake that woke me up. I’m a day sleeper.  
Anchorage, ak (148.8 km WSW of epicenter) [Map] / Weak shaking (MMI III) / single lateral shake / 1-2 s : Fronds of my potted fern trembled for ~10 seconds after shaking stopped.  
Alaska City, Anchorage (135.7 km WSW of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s (reported through our app)
Eagle River (120.7 km WSW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : Light to moderate. (reported through our app)  
gateway, ak (97.3 km WSW of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake / 2-5 s : Shook objects and window blinds laterally.  
Palmer, Ak (57 km SW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
99503 (139.1 km WSW of epicenter) [Map] / Weak shaking (MMI III) : rocking in my chair. office shook like waving back and forth  
anchorage (121.3 km WSW of epicenter) [Map] / Light shaking (MMI IV) / 1-2 s : In my office. Felt a very strong brief shaking.  
Wasilla, AK (100.9 km WSW of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s
Wasilla (97.3 km WSW of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 10-15 s : Pipes and toilet in bathroom shaking  
Knik-Fairview, Matanuska-Susitna, Alaska (123.2 km WSW of epicenter) [Map] / Light shaking (MMI IV) / vibration and rolling / 15-20 s (reported through our app)
Valdez, AK / Moderate shaking (MMI V) / vibration and rolling / 1-2 s
Wasilla, Alaska / Very weak shaking (MMI II) / 5-10 s : Subtle movement of dining room, chandelier barely swinging.  
Wasilla / Very weak shaking (MMI II) / both vertical and horizontal swinging / 2-5 s (reported through our app)
Anchorage / Very weak shaking (MMI II) / single vertical bump / 1-2 s (reported through our app)
Anchorage / Light shaking (MMI IV) / single lateral shake / 5-10 s (reported through our app)
Jber / Weak shaking (MMI III) / single lateral shake : Jolt (reported through our app)  
99645 / Light shaking (MMI IV) / 1-2 s
Anchorage / Weak shaking (MMI III) / 2-5 s (reported through our app)
Anchorage / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
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