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Moderate mag. 4.2 earthquake - 10 mi southeast of Souda Springs, Caribou County, Idaho, USA, on Saturday, Jan 2, 2021 at 10:35 pm (GMT -7)

Moderate mag. 4.2 earthquake - 10 mi southeast of Souda Springs, Caribou County, Idaho, USA, on Saturday, Jan 2, 2021 at 10:35 pm (GMT -7) Moderate mag. 4.2 earthquake - 10 mi southeast of Souda Springs, Caribou County, Idaho, USA, on Saturday, Jan 2, 2021 at 10:35 pm (GMT -7)

Moderate magnitude 4.2 earthquake at 5 km depth

3 Jan 05:50 UTC: First to report: USGS after 15 minutes.
Update Sun, 3 Jan 2021, 05:57
Light 4.2 quake hits near Soda Springs, Caribou County, Idaho, United States
4.2 quake 2 Jan 10:35 pm (GMT -7)
4.2 quake 2 Jan 10:35 pm (GMT -7)
Just 22 minutes ago, a 4.2-magnitude earthquake struck near Soda Springs, Caribou County, Idaho, USA. The tremor was recorded late at night on Saturday 2 January 2021 at 10:35 pm local time, at a very shallow depth of 3.2 miles below the surface.
The event was filed by the United States Geological Survey (USGS), the first seismological agency to report it.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 4.2 as well.
Based on the preliminary seismic data, the quake was probably felt by many people in the area of the epicenter. It should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
In Georgetown (pop. 470) located 7 miles from the epicenter, the quake should have been felt as light shaking.
Weak shaking might have been felt in Soda Springs (pop. 2,900) located 10 miles from the epicenter, Georgetown (pop. 190) 14 miles away, Soda Springs (pop. 900) 14 miles away, and Paris (pop. 510) 23 miles away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Preston (pop. 5,200) located 39 miles from the epicenter, Pocatello (pop. 54,400) 55 miles away, and Logan (pop. 50,400) 60 miles away.

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Earthquake data

Earthquake details

Date & timeJan 3, 2021 05:35:27 UTC
Local time at epicenterSaturday, Jan 2, 2021 at 10:35 pm (GMT -7)
StatusConfirmed
Magnitude4.2
Depth5.1 km
Epicenter latitude / longitude42.5605°N / 111.454°W (Bear Lake, Idaho, United States)
Antipode42.561°S / 68.546°E
Shaking intensityLight shaking
Felt20 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoHell's Half Acre (132 km / 82 mi)
Nearby towns and cities11 km (7 mi) NW of Georgetown (pop: 467) | Show on map | Quakes nearby
16 km (10 mi) SE of Souda Springs (pop: 2,940) | Show on map | Quakes nearby
29 km (18 mi) NNW of Montpelier (pop: 2,510) | Show on map | Quakes nearby
46 km (29 mi) WSW of Afton (Wyoming) (pop: 1,970) | Show on map | Quakes nearby
62 km (39 mi) NNE of Preston (Franklin County) (pop: 5,210) | Show on map | Quakes nearby
88 km (55 mi) ESE of Pocatello (pop: 54,400) | Show on map | Quakes nearby
92 km (57 mi) ESE of Chubbuck (pop: 14,400) | Show on map | Quakes nearby
97 km (60 mi) NNE of Logan (Utah) (pop: 50,400) | Show on map | Quakes nearby
111 km (69 mi) SSE of Idaho Falls (pop: 59,200) | Show on map | Quakes nearby
403 km (250 mi) ESE of Boise (pop: 146,000) | Show on map | Quakes nearby
Weather at epicenter at time of quakeOvercast Clouds -6.8°C (20 F), humidity: 100%, wind: 2 m/s (3 kts) from S
Estimated seismic energy released1.3 x 1011 joules (35 megawatt hours, equivalent to 30.1 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
4.25.1 kmSouthern Idaho, USAUSGS
4.25 kmSOUTHERN IDAHO, USAEMSC

User reports for this quake (23)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Soda Springs, ID (16.7 km NW of epicenter) [Map] / Light shaking (MMI IV) / very short : Felt like house got hit hard by something really large. Short in duration but whole house shook, felt like a large jolt. No damage and nothing fell. | 2 users found this interesting.  
Soda Springs, Caribou, Idaho (11.2 km WNW of epicenter) [Map] / Light shaking (MMI IV) : Initially heard what sounded like a strong gust of wind immediately followed by the whole house shaking for about two seconds. No damage or items falling. | One user found this interesting.  
Niter, Idaho (22.9 km WSW of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / 1-2 s : We were in bed. Sounded like a small person walking across the floor, then like a cat jumped on the bed. | One user found this interesting.  
Pocatello / Very weak shaking (MMI II) / very short : Felt like someone was at the end of my bed shaking the mattress, 1 to 2 seconds. Upstairs bedroom. 10:35 would have been correct. I didn't look at a clock. I did listen for trains which can rattle the house, but there was no train noise. | One user found this interesting.  
Pocatello (92.3 km WNW of epicenter) [Map] / Very weak shaking (MMI II) / very short : The shaking I felt at 1035 pm on January 3rd was from pocatello | One user found this interesting.  
Pocatello, ID (87.9 km WNW of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s : 5th floor apartment, had horizontal shaking. It was quiet and I may not have noticed otherwise. | One user found this interesting.  
Pocatello, Idaho / Very weak shaking (MMI II) / very short : A very slight vibration just after 10:30pm on Jan 2. | One user found this interesting.  
Ammon, ID / Very weak shaking (MMI II) / 1-2 s : Very light shaking, barely a tremor. The person next to me didn't notice anything. | One user found this interesting.  
Idaho Falls / Weak shaking (MMI III) : Lasted ~3-4 seconds | One user found this interesting.  
Soda Springs, Caribou, Idaho (11 km WNW of epicenter) [Map] / Moderate shaking (MMI V)
near Montpelier, Bear Lake, Idaho (11.8 km SE of epicenter) [Map] / Light shaking (MMI IV) / 2-5 s
Montpelier / Very weak shaking (MMI II) / very short
Soda Springs / Moderate shaking (MMI V) / 5-10 s : Roaring sound and objects shaking  
Elk bend (329.3 km NW of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / very short (reported through our app)
Montpelier / Very weak shaking (MMI II) / very short
IDAHO FALLS (116.2 km NNW of epicenter) [Map] / not felt (reported through our app)
Soda springs / Light shaking (MMI IV) / 5-10 s
Preston, Idaho / Very weak shaking (MMI II) / single lateral shake / very short
SODA SPRINGS / Strong shaking (MMI VI)
Fruit Heights / not felt
83406 / not felt
Bern / Weak shaking (MMI III)
Georgetown Idaho / Light shaking (MMI IV)
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