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Terremoto leve mag. 3.1 - 40 miles NW of Montgomery, Alabama, USA, miércoles, 22 dic 2021 00:20 (GMT -6) -

Terremoto leve mag. 3.1 - 40 miles NW of Montgomery, Alabama, USA, miércoles, 22 dic 2021 00:20 (GMT -6) Terremoto leve mag. 3.1 - 40 miles NW of Montgomery, Alabama, USA, miércoles, 22 dic 2021 00:20 (GMT -6)

Terremoto leve magnitud 3.1 a 0 km de profundidad

22 Dec 06:24 UTC: Primero en informar: VolcanoDiscovery después de 4 minutos.
22 Dec 06:36: Ahora usando una nueva fuente de datos: USGS
22 Dec 07:00: Magnitud recalculada de 3.3 a 3.1. Profundidad recalculada de 5.0 a 8.8 km (de 3.1 a 5.5 mi). Ubicación del epicentro corregida 9.3 km (5.8 mi) al WSW.
22 Dec 14:52: Profundidad recalculada de 8.8 a 0.0 km (de 5.5 a 0 mi). Ubicación del epicentro corregida 6 km (3.7 mi) al NNE.
Update Wed, 22 Dec 2021, 06:42

Magnitude 3.3 earthquake strikes near Montgomery, Montgomery County, Alabama, USA

3.3 quake 22 Dec 12:20 am (GMT -6)
3.3 quake 22 Dec 12:20 am (GMT -6)
The United States Geological Survey reported a magnitude 3.3 quake in the United States near Montgomery, Montgomery County, Alabama, only 21 minutes ago. The earthquake hit after midnight on Wednesday, December 22nd, 2021, at 12:20 am local time at a very shallow depth of 3.1 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.
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 Clanton (pop. 8,800) located 6 miles from the epicenter.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Bristol (pop. 2,600) located 14 miles from the epicenter, Calera (pop. 13,200) 23 miles away, and Prattville (pop. 35,400) 25 miles away. In Millbrook (pop. 15,300, 28 miles away), Selma (pop. 19,500, 31 miles away), Alabaster (pop. 32,700, 34 miles away), Montgomery (pop. 200,600, 36 miles away), Shelby Courthouse (pop. 22,900, 36 miles away), and Hoover (pop. 84,800, 45 miles away), the quake was probably not felt.

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Detalles del terremoto

Fecha y hora22 Dec 2021 06:20:48 UTC -
Hora local en el epicentromiércoles, 22 dic 2021 00:20 (GMT -6)
StatusConfirmado
Magnitud3.1
Prof.0.0 km
Epicentro latitud / longitud32.78433°N / 86.7655°W (Condado de Chilton, Alabama, Estados Unidos)
Antipode32.784°S / 93.235°E
Intensidad del temblorTemblor débil
Sentido41 informes
Fuente primaria de datosUSGS (United States Geological Survey)
Lugares cercanos10 km al E de Maplesville (pop: 704) | En el mapa | Sismos cercanos
14 km al OSO de Clanton (pop: 8,840) | En el mapa | Sismos cercanos
20 km al S de Bristol (pop: 2,620) | En el mapa | Sismos cercanos
35 km al S de Calera (pop: 13,200) | En el mapa | Sismos cercanos
46 km al NO de Prattville (pop: 35,400) | En el mapa | Sismos cercanos
48 km al NNE de Selma (pop: 19,500) | En el mapa | Sismos cercanos
51 km al S de Alabaster (pop: 32,700) | En el mapa | Sismos cercanos
64 km al NO de Montgomery (pop: 200,600) | En el mapa | Sismos cercanos
69 km al S de Hoover (pop: 84,800) | En el mapa | Sismos cercanos
89 km al ESE de Tuscaloosa (pop: 98,300) | En el mapa | Sismos cercanos
Tiempo en el epicentro en el momento del sismoClear Sky 4°C (39 F), humidity: 95%, wind: 2 m/s (5 kts) from NW
Energía sísmica estimada liberada2.8 x 109 joules (783 kWh, equivalente a 0.674 toneladas de 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.
RevistaProf.UbicaciónFuente
3.10 km10 Km SW of Clanton, AlabamaUSGS
3.19 kmALABAMAEMSC
3.10 kmAlabamaRaspberryShake

Seismograms

Seismic station: Lakeview Retreat, Alabama, USA (LRAL/US network) | Distance from quake: 36 km / 22 mi | Show on map | Station Info
Seismic station Lakeview Retreat, Alabama, 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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Maplesville (10.9 km WSW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 5-10 s : Wide awake working on my website,sitting on my bed, (Shed to house conversion on the main floor). House shook and rattled the windows. I thought it was thunder at first, or maybe a BIG 18 wheeler was going by, but I live on a dead end dirt road with 2 hou | 2 users found this interesting.  
Maplesville, Alabama / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : We heard a very loud rumble & my house shook. Audibly heard my windows rattle. Wasn't for very long but was long enough to startle us to go look outside thinking something close blew up or something. | 2 users found this interesting.  
Plantersville (18.5 km SW of epicenter) [Map] / Weak shaking (MMI III) : Laying on couch with all sounds and power off and heard and dust and dull noise with a small vibrating feeling | One user found this interesting.  
Maplesville, AL / Light shaking (MMI IV) / complex motion difficult to describe / 10-15 s : A huge movement | 3 users found this interesting.  
Clanton (16.5 km NE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : I was asleep in bed and felt my bed shaking and it felt like a long thunder | 2 users found this interesting.  
Jones AL (29.8 km SSW of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / very short : Just layed down in bed felt the bed move side to side East to West motion | 2 users found this interesting.  
Deatsville Al. 36022 / not felt : All the dogs in the neighborhood were barking like crazy at that time. I was outside with mine. A friend in Clanton texted me about the quake, I realized that was the time I had been outside. She did not feel it, but said it was on FB. | One user found this interesting.  
Clanton / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : I was sitting in my garage when all of a sudden the doors started moving and I heard what sounded like a huge thunder for about 5-10 sec. It was very very scary! | One user found this interesting.  
Florence al / Light shaking (MMI IV) : I was in bed, trying to wind down to go to sleep. Felt my bed moving at about 12:30 am. I have high blood pressure so I first thought maybe my pressure was up. But I felt certain it was really my bed moving. So I flip over, turn the light on and ck for a | One user found this interesting.  
Maplesville Alabama / Light shaking (MMI IV) / vibration and rolling / 2-5 s : You could hear and feel something moving through the ground like a bomb had been dropped far enough away not to cause damage to where we are but the sudden rush of vibration and rolling as a roaring sound came through quickly. We had no clue what it was b | One user found this interesting.  
Deatsville Al. 36022 / not felt : All the dogs in the neighborhood were barking like crazy at that time. I was outside with mine. A friend in Clanton texted me about the quake, I realized that was the time I had been outside. She did not feel it, but said it was on FB. | One user found this interesting.  
Lawley (19 km WNW of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s : Felt like I was dizzy and swinging sideways. Sitting on the sofa. It felt like two short shakes or either there was a lull in the shake. 2-7 seconds and a rumble. Made me feel odd.  
Thorsby, Alabama (16.4 km NNE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : I was on Facebook. I thought maybe we were having a strong storm that was shaking the house. My children came up from downstairs and were asking if I felt it. Thought then that maybe there had been a train wreck because I have felt that too but apparently  
Maplesville, Al / Light shaking (MMI IV) / rattling, vibrating / 20-30 s : Loud rumbling sound with shaking | 2 users found this interesting.  
Clanton Alabama (610.7 km S of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake / very short : Lightshaking and loud | One user found this interesting.  
Clanton (16.5 km NE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : I was asleep in bed and felt my bed shaking and it felt like a long thunder | One user found this interesting.  
Chilton County Alabama (15.3 km NNE of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 2-5 s : In bed sleeping g it woke me | One user found this interesting.  
Billingsley Alabama / Weak shaking (MMI III) / horizontal (sideways) swinging / 1-2 s : Very quick, shook my whole house. I was sitting on the couch watching a show and all of a sudden everything started to shake like a semi truck passing by on the interstate or something.  
Thorsby, al / not felt : I heard it rumbling and windows shook but I didn’t feel it but heard it. Woke me up | One user found this interesting.  
Maplesville, AL / Light shaking (MMI IV) / rattling, vibrating / 5-10 s : Sounded like a rolling Thunder, dishes in the cabinets rattled, house shook. | One user found this interesting.  
Helena, AL / Very weak shaking (MMI II) / very short : It woke me up but not my partner. | One user found this interesting.  
At home in bed (16.5 km NE of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / 1-2 s : Rumble and quick shake  
Wetumpka, Elmore, Alabama (52.7 km ESE of epicenter) [Map] / Very weak shaking (MMI II) / very short
Clanton, Alabama (15.2 km ENE of epicenter) [Map] / not felt
Wetumpka, AL (58.4 km ESE of epicenter) [Map] / not felt
Jemison Alabama (18.6 km N of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 15-20 s
35045 (16.6 km NNE of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 5-10 s : Very unused boom and rolling Very load long lasting like thunder that never quit  
Billingsley. AL (10.5 km SSE of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 30-60 s : Woke up from sleep  
Clanton (15.7 km NE of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 2-5 s : Was awakened by ground shaking, house shaking.  
Clanton, AL (27.4 km SE of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 5-10 s
near Bristol, Chilton, Alabama (10.3 km W of epicenter) [Map] / Weak shaking (MMI III) / very short
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