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Moderate mag. 4.3 earthquake - North Atlantic Ocean, 296 km southeast of Lissabon, Lisboa, Portugal, on Saturday, Jan 1, 2022 at 8:03 pm (GMT -1) -

Moderate mag. 4.3 earthquake - North Atlantic Ocean, 296 km southeast of Lissabon, Lisboa, Portugal, on Saturday, Jan 1, 2022 at 8:03 pm (GMT -1) Moderate mag. 4.3 earthquake - North Atlantic Ocean, 296 km southeast of Lissabon, Lisboa, Portugal, on Saturday, Jan 1, 2022 at 8:03 pm (GMT -1)

Moderate magnitude 4.3 earthquake at 7 km depth

1 Jan 21:06 UTC: First to report: IGN after 2 minutes.
1 Jan 21:11: Magnitude recalculated from 4.6 to 4.1. Hypocenter depth recalculated from 59.0 to 14.0 km (from 37 to 8.7 mi). Epicenter location corrected by 3.3 km (2 mi) towards SE.
1 Jan 21:29: Magnitude recalculated from 4.1 to 4.4. Hypocenter depth recalculated from 14.0 to 13.0 km (from 8.7 to 8.1 mi). Epicenter location corrected by 4.4 km (2.8 mi) towards ESE.
1 Jan 23:04: Now using data updates from USGS

Earthquake details

Date & timeJan 1, 2022 21:03:48 UTC -
Local time at epicenterSaturday, Jan 1, 2022 at 8:03 pm (GMT -1)
StatusConfirmed
Magnitude4.3
Depth7.0 km
Epicenter latitude / longitude36.3208°N / 7.672°W (North Atlantic Ocean, Portugal)
Antipode36.321°S / 172.328°E
Shaking intensityLight shaking
Felt627 reports
Primary data sourceUSGS (United States Geological Survey)
Nearby towns and cities296 km (184 mi) SSE of Lissabon (pop: 517,800) | Show on map | Quakes nearby
79 km (49 mi) S of Armona Island (pop: 1000) | Show on map | Quakes nearby
Estimated seismic energy released1.8 x 1011 joules (49.4 megawatt hours, equivalent to 42.5 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
4.37 km79 Km S of Olhão, PortugalUSGS
4.410 kmPortugal: STRAIT OF GIBRALTAREMSC
4.210 kmPortugal: Strait of GibraltarGFZ
4.37 kmPortugal: Strait of GibraltarRaspberryShake
4.413 kmPortugal: GOLFO DE CÁDIZIGN
4.410 kmPortugal: Oihao / Meerenge Von GibraltarZAMG

Seismograms

Seismic station: Vaqueiros, Portugal (PVAQ/PM network) | Distance from quake: 120 km / 75 mi | Show on map | Station Info
Seismic station Vaqueiros, Portugal: 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. Bandpass filter applied: 0.2-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (697)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Portimao / Weak shaking (MMI III) / horizontal (sideways) swinging / 1-2 s : 2 shakes | 9 users found this interesting.  
Óbidos, Lisboa, Portugal / not felt : Nothing was felt here in this region | 8 users found this interesting.  
Caldas da Rainha, Lisbon, Portugal / not felt : I didn't feel anything but there were those who felt some vibrations | 8 users found this interesting.  
Vila Real de Santo António / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s : A cama tremeu | 8 users found this interesting.  
Ayamonte (101.9 km NNE of epicenter) [Map] / Very weak shaking (MMI II) / 1-2 s : Estaba jugando al ordenador y la pantalla tembló un poco y yo no estaba ni tocando la mesa. | 7 users found this interesting.  
Ayamonte (101.4 km NNE of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 5-10 s : Estaba en el sofá y sentí temblor y el pero estaba ladrando | 7 users found this interesting.  
Isla Cristina (102.3 km NNE of epicenter) [Map] / Very weak shaking (MMI II) / vibration and rolling / 1-2 s : Sentada en butacón relax se movió, este se agitó y sentí como algo golpeaba contra la pared unas 4 ó 5 veces. | 4 users found this interesting.  
Bellavista, aljaraque (122.3 km NNE of epicenter) [Map] / Very weak shaking (MMI II) / 1-2 s : Se movió el sofá de mi casa, la vitrina y las mamparas del baño. Por Twitter me dicen que en Isla Cristina se cayeron cuadros y lamparas moviendose fuertemente | 4 users found this interesting.  
Islantilla (106.5 km NNE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 5-10 s : Las sillas y muebles hicieron ruido y vibraron. Estaba tranquila en casa | 5 users found this interesting.  
Machados, Portugal (92.6 km NNW of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating : Felt by all, dressing table & clothing rack visibly shook with objects rattling, dog woke up alarmed & barking. Hung artwork displaced. Was our first earthquake & knew instantly what we were experiencing without a doubt. Will assess our home when daylight | 2 users found this interesting.  
Ayamonte (101.1 km NNE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : Estaba sentada en la silla del pc, y de repente sentí que la silla vibraba, pensé que era mi hijo haciéndome una broma, pero al girarme vi que no había nadie, y en ese momento salió mi hijo diciendo si lo había sentido, que su cama había vibrado. | 2 users found this interesting.  
Moncarapacho (95.4 km N of epicenter) [Map] / Light shaking (MMI IV) / single vertical bump / 1-2 s : Light shaking | 3 users found this interesting.  
Tavira algarve (89.5 km N of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 5-10 s : Sitting watching tv Chair shook for more than 5seconds Outside dogs barked. | 3 users found this interesting.  
Albufeira (103.1 km NNW of epicenter) [Map] / Moderate shaking (MMI V) / single vertical bump / very short : Watching tv and felt the house shake up and down..just once. Thought it was a big truck went by but went to window and no traffic | One user found this interesting.  
Armacao de pera (105.9 km NW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating : Hello, I was still when I felt a sensation of movement in my body and that simultaneously, something to vibrate / bang between a piece of furniture and the neighbor's ceiling. I wondered if it was a noise from the neighbor but no: the shaking was really g | One user found this interesting.  
Boliqueime, Loule (100.1 km NNW of epicenter) [Map] / Light shaking (MMI IV) : I was asleep and woken up by the sound of what I thought was a truck driving past. My husband came into the room and asked if I had felt the earthquake. | One user found this interesting.  
Albufeira (97.1 km NNW of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s : Nicht viel. Ein leichtes Grummeln wie bei einem Gewitter und die Matzratze unter mir im Bett fing etwas an zu arbeiten... | One user found this interesting.  
Quarteira 8125-020 (91 km NNW of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / 1-2 s : Heard brief sound in hallway/kitchen. Felt short trembling immediately afterwards while in sitting room.  
Olhão (80.1 km N of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 15-20 s : We live on the 4th floor near the Olhão harbor. Having grown up in Southern California, I'm very familiar with quakes. I figured it was around a 4.0. The building was definitely shaking for about 20 seconds, but the chandelier didn't move.  
Vila Real de Santo Antonio, Faro (100.2 km NNE of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s : Light shaking but nothing major. Two bursts. One for a few seconds ans then another. I live in Vila Real de Santo António.  
Moncarapacho, Olhão Municipality, Faro (90 km N of epicenter) [Map] / Light shaking (MMI IV) / very short : Was sitting on sofa when the sofá shook quite strongly for a very short time. The TV table also shook  
Quelfes (82.5 km N of epicenter) [Map] / Very weak shaking (MMI II) / single vertical bump / very short : Felt like the House was dropped on to the ground like a strong thump I even felt it in my neck as I was sitting in a chair !was more of a surprise to me all the dogs started barking in the neighborhood.  
Albufeira,Portugal (103.2 km NNW of epicenter) [Map] / Very weak shaking (MMI II) / single vertical bump / 1-2 s : We were in our living room,watching tv.The glasses were singing and the water in our glasses were moving,like i know it from Japan.  
Albufeira, Algarve, Portugal (99.8 km NNW of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 10-15 s : I was sleeping and woke up with the apartment shaking horizontally, my fiancé was awake and fell the same  
Albufeira, Faro (99.7 km NNW of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 30-60 s : Furniture shaking, sea was rough and very loud leading up to the quake. Has gone quieter now. Quite a bizarre feeling.  
Messines, Silves, Faro (117.3 km NNW of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 1-2 s : zweimal in kurzen Abständen wackelte das Reisemobil, auch bei anderen Reisemobilen. Vibrationen ähnlich dem Vorbeifahren von leichten Lastkraftwagen  
  • The motorhome wobbled twice at short intervals, also with other motorhomes. Vibrations similar to light trucks driving past
portimao, portugal (119.4 km NW of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 20-30 s : I was lying in bed, felt the bed move horizontally about 4-5 times, shaking. I started looking online to see if there was an earthquake in the ocean nearby. Then my wife who sleeps in the other bedroom came over saying "did you feel that?...WTF?" she felt  
Boliqueime, Loulé, Faro (97.3 km NNW of epicenter) [Map] / Light shaking (MMI IV) / 20-30 s : deutliches Schütteln, während ich im Sessel saß. Wasser im Glas bewegte sich, Fensterrahmen knarzten  
Marinha grande, Leiria, Portugal / not felt : I didn't felt the quake but thanks to a live on twitch I could watch my pendulum and see VERY VERY small vibrations. To which I have videos | 7 users found this interesting. (reported through our app)  
ALFANZINA, LAGOA, PORTUGAL (108.9 km NW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 30-60 s : DOGS ALERTED AND BARKING. TABLE VISIBLY SHOOK | One user found this interesting.  
Quelfes - Olhão (82.8 km N of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s : Felt the shake, it was unexpected, took me some seconds to realize it was an earthquake. | One user found this interesting.  
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