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Light mag. 4.1 earthquake - North Atlantic Ocean, 98 km southwest of Setubal, District of Setubal, Portugal, on Saturday, Jan 7, 2023 at 5:41 pm (GMT -1) -

Light magnitude 4.1 earthquake at 28 km depth

7 Jan 18:45 UTC: First to report: IGN after 4 minutes.
7 Jan 19:11: Magnitude recalculated from 3.9 to 4.1. Hypocenter depth recalculated from 14.0 to 28.0 km (from 8.7 to 17.4 mi). Epicenter location corrected by 9.2 km (5.7 mi) towards WSW.

Earthquake details

Date & time	Jan 7, 2023 18:41:06 UTC -
Local time at epicenter	Saturday, Jan 7, 2023 at 5:41 pm (GMT -1)
Status	Confirmed
Magnitude	4.1
Depth	28.0 km
Epicenter latitude / longitude	37.9002°N / 9.6721°W (North Atlantic Ocean, Portugal)
Antipode	37.9°S / 170.328°E
Shaking intensity	Very weak shaking
Felt	3 reports
Primary data source	IGN (Instituto Geográfico Nacional)
Nearest volcano	###NEARESTVOLCANO2###
Nearby towns and cities	71 km (44 mi) W of Sines Municipality (pop: 12,800) \| Show on map \| Quakes nearby 78 km (49 mi) SW of Sesimbra (pop: 41,100) \| Show on map \| Quakes nearby 94 km (58 mi) SSW of São Domingos de Rana (pop: 46,700) \| Show on map \| Quakes nearby 94 km (58 mi) SSW of Corroios (pop: 52,500) \| Show on map \| Quakes nearby 95 km (59 mi) SSW of Amora (pop: 52,600) \| Show on map \| Quakes nearby 98 km (61 mi) SW of Setubal (pop: 117,100) \| Show on map \| Quakes nearby 102 km (64 mi) SSW of Lissabon (pop: 517,800) \| Show on map \| Quakes nearby 102 km (64 mi) SSW of Amadora (pop: 178,900) \| Show on map \| Quakes nearby 194 km (120 mi) WNW of Armona Island (pop: 1000) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Overcast Clouds 17.3°C (63 F), humidity: 88%, wind: 10 m/s (20 kts) from WSW
Estimated seismic energy released	8.9 x 10¹⁰ joules (24.8 megawatt hours, equivalent to 21.3 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.	Depth	Location	Source
4.1	28 km	Portugal: ATL	IGN
2.9	20 km	Portugal	RaspberryShake
3.8	24 km	Portugal: W Sines	IPMA
3.8	40 km	PORTUGAL	EMSC

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User reports for this quake (4)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.

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Lisboa (105 km NNE of epicenter) [Map] / Very weak shaking (MMI II) : At my bed, was quick and soft | 2 users found this interesting.

Alcáçovas / Very weak shaking (MMI II) / rattling, vibrating / very short : Some noise. But i live far away. | 2 users found this interesting.

Lissabon (102.2 km NNE of epicenter) [Map] / not felt

Lisbon / Very weak shaking (MMI II)

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