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Moderate mag. 4.0 earthquake - Alboran Sea, 36 km northeast of Al Hoceima, Morocco, on Wednesday, Aug 3, 2022 at 10:19 pm (GMT +1) -

Moderate mag. 4.0 earthquake - Alboran Sea, 36 km northeast of Al Hoceima, Morocco, on Wednesday, Aug 3, 2022 at 10:19 pm (GMT +1) Moderate mag. 4.0 earthquake - Alboran Sea, 36 km northeast of Al Hoceima, Morocco, on Wednesday, Aug 3, 2022 at 10:19 pm (GMT +1)

Moderate magnitude 4.0 earthquake at 10 km depth

3 Aug 21:23 UTC: First to report: EMSC after 3 minutes.
3 Aug 21:26: Hypocenter depth recalculated from 11.0 to 30.0 km (from 6.8 to 18.6 mi). Epicenter location corrected by 17 km (10.4 mi) towards S.
3 Aug 21:27: Hypocenter depth recalculated from 30.0 to 5.0 km (from 18.6 to 3.1 mi). Epicenter location corrected by 14 km (8.6 mi) towards NNW.
3 Aug 21:47: Now using data updates from USGS

Earthquake details

Date & timeAug 3, 2022 21:19:57 UTC -
Local time at epicenterWednesday, Aug 3, 2022 at 10:19 pm (GMT +1)
Depth10.0 km
Epicenter latitude / longitude35.4576°N / 3.6375°W (Alboran Sea, Morocco)
Antipode35.458°S / 176.363°E
Shaking intensityWeak shaking
Felt7 reports
Primary data sourceUSGS (United States Geological Survey)
Nearby towns and cities36 km (22 mi) NE of Al Hoceima (pop: 395,600) | Show on map | Quakes nearby
38 km (24 mi) NE of Tirhanimîne (pop: 55,800) | Show on map | Quakes nearby
40 km (25 mi) NNE of Imzouren (pop: 40,000) | Show on map | Quakes nearby
43 km (27 mi) NNE of Bni Bouayach (Province de Al Hoceïma) (pop: 18,300) | Show on map | Quakes nearby
72 km (44 mi) WNW of Nador (pop: 129,300) | Show on map | Quakes nearby
173 km (107 mi) ESE of Gibraltar (Gibraltar) (pop: 26,500) | Show on map | Quakes nearby
202 km (125 mi) NE of Fes (pop: 964,900) | Show on map | Quakes nearby
333 km (207 mi) ENE of Rabat (pop: 1,655,800) | Show on map | Quakes nearby
Weather at epicenter at time of quakeClear Sky 26.1°C (79 F), humidity: 85%, wind: 1 m/s (2 kts) from N
Estimated seismic energy released6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 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.
4.010 km35 Km NE of Al Hoceïma, MoroccoUSGS
4.010 kmSpain: Strait of GibraltarRaspberryShake
3.82 kmMorocco: ALBORIGN
3.810 kmSpain: Strait of GibraltarGFZ
3.42 kmMorocco: NE Al Hoceima (MARR)IPMA


Seismic station: San Pablo, Spain (PAB/IU network) | Distance from quake: 459 km / 285 mi | Show on map | Station Info
Seismic station San Pablo, Spain: 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 (9)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Leave a comment if you find a particular report interesting or want to add to it.
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Send your own user report!
Boudinar (9.7 km S of epicenter) [Map] / not felt / horizontal (sideways) swinging / 2-5 s
Torrox costa Malaga spain (144.3 km NNW of epicenter) [Map] / Weak shaking (MMI III) / complex motion difficult to describe / 5-10 s : Sitting on 4th floor balcony  
Melilla / Weak shaking (MMI III) / 5-10 s
Melilla / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
Temsamen / not felt / complex rolling (tilting in multiple directions) / 1-2 s
alhoceima / Weak shaking (MMI III) / single lateral shake / 1-2 s
Lassara / Weak shaking (MMI III) / rattling, vibrating / 2-5 s : Weak shaking  
Driouch / Very weak shaking (MMI II) / 1-2 s
Nador / Very weak shaking (MMI II) / single vertical bump / 2-5 s : Quick shaking and short  

Earlier earthquakes in the same area

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