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Moderate mag. 3.9 earthquake - 26 km northeast of Setif, Algeria, on Wednesday, Jul 20, 2022 at 4:44 pm (GMT +1) -

Moderate mag. 3.9 earthquake - 26 km northeast of Setif, Algeria, on Wednesday, Jul 20, 2022 at 4:44 pm (GMT +1) Moderate mag. 3.9 earthquake - 26 km northeast of Setif, Algeria, on Wednesday, Jul 20, 2022 at 4:44 pm (GMT +1)

Moderate magnitude 3.9 earthquake at 1 km depth

20 Jul 15:47 UTC: First to report: VolcanoDiscovery after 3 minutes.
20 Jul 16:03: Now using data updates from EMSC

Earthquake details

Date & timeJul 20, 2022 15:44:54 UTC -
Local time at epicenterWednesday, Jul 20, 2022 at 4:44 pm (GMT +1)
StatusConfirmed
Magnitude3.9
Depth1.0 km
Epicenter latitude / longitude36.36°N / 5.62°E (Setif, Algeria)
Antipode36.36°S / 174.38°W
Shaking intensityWeak shaking
Felt18 reports
Primary data sourceEMSC (European-Mediterranean Seismological Centre)
Nearby towns and cities16 km (10 mi) SSE of BABOR - VILLE (Babor, Sétif) (pop: 33,000) | Show on map | Quakes nearby
24 km (15 mi) NNW of El Eulma (Sétif) (pop: 128,400) | Show on map | Quakes nearby
26 km (16 mi) NE of Setif (Sétif) (pop: 288,500) | Show on map | Quakes nearby
34 km (21 mi) NE of Aïn Arnat (Sétif) (pop: 35,100) | Show on map | Quakes nearby
39 km (24 mi) WSW of Rouached (Mila) (pop: 40,300) | Show on map | Quakes nearby
48 km (30 mi) E of Lafayette (Sétif) (pop: 38,600) | Show on map | Quakes nearby
89 km (55 mi) W of Constantine (pop: 450,100) | Show on map | Quakes nearby
230 km (143 mi) E of Algiers (Alger) (pop: 1,977,700) | Show on map | Quakes nearby
Weather at epicenter at time of quakeClear Sky 32.7°C (91 F), humidity: 18%, wind: 6 m/s (11 kts) from N
Estimated seismic energy released4.5 x 1010 joules (12.4 megawatt hours, equivalent to 10.7 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
3.91 kmNear Setif, Sétif, AlgeriaEMSC
3.91 kmNorthern AlgeriaRaspberryShake
3.91 kmAlgeria: NE SETIF.ARGIGN

Seismograms

Seismic station: Villasalto, Italy (VSL/MN network) | Distance from quake: 480 km / 298 mi | Show on map | Station Info
Seismic station Villasalto, Italy: 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 (21)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Sétif (30.1 km SW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 2-5 s
Jijel (53.2 km NNE of epicenter) [Map] / not felt (reported through our app)
El Eulma, Sétif (22.1 km SSE of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging
Sétif algerie (26.1 km SW of epicenter) [Map] / Light shaking (MMI IV) / single vertical bump / 2-5 s : pas trop forte  
Setif (25.7 km SW of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 5-10 s
Algeria setif (25.4 km SW of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 5-10 s : I was home when i felt the earthquake clearly  
setif (25 km SW of epicenter) [Map] / Very weak shaking (MMI II)
Setif (24.5 km SW of epicenter) [Map] / Weak shaking (MMI III) / 2-5 s
Sétif algeria (25.9 km SW of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s : Moyen 3.5 de magnitude approximativement  
Sétif (25.4 km SW of epicenter) [Map] / Weak shaking (MMI III) / single lateral shake / 5-10 s : It was so quick and so scary  
Sétif (25.5 km SW of epicenter) [Map] / Weak shaking (MMI III) / 1-2 s
Setif (27.1 km SW of epicenter) [Map] / Weak shaking (MMI III)
Setif (24.9 km SW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / very short : Very light movement while I was on my bed and the chandelier also moved  
setif / Weak shaking (MMI III)
Ouricia, Algerie / Weak shaking (MMI III) / rattling, vibrating / 2-5 s : Feeling vibrations under my feet  
Setif / not felt / horizontal (sideways) swinging / 1-2 s : Wow  
setif / Light shaking (MMI IV) / vertical swinging (up and down) / 2-5 s
Ferdjioua mila / Weak shaking (MMI III) / single lateral shake / 2-5 s
Jijel / Very weak shaking (MMI II) / single vertical bump / very short : Very weak shaking  
Setif aine mousse / Weak shaking (MMI III) / single lateral shake
Ain el kebira / not felt / horizontal (sideways) swinging / 5-10 s
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Earlier earthquakes in the same area

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