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Mag. 4.9 earthquake - 12 km north of Mila, Wilaya de Mila, Algeria, on Friday, Aug 7, 2020, at 07:15 am (Algiers time)

A strong magnitude 4.9 earthquake hit 4.4 km (2.7 mi) away from Sidi Mérouane, Mila,  Algeria, in the morning of Friday, Aug 7, 2020 at 7.15 am local time (Africa/Algiers GMT +1). The quake had a very shallow depth of 10 km (6 mi) and was felt widely in the area. The shallow depth of the quake caused it to be felt more strongly near the epicenter than a deeper quake of similar magnitude would.

Mag. 4.9 earthquake - 12 km north of Mila, Wilaya de Mila, Algeria, on Friday, Aug 7, 2020, at 07:15 am (Algiers time) Mag. 4.9 earthquake - 12 km north of Mila, Wilaya de Mila, Algeria, on Friday, Aug 7, 2020, at 07:15 am (Algiers time)

Moderate magnitude 4.9 earthquake at 10 km depth

7 Aug 06:19 UTC: First to report: EMSC after 3 minutes.
Aug 7 06:21: Magnitude recalculated from 5.4 to 5.3.
Hypocenter depth recalculated from 10.0 to 100.0 km.
Aug 7 06:26: Magnitude recalculated from 5.3 to 4.9.
Hypocenter depth recalculated from 100.0 to 10.0 km.
Update Fri, 7 Aug 2020, 11:48
A second, similar quake of magnitude 4.7 just occurred in the same area 30 minutes ago. Many people have been reporting it felt as light to moderate shaking.
Update Fri, 7 Aug 2020, 08:48

Light magnitude 4.9 quake felt in northern Algeria this morning

User experience reports and epicenter (red circle) of this mornings quake in Algeria
User experience reports and epicenter (red circle) of this mornings quake in Algeria
A moderate magnitude 4.9 quake occurred in northern Algeria this morning at 06:15 UTC. The quake being relatively shallow (approx. 10 km depth) woke up many residents of nearby villages and towns.
The epicenter was 3 km NNE of Sidi Mérouane and approx. 50 km NW of the historic town and regional capital Constantine, the nearest larger city at approx. 463,000 inhabitants.
Many people within approx. 70 km radius reported light shaking, some in the areas closest to the epicenter, especially in Sidi Mérouane (pop: approx. 20,000) felt moderate or even strong shaking.
There are no reports of damage or injuries.
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Earthquake details

Date & timeAug 7, 2020 06:15:38 UTC
Local time at epicenterFriday, Aug 7, 2020, at 07:15 am (Africa/Algiers GMT +1)
StatusPreliminary (automatic detection)
Depth10.0 km
Epicenter latitude / longitude36.56°N / 6.26°E Mila, Algeria
Seismic antipode36.56°S / 173.74°W
Shaking intensityModerate shaking near epicenter
Felt80 reports
Primary data sourceEMSC (European-Mediterranean Seismological Centre)
Estimated seismic energy released1.4 x 1012 joules (392 megawatt hours, equivalent to 338 tons of TNT) | about seismic energy
Interactive map
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Nearby places

The closest larger town where the quake might have been felt is Chateaudun, a town with 72,000 inhabitants in Algeria, in 45 km (28 mi) distance south of the epicenter. People likely experienced light shaking there. Several smaller towns and villages are located closer to the epicenter and might have experienced stronger shaking. In the capital of  Algeria, Algiers, 284 km (176 mi) away from the epicenter, the earthquake was probably felt as very weak shaking.
The following table shows some of the places that might have been affected (or not) by the shaking.
Distance Place Max. shaking intensity(*) Region Country
4 km (3 mi)
S of epicenter
Sidi Mérouane
(pop: 25,100)
V: Moderate
12 km (8 mi)
S of epicenter
(pop: 68,800)
V: Moderate
23 km (14 mi)
SW of epicenter
(pop: 40,300)
IV: Light
34 km (21 mi)
SE of epicenter
Hamma Bouziane
(pop: 63,000)
IV: Light
36 km (22 mi)
E of epicenter
Didouche Mourad
(pop: 25,800)
IV: Light
39 km (24 mi)
SE of epicenter
Aïn Smara
(pop: 29,000)
IV: Light
45 km (28 mi)
S of epicenter
(pop: 71,700)
IV: Light
50 km (31 mi)
S of epicenter
(pop: 51,700)
IV: Light
211 km (131 mi)
SE of epicenter
(pop: 634,300)
II: Very weak
284 km (176 mi)
W of epicenter
(pop: 1,977,700)
II: Very weak
(*) Shaking intensity according to the Modified Mercalli Intensity Scale (MMI) and estimated using seismic models.

User-reports for this quake (210)

We received 80 reports for this quake.
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.
Flag as inappropriate.
Mark as helpful or interesting.
Send your own user report!
Aïn smara, haraisha amar / Light shaking (MMI IV) : I was in the toilette and suddenly it starts shaking I was thinking that it's gonna stop but it gets stronger so I was obliged to live I was so scared  
Nouvelle ville / Moderate shaking (MMI V) : I was watching youtube until I felt a sudden vibration that lasted few seconds, I heard cracks and some sounds, the window and the door started to swing as well as the light bulb.  
Beni Hamidene Constantine / Very strong shaking (MMI VII) : i was sleeping, the bed started shaking,, it was strong and scary,,, اللهم الطف بينا يا رب  
batna / Light shaking (MMI IV) : I was sleeping then I felt everything shaking, i looked at the ceiling to figure it out and the chandelier was moving  
mila, Algeria / Very strong shaking (MMI VII)
Mila / Strong shaking (MMI VI) : لا اله الا الله  
Ali mendjeli / Moderate shaking (MMI V)
AHMED RACHEDI / Weak shaking (MMI III) : rabi yassterna  
AHMED RACHEDI / Weak shaking (MMI III) : rabi yasstar el moumnine wa ya 3awad 3liham.  
Ain Smara, constantine / Moderate shaking (MMI V)
costantine / Light shaking (MMI IV)
Collo / Light shaking (MMI IV)
mila, Algeria / Very strong shaking (MMI VII)
taher , jijel / Moderate shaking (MMI V)
Es sebt skikda / Moderate shaking (MMI V) : We felt it  
Sidi merouane / Very strong shaking (MMI VII) : قاوية بزاف  
Hamma bouziane constantine / Light shaking (MMI IV) : هزة قوية نوعا ما مع تحرك المباني  
Constantine / Light shaking (MMI IV)
Bekira Constantine / Moderate shaking (MMI V) : نوضتنا من الرقاد  
Mila / Strong shaking (MMI VI)
Hamma Bouzinane / Light shaking (MMI IV)
Grarem w de mila / Strong shaking (MMI VI)
Grarem w de mila / Strong shaking (MMI VI) : Fissures vitres cassées  
Jijel taher / Strong shaking (MMI VI)
constantine algeria / Light shaking (MMI IV)
El ancer,jijel / Strong shaking (MMI VI)
Sodi Merouane / Strong shaking (MMI VI)
taher / Very weak shaking (MMI II)
El khroub constantine / Strong shaking (MMI VI)
Constantine ain smara / Light shaking (MMI IV)
mila / Severe shaking (MMI VIII) : Movement from south to north back and forth  
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What is Intensity and the Mercalli Intensity Scale?

The amount of shaking that occurs on the surface due to an earthquake is called the intensity. It is commonly measured on the so-called Modified Mercalli Intensity Scale (MMI) ranging from 1 (not felt) to 10 (extreme shaking), and given in Roman numerals as I,II,...IX, X, and often displayed with color codes ranging from light blue to dark red.
Earthquake intensity depends mainly on the magnitude and depth of the quake as well as the distance from the epicenter: The further away, the less shaking intensity occurs.
Read more about the MMI scale!

Compare Quake Data

Data for the same earthquake as reported by different agencies

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 Time GMT
Epicenter Agency
4.9 10 km
6.2 mi
06:15:38 Northern Algeria EMSC (European-Mediterranean Seismological Centre)
4.7 10 km
6.2 mi
06:15:39 Northern Algeria
15 km (9.3 mi) epicenter difference with EMSC
GFZ (German Research Centre for Geosciences)
4.9 10 km
6.2 mi
06:15:37 3 km NNE of Sidi Mérouane, Algeria
1.5 km (0.9 mi) epicenter difference with EMSC
USGS (United States Geological Survey)
(*) A depth given as 10 km often means that the the depth of the quake could not determined with sufficient accuracy.


Seismic station: ROA/UCM/GEOFON Station Mahon, Menorca (MAHO/WM network) | Distance from quake: 410 km / 255 mi | Show on map | Station Info
Seismic station ROA/UCM/GEOFON Station Mahon, Menorca: 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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Aftershocks for this quake

So far, only one aftershock has been recorded. It hit 3 days after the mainshock in 2.9 km (1.8 mi) distance. When more aftershocks are detected, we will update this section.

What are aftershocks?

Larger earthquakes (above magnitude 5 or so) such as this one are usually followed by smaller ones known as aftershocks that occur in the same area during the days, weeks, months or even years after the main shock.
[More info]

What about this quake?

Based on its magnitude, the fault that was active during the quake likely ruptured beneath a surface of approx. 8 km2 (=3 sqare miles) as a first-order estimate. The length of the rupture zone thus was probably around 5 km (3 mi).
[More info]

Recorded aftershocks, latest first (1 quake)

Date and Time GMTMag
Aug 10, 2020 02:50 pm (Algiers)
4 years ago
3 days after main shock

10 km
2.9 km (1.8 mi)
E of main shock
11 km N of Mila, Mila, AlgeriaMore
Aug 7, 2020 07:15 am (Algiers)
4 years ago - felt

10 km
0 km - This quake4.4 km N of Sidi Mérouane, Mila, Algeria
Main Shock (this quake)

Map of aftershocks

Earthquake statistics

Average number of earthquakes

Based on data from the past 10 years and our earthquake archive back to 1900, there are about 185 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):
  • Mag. 5 or higher: 0.49 quakes per year (or 1 quake every 2 years)
  • Mag. 4 or higher: 5.2 quakes per year
  • Mag. 3 or higher: 11.7 quakes per year
  • Mag. 2 or higher: 12 quakes per year
The area where this quake occurred has a high level of seismic activity. It has had at least 5 quakes above magnitude 5 since 2014, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 1 to 5 years.

Number of quakes per year

Previous quakes in the same area of this earthquake

Map of earlier quakes in the area of this quake

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Map to embed or share

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