Algeria earthquakes

M6.8 earthquake 25 km WNW of Dellys, Algeria

A magnitude 6.8 earthquake struck 25 km WNW of Dellys, Algeria on Wed, May 21, 2003, 7:44 PM GMT+1 (18:44 UTC), 12 km (7 mi) below the surface.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 6.8 (mwc), strong
Local time: Wed, May 21, 2003, 7:44 PM GMT+1
UTC: 2003-05-21 18:44:20 UTC
Depth: 12.0 km (7.5 mi), shallow
Epicenter: 36.964° N, 3.634° E
Region: Algeria
Strongest shaking: IX, violent shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: IX, violent shaking
Peak ground acceleration: 123.0% of gravity
Peak ground velocity: 4.7 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

No one has reported feeling this quake to the USGS.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Reverse (thrust)
Moment magnitude: 6.8 Mww
Nodal plane 1: Strike 246°, dip 60°, rake 85°
Nodal plane 2: Strike 75°, dip 29°, rake 98°
Landslide alert: Orange
Liquefaction alert: Orange

How well it is located

Reviewed by a seismologist.

Depth from: OPERATOR_ASSIGNED
Station coverage gap: 19°
Stations used: 534

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 2.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp000bxpg (also filed as choy20030521184420, gcmtc052103h, gcmt20030521184420, duputel052103h, atlas20030521184420, iscgem6845775). Read Tue, Sep 22, 2026, 11:25 PM UTC.