The 1856 Tsunami of Djidjelli (Eastern Algeria): Seismotectonics,
Modelling and Hazard Implications for the Algerian Coast
ABDELKARIM YELLES-CHAOUCHE,1
JEAN ROGER,2
JACQUES DE´VERCHE`RE,3,4
RABAH BRACE`NE,5
ANNE DOMZIG,6
HELENE HE´BERT,2
and ABDELAZIZ...
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The 1856 Tsunami of Djidjelli (Eastern Algeria): Seismotectonics,
Modelling and Hazard Implications for the Algerian Coast
ABDELKARIM YELLES-CHAOUCHE,1
JEAN ROGER,2
JACQUES DE´VERCHE`RE,3,4
RABAH BRACE`NE,5
ANNE DOMZIG,6
HELENE HE´BERT,2
and ABDELAZIZ KHERROUBI
1
Abstract—On August 21st and 22nd 1856, two strong earthquakes occurred off the seaport of Djidjelli, a
small city of 1000 inhabitants, located 300 km east of Algiers (capital of Algeria).
In relation to these two
earthquakes, an important tsunami (at least one) affected the western Mediterranean region and the eastern
Algerian coastline between Algiers and La Calle (Algero-Tunisian border).
Based on historical information as
well as on data recently collected during the Maradja 2 survey conducted in 2005 over the Algerian margin, we
show that the tsunami could have been generated by the simultaneous rupture of a set of three en echelon faults
evidenced off Djidjelli.
From synthetic models, we point out that the area affecte
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