HR: 16:35h
AN: T14C-03    [Abstracts]
TI: Coastal Uplift and Thrust Faulting Associated With the Mw=6.8 Zemmouri (Algeria) Earthquake of 21 May, 2003
AU: Meghraoui, M
EM: mustapha@eost.u-strasbg.fr
AF: IPGS-EOST, rue René Descartes, Strasbourg, 67084 France
AU: Maouche, S
EM: said_maouche@hotmail.com
AF: CRAAG, BP 63, Bouzareah, Algiers, 16340 Algeria
AU: Chemaa, B
EM: chemaa_b@yahoo.fr
AF: INCT, Rue de Tripoli Hussein Dey, Algiers, 16040 Algeria
AU: * Cakir, Z
EM: ziyadin.cakir@eost.u-strasbg.fr
AF: IPGS-EOST, rue René Descartes, Strasbourg, 67084 France
AU: Aoudia, K
EM: aoudia@dst.univ.trieste
AF: ICTP, Strada Costiera 11, Trieste, 34014 Italy
AU: Harbi, A
EM: assia_harbi@wissal.dz
AF: CRAAG, BP 63, Bouzareah, Algiers, 16340 Algeria
AU: Alasset, P
EM: pierrejean.alasset@eost.u-strasbg.fr
AF: IPGS-EOST, rue René Descartes, Strasbourg, 67084 France
AU: Ayadi, A
AF: CRAAG, BP 63, Bouzareah, Algiers, 16340 Algeria
AU: Bouhadad, Y
EM: youcef _bouhadad@hotmail.com
AF: CGP, Rue Kaddour RAHIM BP 252 Hussein Dey, Algiers, 16040 Algeria
AU: Benhamouda, F
EM: benhamoudaf@wissal.dz
AF: INCT, Rue de Tripoli Hussein Dey, Algiers, 16040 Algeria
AB: A shoreline uplift marked by a continuous white band visible at rocky headlands occurred during the 21 May 2003 earthquake (Mw 6.8) in northern Algeria. We measured the amount of coastal uplift on a white band (emerged algae) and harbors quays between Boumerdes and Dellys. Most of measured points were collected using tape and differential GPS on rocky headlands with Ÿa ,b 0.15 m error bar (tidal prism). Leveling lines running parallel and orthogonal to the coast also provide the precise amount of uplift in the epicentral area. The uplift distribution shows an average 0.55 m along the shoreline with a maximum 0.75 m east of Boumerdes and a minimum close to 0 near Cap Djinet. The active deformation related to a thrust fault is modeled along the ŸŒ 55 km coastline. The dislocation model predicts surface slip on a N 54›XE trending reverse fault, dipping 50›X SE in agreement with CMT solution and coastal uplift. The faulting characteristics imply a fault geometry with possible sea bottom ruptures between 5 to 10 km offshore.
DE: 7230 Seismicity and seismotectonics
SC: Tectonophysics [T]
MN: 2004 AGU Fall Meeting