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Reassessing the rupture process of the 2003 Boumerdes-Zemmouri earthquake (Mw 6.8, northern Algeria) using teleseismic, strong motion, InSAR, GPS, and coastal uplift data

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Abstract

In this work, we determined the coseismic slip distribution of the Boumerdes-Zemmouri earthquake (Mw 6.8, 2003) by inverting a most comprehensive set of data, teleseismic seismograms, strong motion seismograms, coastaluplift, Global Positioning System (GPS), and Interferometric Synthetic Aperture Radar. We suggest a best-fitting model of coseismic slip distribution on the following two segments: the first segment oriented at N70° and the second segment located at the west of the first one and oriented at N100°.The slip distribution shows two slip patches on the N70° segment containing the hypocenter. The eastern patch is shallower, located between 0 and 9 km depth, with a maximum slip of 2.30 m. The western slip-patch on this same segment is deeper, between 4 and 12 km depth, with a slip that reaches a maximum value of 2.70 m at the center. The N100° segment also displays two slip patches, a small one in the east of the segment, which is between 4 and 8 km depth and a larger one in the western part of the segment, between 0 and 10 km depth. Both patches associated with the N100° segment show a maximum slip between 1.10 and 1.40 m.

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Acknowledgements

We would like to express our special thanks to Nasser Laouami (CGS) and Mustapha Méghraoui (EOST) for providing us with strong motion and uplifts data.

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Authors and Affiliations

  1. Centre de Recherche en Astronomie Astrophysique et Géophysique (CRAAG), BP 63 Route de l’Observatoire Bouzaréah, Alger, Algérie

    Hamoud Beldjoudi

  2. Geoazur, Université de Nice, 250 Rue Albert Einstein, 06560, Valbonne, France

    Bertrand Delouis

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  1. Hamoud Beldjoudi
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  2. Bertrand Delouis
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Correspondence to Hamoud Beldjoudi.

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This work is dedicated to the memory of our late Assia Harbi.

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Beldjoudi, H., Delouis, B. Reassessing the rupture process of the 2003 Boumerdes-Zemmouri earthquake (Mw 6.8, northern Algeria) using teleseismic, strong motion, InSAR, GPS, and coastal uplift data. Med. Geosc. Rev. 4, 471–494 (2022). https://doi.org/10.1007/s42990-022-00090-z

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