RT Journal Article T1 Characterization of the shallow subsurface structure across the Carrascoy Fault System (SE Iberian Peninsula) using P-wave tomography and Multichannel Analysis of Surface Waves A1 Handoyo, H. A1 DeFelipe, Irene A1 Martín Banda, Raquel A1 García Mayordomo, Julián A1 Martí Linares, David A1 Martínez Díaz, José Jesús A1 Insua Arévalo, Juan Miguel A1 Teixidó, T. A1 Palomeras, Inmaculada A1 Alcalde, J. A1 Carbonell, R. AB The seismicity in the SE Iberian Peninsula is distributed parallel to the coast in a well-developed strike-slip fracture system known as the Eastern Betic Shear Zone (EBSZ). This work focuses on the characterization of the shallow subsurface structure of the Algezares-Casas Nuevas Fault, within the Carrascoy Fault System of the EBSZ. The Carrascoy Fault borders the Guadalentín Depression to the south, which is a densely populated area with extensive agricultural activity. Therefore, this faults system represents a seismic hazard with significant social and economic implications. We have constructed two velocity-depth models based on P-wave tomography and Multichannel Analysis of Surface Waves (MASW) acquired from seismic reflection data. The resulting velocity models have allowed us to interpret the first ~250m depth and have revealed: i) the thickness of the critical zone; ii) the geometry of the Algezares-Casas Nuevas Fault; iii) the depth of the Messinian/Tortonian contact and iv) the presence of blind thrusts and damage zones under the Guadalentín Depression. Our results have also helped us to estimate an apparent vertical slip rate of 0.66±0.06m/ky for the Algezares-Casas Nuevas Fault since 209.1±6.2ka. Our results provide a methodological and backflow protocol to study the shallow subsurface of active faults, complementing previous geological models based on paleoseismological trenches, and can be used to improve the seismic hazard assessment of tectonically active regions around the world. PB Instituto de Ciencias de la Tierra "Jaume Almera" (Barcelona) SN 1695-6133 YR 2022 FD 2022 LK https://hdl.handle.net/20.500.14352/72131 UL https://hdl.handle.net/20.500.14352/72131 LA eng NO Ministerio de Economía y Competitividad (MINECO) NO Ministerio de Ciencia e Innovación (MICINN) NO Generalitat de Catalunya NO Universidad de Salamanca NO Junta de Castilla y León/FEDER DS Docta Complutense RD 9 abr 2025