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handle: 10261/190169 , 10261/150647
[ES] El sistema de fallas Alhama-Murcia (FAM) se halla en la cordillera Bética, al sur de la Península Ibérica. Con orientación NE-SW tiene una extensión de unos 100 km y ha sido ampliamente cartografiada para caracterizar su estructura superficial, pero hay poca informaciónsobre su estructra y geometría en profundidad. El terremoto destructivo de Lorca (Mw 5.2) ocurrido en 2011 se asocia a esta falla. En el marco del proyecto de investigación InterGEO que tiene por objetivo el desarrollo de Obsevatorios cercanos a fallas activas (NFO), se obtuvieron una serie de modelos geofísicos 2D en distintos transectos del sistema. En esta comunicación se presentan los modelos sísmicos (refracción, reflexión y MASW) y un perfil eléctrico (ERT) profundoobtenidos para el transecto de la Torrecilla, situados a 3 km al SW de Lorca donde la zona de falla está más concentrada. Los resultados de estos modelos se correlacionan con un sondeo de invetsigación de 175 m de profundidad perforado cerca de la rambla de La Torrecilla.
[EN] The Alhama-Murcia system fault (AMF) is placed in Betic mountain range to the south of the Iberian Peninsula. This NE-SW oblique fault, extended up to 100 km, has been extensively mapped to characterize its surface structure but almost no information is available of the structure and geometry at depth. The destructive earthquake of Lorca (Mw 5.2) occurred on 2011 is associated with this fault. Within the InterGEO research project with the aim to be the seed for the development of a future Near Fault Observatories (NFO), 2D geophysical models were carried out cutting the AMF at several segments. In this communication we present the seismic models (refraction, reflection and MASW) and the 2D electrical resistivity profile (ERT) obtained in the Torrecilla transect, three km SW of Lorca where the fault zone shearing is more concentrated. The results of these 2D models are correlated with the results of the scientific borehole FAM-1 a 175 m depth drilled close to La Torrecilla rambla.
Trabajo presentado en la 9ª Asamblea Hispano Portuguesa de Geodesia y Geofísica, celebrada en Madrid (España), del 28 al 30 de junio de 2016
Peer reviewed
Alhama-Murcia system fault
Alhama-Murcia system fault
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