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Título:
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Acoustic and seismic imaging of the Adra Fault (NE Alboran Sea): in search of the source of the 1910 Adra earthquake
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Autores:
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Gràcia Mont, Eulalia ;
Bartolomé de la Peña, Rafael ;
Lo Iacono, C. ;
Moreno, X. ;
Stich, Daniel ;
Martínez Díaz, José J. ;
Bozzano, G. ;
Martínez Loriente, Sara ;
Perea, H. ;
Díez Tagarro, Susana ;
Masana, Eulàlia ;
Dañobeitia, J.J. ;
Tello, O. ;
Sanz, J.L. ;
Carreño, E. ;
Farran, M. ;
Andara, E. ;
Pérez, S. ;
Román Alpiste, M.J.
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Tipo de documento:
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texto impreso
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Editorial:
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Copernicus Publ., 2012
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Dimensiones:
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application/pdf
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Nota general:
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cc_by
info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Geología: Geodinámica
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Tipo = Artículo
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Resumen:
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Recently acquired swath-bathymetry data and high-resolution seismic reflection profiles offshore Adra (Almería, Spain) reveal the surficial expression of a NW–SE trending 20 km-long fault, which we termed the Adra Fault. Seismic imaging across the structure depicts a subvertical fault reaching the seafloor surface and slightly dipping to the NE showing an along-axis structural variability. Our new data suggest normal displacement of the uppermost units with probably a lateral component. Radiocarbon dating of a gravity core located in the area indicates that seafloor sediments are of Holocene age, suggesting present-day tectonic activity. The NE Alboran Sea area is characterized by significant low-magnitude earthquakes and by historical records of moderate magnitude, such as the Mw = 6.1 1910 Adra Earthquake. The location, dimension and kinematics of the Adra Fault agree with the fault solution and magnitude of the 1910 Adra Earthquake, whose moment tensor analysis indicates normal-dextral motion. The fault seismic parameters indicate that the Adra Fault is a potential source of large magnitude (Mw = 6.5) earthquakes, which represents an unreported seismic hazard for the neighbouring coastal areas.
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En línea:
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https://eprints.ucm.es/36038/1/nhess-12-3255-2012.pdf
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