RT Journal Article
T1 Acoustic and seismic imaging of the Adra Fault (NE Alboran Sea): in search of the source of the 1910 Adra earthquake
A1 Gràcia Mont, Eulalia
A1 Bartolomé de la Peña, Rafael
A1 Lo Iacono, C.
A1 Moreno, X.
A1 Stich, Daniel
A1 Bozzano, G.
A1 Martínez Loriente, Sara
A1 Perea, H.
A1 Martínez Díaz, José Jesús
A1 Díez Tagarro, Susana
A1 Masana, Eulàlia
A1 Dañobeitia, J.J.
A1 Tello, O.
A1 Sanz, J.L.
A1 Carreño, E.
A1 Farran, M.
A1 Andara, E.
A1 Pérez, S.
A1 Román Alpiste, M.J.
AB 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.
PB Copernicus Publ.
SN 1684-9981
YR 2012
FD 2012
LK https://hdl.handle.net/20.500.14352/44923
UL https://hdl.handle.net/20.500.14352/44923
LA eng
NO Ministerio de Ciencia e Innovación (MICINN)
DS Docta Complutense
RD 28 abr 2025