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2012

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cc-by (c) Gràcia, E. et al., 2012
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/98460

Acoustic and seismic imaging of the active Adra Fault (NE Alboran Sea): In search for the source of the 1910 Adra Earthquake

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Recurs relacionat

http://dx.doi.org/10.5194/nhess-12-3255-2012

Resum

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 sub-vertical 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

Matèries

Tectònica de plaques, Falles (Geologia), Terratrèmols, Sismologia

Matèries (anglès)

Plate tectonics, Faults (Geology), Earthquakes, Seismology

Citació

Col·leccions

Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)

Citació

GRÀCIA, Enric, et al. Acoustic and seismic imaging of the active Adra Fault (NE Alboran Sea): In search for the source of the 1910 Adra Earthquake. Natural Hazards And Earth System Sciences. 2012. Vol. 12, num. 11, pags. 3255-3268. ISSN 1561-8633. [consulted: 18 of August of 2026]. Available at: https://hdl.handle.net/2445/98460

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