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| Titel |
Acoustic and seismic imaging of the Adra Fault (NE Alboran Sea): in search of the source of the 1910 Adra earthquake |
| VerfasserIn |
E. Gràcia, R. Bartolomé, C. Iacono, X. Moreno, D. Stich, J. J. Martínez-Diaz, G. Bozzano, S. Martínez-Loriente, H. Perea, S. Diez, E. Masana, J. J. Dañobeitia, O. Tello, J. L. Sanz, E. Carreño, EVENT-SHELF Team |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 12, no. 11 ; Nr. 12, no. 11 (2012-11-07), S.3255-3267 |
| Datensatznummer |
250011186
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| Publikation (Nr.) |
 copernicus.org/nhess-12-3255-2012.pdf |
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| Zusammenfassung |
| 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. |
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