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Title

Earthquake crisis unveils the growth of an incipient continental fault system

AuthorsGràcia, Eulàlia ; Grevemeyer, Ingo; Bartolomé, Rafael ; Perea, Héctor ; Martínez-Loriente, S. ; Gómez de la Peña, L. ; Villaseñor, Antonio ; Klinger, Yann; Lo Iacono, Claudio ; Díez Tagarró, Susana ; Calahorrano, Alcinoe ; Camafort Blanco, Miquel; Costa, Sergio ; D'Acremont, E.; Rabaute, Alain; Ranero, César R.
KeywordsInversion
Constraints
evolution
deformation
slip-rate
seismic-hazard
Alboran sea
San-Andreas fault
Africa-Iberia plate
Al-Hoceima earthquake
Issue DateSep-2019
PublisherNature Publishing Group
CitationNature Communications 10: 3482 (2019)
AbstractLarge continental faults extend for thousands of kilometres to form boundaries between rigid tectonic blocks. These faults are associated with prominent topographic features and can produce large earthquakes. Here we show the first evidence of a major tectonic structure in its initial-stage, the Al-Idrissi Fault System (AIFS), in the Alboran Sea. Combining bathymetric and seismic reflection data, together with seismological analyses of the 2016 M-w 6.4 earthquake offshore Morocco - the largest event ever recorded in the area - we unveil a 3D geometry for the AIFS. We report evidence of left-lateral strike-slip displacement, characterise the fault segmentation and demonstrate that AIFS is the source of the 2016 events. The occurrence of the M-w 6.4 earthquake together with historical and instrumental events supports that the AIFS is currently growing through propagation and linkage of its segments. Thus, the AIFS provides a unique model of the inception and growth of a young plate boundary fault system.
DescriptionThis article have a datasets associated "Regional centroid moment tensors for earthquakes in the 2016 South Alboran seismic crisis" http://hdl.handle.net/10261/177887
Publisher version (URL)https://doi.org/10.1038/s41467-019-11064-5
URIhttp://hdl.handle.net/10261/191278
DOI10.1038/s41467-019-11064-5
E-ISSN2041-1723
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