[EN] Although several geodetic studies reveal motion across the Alboran Basin, the low seismicity derived of the slowness of the structures has put the seismic and tsunamigenic potential of the faults on a second order problem. Due to the recent earthquakes recorded in the region (e.g. January 2016 Mw= 6.4) , with magnitudes high enough to cause considerable damage in the nearby cities and to be felt in all the coastal cities surrounding the basin, this concept is rapidly changing. Moreover, despite the low slip rate estimated for the faults at this region, their seismic potential resides on their large dimensions. Most of them coincide with crustal scale boundaries, are well oriented to the present-day stress regime and show a seafloor morphological expression that points out to their present (upper Quaternary) activity. Considering that the location of these faults seems to be controlled by the lithospheric configuration of the basin, a suitable characterization to the crustal domain is fundamental to define these tectonic boundaries and to estimate its seismic and associated tsunamigenic hazard. Within this study we propose to identify the active tectonic structures and to estimate their seismogenic potential by advancing in the deep structure characterization

[ES] Aunque los estudios geodésicos revelan movimiento en la cuenca de Alborán, la baja sismicidad registrada ha puesto el potencial sísmico y tsunamigénico de estas estructuras en un segundo plano. Debido a los recientes terremotos registrados en la zona (ej. enero 2016, Mw=6,4), con magnitud suficiente para afectar a las ciudades costeras adyacentes y causar daños, este concepto está cambiando. A pesar de la baja sismicidad registrada instrumentalmente, causada por la baja velocidad en el movimiento de estas fallas, el potencial sísmico de estas estructuras reside en sus grandes dimensiones. Muchas de estas fallas actúan como límites a escala cortical, bien orientadas en el sistema de esfuerzos actual y por lo tanto, activas. Su localización parece estar controlada por la configuración litosférica de la zona, por lo que una correcta caracterización de la estructura profunda es fundamental para definir estas fallas de grandes dimensiones y su potencial sísmico asociado

Inciativa Ibérica para el Estudio de las Fallas Activas, Tercera Reunión Ibérica sobre Fallas Activas y Paleosismología IBERFAULT 2018 - Third Iberian Meeting on Active Faults and Paleoseismology, 11-13 June 2018, Alicante, Spain.-- 4 pages, 1 figure, 1 table

This work was supported by the Spanish Ministry of Education, Culture and Sport through the FPU fellowship 2013-2017 to L. Gómez de la Peña (AP2012-1579). Part of this project have been funded by the Cluster of Excellence ‘The Future Ocean’

Peer Reviewed