
handle: 10261/381131
[ES] El Mar de Alborán está afectado por una serie sísmica desde 2021, localizada principalmente en el monte submarino Ras Tarf. Este alto tiene aspecto de edificio volcánico y se encuentra próximo a la costa de la Cordillera del Rif. La sismicidad tiene características de enjambre, con terremotos que alcanzan una magnitud máxima de Mb=4,5. Existe discusión en la interpretación de esta actividad sísmica, que podría estar asociada a la posible reactivación de un volcán inactivo o tener un origen tectónico. La posible propagación de la actividad sísmica hacia tierra representa una amenaza. Se han integrado datos geológicos, sismicidad, gravedad, datos magnéticos y perfiles de sísmica de reflexión de la región. Los resultados sugieren un origen tectónico de la sismicidad vinculado a un cuerpo ígneo rígido y ahora frío dentro de rocas de caja más blandas. Este cuerpo frágil está afectado por los esfuerzos de la zona de cizalla Bético-Alborán-Rif, límite occidental del indentador tectónico del Mar de Alborán central
[EN] The Alboran Sea has been affected by a seismic series since 2021, predominantly centered on the Ras Tarf seamount. This high bears a striking resemblance to a volcanic edifice and is situated near the Rif Cordillera coast. The seismicity exhibits swarm characteristics, with earthquakes reaching a maximum magnitude of Mb=4.5. There are concerns about interpreting this active seismicity, whether it signifies the potential reactivation of a dormant volcano or has a tectonic origin. The potential inland spread of seismic activity poses a threat. Geological data, seismicity records, gravity, magnetic, and seismic reflection profiles have been integrated. The findings suggest a tectonic origin linked to a rigid and now cold igneous body within softer host rock. This brittle body is under stress from the nearby Betic-Alboran-Rif shear zone, the western boundary of the tectonic indenter in the central Alboran Sea
With the institutional support of the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S)
XI Congreso Geológico de España, 2-6 de julio 2024, Ávila.-- 1 page
Enjambre sísmico, Monte submarino Ras Tarf, Tectónica activa, Mar de Alborán
Enjambre sísmico, Monte submarino Ras Tarf, Tectónica activa, Mar de Alborán
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