Despliegue de una red sísmica local semipermanente en la región del norte del Guadiana Menor (Cordillera Bética)

Abstract

[EN] In the last decade, the Guadiana Menor River region, in the Guadalquivir foreland Basin, has suffered some low to moderate magnitude seismic sequences. For instance, the 2012-2013 Sabiote-Torreperogil seismic sequence, 1 to 5 km deep, being the biggest recorded event a mbLg 3.9, and the 2016-2018 Jódar-Peal de Becerro seismic sequence, less than 2 km and other events at 9 to 13 km deep, located 20 km southeast of the previous one, being a mbLg 4.1 earthquake the greatest recorded magnitude. In the last years, the Spanish IGN national seismic network has also recorded several low magnitude earthquakes in the region, clearly showing that the fault that hosted the 2016-2018 seismic sequence continues to be active.This has been the reason to deploy a local seismic network in the region, designed with the aim to study this persistent seismicity in terms of both locations and focal mechanism solutions. It is equipped with seven triaxial broadband sensors, also sharing data coming from two nearby IGN seismic stations. Most of them are recording data from September 2021. Real-time records are shared with the Spanish IGN seismic network in order to improve regional locations.