Resumen de Análisis geológico del terremoto de Torrevieja de 1829 (Alicante, SE España)
Pablo G. Silva Barroso, Javier Elez Villar, Jorge Luis Giner Robles, Raúl Pérez-López, Elvira Roquero, Míguel Ángel Rodríguez Pascua, Teresa Bardaji Azcárate, Antonio Miguel Martínez Graña
This work examines from a geological point of view the data on the 1829 Torrevieja Earthquake (IX-X Intensity) reported by Larramendi (1829) and De Prado (1863). The study evidences the dichotomy of the dominant geological processes occurred in the hanging-wall and foot-wall of the Lower Segura reverse fault, the seismogenic source of the earthquake. In the foot-wall (Lower Segura Depression) the poorly compactednature of sediments and reclaimed lands triggered devastating liquefaction, ground cracking and lateral spreading processes affecting the river margins and the ditch irrigation-system of the area (ancient delta distributary channels). On the contrary, in the hanging-wall hydrogeological anomalies were no widespread, but a permanent uplift of c. 20-22 cm was reported in the littoral zone and the Torrevieja salt-marshes. The uplift was recorded between Torrevieja and Cabo Cervera, about 4 km to the north, butprobably the uplift affected to the c.15 km separating Torrevieja and Guadarmar, all along the entire hanging-wall of the LowerSegura Fault.
