¿Pudo el deslizamiento de Bàlitx (Sierra de Tramuntana, Mallorca) tener un origen sísmico?

Résumé

In this work we focus on analyzing the possibility that the Bàlitx landslide was triggered by an earthquake. This large slope instability (~700·106 m 3 ) is located on the coast of the central sector of the Tramuntana Range, in the island of Majorca. This area is characterized by the predominance of Jurassic limestone and dolostone, on which spectacular cliffs of several hundred metres have been developed. In the Bàlitx landslide, these carbonated materials lie on top of Triassic soft materials (Keuper facies), composed mainly of marls and clays with gypsum. The failure surface of the landslide is related to the reactivation of a normal fault. The slope stability back-analysis of the Bàlitx landslide under dynamic conditions has been useful to discriminate its possible seismic origin. The landslide could be triggered by a moderate to high magnitude earthquake (Mw=4.2-6.5) located close to the landslide ( 30 km) and probably related to some of the active faults identified in Majorca, such as those of Palma and Sencelles.