Nuevos datos de actividad paleosísmica de la falla de Alhama de Murcia en el abanico de La salud (segmento Lorca-Totana), Béticas orientales
- C. Canora 1
- C. Roca 1
- J. Martínez-Díaz 1
- J.M. Insua-Arévalo 1
- F. Martín-González 2
- J. Alonso-Henar 1
- D. Gómez-Ortiz 2
- P. Martínez-Pagan 3
- E. Masana 4
- M. Ortuño 4
- M. Ferrater 4
- A. Medialdea 5
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1
Universidad Complutense de Madrid
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2
Universidad Rey Juan Carlos
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- 3 Univ. Politécnica de Cartagena
- 4 Univ. de Barcelona
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5
University of Sheffield
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ISSN: 1576-5172
Year of publication: 2016
Issue Title: IX CONGRESO GEOLÓGICO DE ESPAÑA
Issue: 16
Pages: 563-566
Type: Article
More publications in: Geotemas (Madrid)
Abstract
The Alhama de Murcia Fault (FAM) is a left-lateral strike-slip fault with reverse component. This fault is located in the southeast of Spain and produces the 2011 Lorca earthquake (Mw 5.2), that was the most catastrophic earthquake occurred in Spain in the last 50 years. In this paper we present the analysis of two paleoseismic trenches excavated in La Salud alluvial fan, with the aim to obtain new recurrence data for the eastern section of the Lorca-Totana segment of the fault. The structure that we observed in the trenches is recognizable in the electric tomography and GPR profiles undertaken in the study area. Both the paleoseismic trenches and the geophysics analysis are consistent with the existence of a fault plane dipping 30º to the south. This fault plane deforms the younger fluvial fan deposits. The paleoseismic study indicates the existence of between 3 and 6 surface rupture events in the last 31 ka for this strand of the fault.