Análisis geológico del terremoto histórico de Pinos Puente (1806, Granada, S España)
- J. Elez 1
- P.G. Silva 1
- J.L. Giner-Robles 2
- M.A. Rodríguez-Pascua 3
- E. Roquero 4
- R. Pérez-López 3
- T. Bardají 5
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1
Universidad de Salamanca
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2
Universidad Autónoma de Madrid
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3
Instituto Geológico y Minero de España
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- 4 Universidad Politécnica (UPM)
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5
Universidad de Alcalá
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ISSN: 1576-5172
Year of publication: 2021
Issue Title: X Congreso Geológico de España
Issue: 18
Pages: 1003
Type: Article
More publications in: Geotemas (Madrid)
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Abstract
For the study of the 1806 Pinos Puente event (VIII EMS), the analysis of the Environmental Earthquake Effects (ESI-07 scale) was combined with that of the Archaeological Effects. The information dispersed in documentary sources was compiled and effects catalogued. An intensity map has been elaborated and a modeling has been carried out using ShakeMaps, adapting the standard methodologies of the United States Geological Survey to the particularities of historical earthquakes (Silva et al., 2017). This event shows an intensity of VIII (EMS and ESI-07). In the macro-seismic area, of about 60 km2, more than 80% of the buildings suffered relevant damage and 7% were completely destroyed. The geometry of the intensity zones ≥ VI (practically constrained to the Granada Basin) indicates a strong seismic amplification related to the thick register of unconsolidated Quaternary materials in the floodplain of the Genil River. The ShakeMap that best explains the compiled ear- thquake geological effects points out to the Pinos Puente segment of the Sierra Elvira-Dilar normal fault (Sanz de Galdeano et al., 2012) as the more probable seismogenic source. The best fitting model results from a fault length of 6.0 km, dipping about 60º SW and Mw 5.8, generating maximum horizontal accelerations (PGA) above 0.30 g in large areas. This work has been funded by the QTECSPAIN project MINECO-FEDER CGL2015-67169-P, USAL.