New and reactivated effects on the architectural heritage of Lorca caused by the May 2011 earthquake
DOI:
https://doi.org/10.21701/bolgeomin.123.4.006Keywords:
earthquake architectural effects (EAEs), Lorca earthquake, oriented seismic deformations, reactivated EAEs, structural geological analysisAbstract
The earthquake of 11 May 2011 caused a series of structural deformations which affected the architectural heritage of the city of Lorca. We have classified and studied all these earthquake architectural effects (EAEs) according to the tenets of geological structural analysis to ascertain the direction of the movements responsible. We have furthermore identified two new EAEs which complete the previous classification. Accordingly, we were able to estimate the orientation of the maximum horizontal movement of the ground, which turned out to trend NW-SE on average. It was also clear that the deformations generated by the present earthquake shared very similar characteristics and even the same orientation of the maximum horizontal movement with those of the recorded earthquake of 1674. Most of these structures moved in a similar direction again during the 2011 earthquake, indicating that the Lorca-Totana segment of the Alhama de Murcia fault (FAM) triggered both and that both had similar values of seismic intensity, affected a very similar area and resulted in the same type of building damage and EAE orientation.
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