Constraining earthquake fault sources through the use of intensity data and seismic scenarios: application to the Betic Cordillera (South Spain)

Frontiers in Earth Science

Earth Science

Yolanda De Pro-Díaz¹  Juan Miguel Insua-Arévalo¹  José J. Martínez-Díaz²  Carolina Canora³  Hector Perea⁴ 

[1] Department of Geodynamics, Stratigraphy and Paleontology, Universidad Complutense de Madrid, Madrid, Spain;Department of Geodynamics, Stratigraphy and Paleontology, Universidad Complutense de Madrid, Madrid, Spain;Instituto de Geociencias (IGEO), Universidad Complutense de Madrid-Consejo Superior de Investigaciones Científicas, Madrid, Spain;Department of Geology and Geochemistry, Universidad Autónoma de Madrid, Ciudad Universitaria de Cantoblanco, Cantoblanco, Spain;Institut de Ciències Del Mar, Consejo Superior de Investigaciones Científicas, Barcelona, Spain;

关键词: Betics;    SE Spain;    2011 Lorca earthquake;    1804 Dalías earthquake;    1680 Málaga earthquake;    seismic source;    intensity field;   

DOI  :  10.3389/feart.2023.1214836

 received in 2023-04-30, accepted in 2023-08-14,  发布年份 2023

来源: Frontiers

【 摘 要 】

Macroseismic observations can be useful to study pre-instrumental earthquakes when paleoseismological analysis are not viable for various reasons (e.g., erosion or lack of sedimentation). The analysis of the distribution of the macroseismic intensity data points and the reports about geological effects has been shown as a tool that may provide meaningful information to localize the fault source of a historical earthquake. Using this approach, we have studied two earthquakes in the Betic Cordillera (South Spain), the 1804 Dalías and the 1680 Málaga events, and we have used the 2011 Lorca earthquake as a test subject to calibrate the methodologies. During the calibration process, we also find the best performing combination of ground-motion models and ground-motion-to-intensity-conversion equations for generating seismic scenarios in this area. Even though the results for the Málaga earthquake were not conclusive, our methodology successfully identified the most likely source for the Dalías earthquake: a conjunct rupture of the Loma del Viento and Llano del Águila Faults.

【 授权许可】

Unknown   
Copyright © 2023 De Pro-Díaz, Perea, Insua-Arévalo, Martínez-Díaz and Canora.