This repository contains datasets used for the article "Improved geological slip rate estimations in the complex Alhama de Murcia Fault zone (SE Iberia) and its implications for fault behaviour" published in Tectonics.
The dataset includes two zip files:
A. Uninterpreted_trenches: This folder contains PDF files with uninterpreted photologs of all the trenches carried out in the paleoseismic survey of the study. Each file contains all the trenches from a paleoseismic site, as named in the paper.
B. MATLAB_codes: This folder contains MATLAB codes to compute the probability density functions of the slip rates, based on fault slips and numerical dates obtained in the trenches. These codes are intented to be run using the code by Zechar and Frankel (2009) and are written based on the format designed by these authors. A separate code for each trench and slip component is provided. To read and edit these files use MATLAB or an open source code editor such as Spyder.

The data from this article is part of the doctoral thesis of Octavi Gómez-Novell developed at the University of Barcelona. You can findn it publicly available at: http://hdl.handle.net/2445/183755


*For any further requests or suggestions, please write to the corresponding author of the publication, Octavi Gómez-Novell (ogomezno@gmail.com).

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Eulàlia Masana (12863422)

Jose Martinez-Diaz (9577313)

Juan Miguel Insua-Arévalo (10123919)

Julián García-Mayordomo (9747188)

María Ortuño (12863419)

Octavi Gómez-Novell (10897038)

Raimon Pallàs (8875931)

Stéphane Baize (5259361)

Thomas K. Rockwell (8758107)

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Dataset: Improved geological slip rate estimations in the complex Alhama de Murcia Fault zone (SE Iberia) and its implications for fault behavior

International audienceFault slip rate is one of the most crucial parameters to characterize earthquake occurrence in fault-based seismic hazard assessments (SHA). Accordingly, paleoseismic studies have increasingly focused on constraining this parameter in active faults worldwide. We present a comprehensive paleoseismic study in the Alhama de Murcia Fault (AMF), one of the most active faults in SE Spain and source of destructing earthquakes such as the 2011 Mw 5.2 Lorca event. Contrasting with previous studies, we integrate paleoseismic data from four fault strands in the AMF and, based on trench slip analysis and numerical dates, we derive slip rate estimates of each strand over the whole transect and assess their time variability. The AMF has a minimum net slip rate between 1.35+0.16/−0.10 and 1.64+0.16/−0.11 mm/yr for the past 18 ± 1 to 15.2 ± 1.1 ka. These results prove the importance of accounting for the complete sections of a geological structure as they are almost twice the previous estimates for a single fault branch. Slip rate variability is identified in the AMF, with cyclic acceleration-quiescence patterns that could be related to stress field changes driven by fault interaction or synchronicity with neighboring faults (e.g., Carrascoy). We hope that the data presented here motivates their inclusion into forthcoming fault-based SHAs. In this regard, limitations related to the lack of paleoseismic data for one fault strand, along with poor characterization of the strike component of slip and insufficient age control of the units for another strand are highlighted and need to be accounted for by modelers

Gómez‐novell, O

Ortuño, M.

García‐mayordomo, J

Insua‐arévalo, J, M

Rockwell, T, K

Baize, S.

Martínez‐díaz, J, J

Pallàs, R.

Masana, E.

Institute for Radiation Protection and Nuclear Safety (IRSN)

Improved Geological Slip Rate Estimations in the Complex Alhama de Murcia Fault Zone (SE Iberia) and Its Implications for Fault Behavior

Fault slip rate is one of the most crucial parameters to characterize earthquake occurrence in fault-based seismic hazard assessments (SHA). Accordingly, paleoseismic studies have increasingly focused on constraining this parameter in active faults worldwide. We present a comprehensive paleoseismic study in the Alhama de Murcia Fault (AMF), one of the most active faults in SE Spain and source of destructing earthquakes such as the 2011 Mw 5.2 Lorca event. Contrasting with previous studies, we integrate paleoseismic data from four fault strands in the AMF and, based on trench slip analysis and numerical dates, we derive slip rate estimates of each strand over the whole transect and assess their time variability. The AMF has a minimum net slip rate between 1.35+0.16/−0.10 and 1.64+0.16/−0.11 mm/yr for the past 18 ± 1 to 15.2 ± 1.1 ka. These results prove the importance of accounting for the complete sections of a geological structure as they are almost twice the previous estimates for a single fault branch. Slip rate variability is identified in the AMF, with cyclic acceleration-quiescence patterns that could be related to stress field changes driven by fault interaction or synchronicity with neighboring faults (e.g., Carrascoy). We hope that the data presented here motivates their inclusion into forthcoming fault-based SHAs. In this regard, limitations related to the lack of paleoseismic data for one fault strand, along with poor characterization of the strike component of slip and insufficient age control of the units for another strand are highlighted and need to be accounted for by modelers.Ministerio de Economía, Industria y CompetitividadMinisterio de Ciencia e InnovaciónDepto. de Geodinámica, Estratigrafía y PaleontologíaFac. de Ciencias GeológicasTRUEpu

Dataset: Improved geological slip rate estimations in the complex Alhama de Murcia Fault zone (SE Iberia) and its implications for fault behavior

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