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Explorando las incertidumbres de los parámetros de falla en el Mar de Alborán a partir del modelado de tasas de sismicidad

Authors: Gómez-Novell, Octavi; Perea, Héctor; Jiménez, María José; García-Fernández, Mariano; Lozano, Lucía; García Mayordomo, Julián; Sánchez-Roldán, José Luis; +2 Authors

Explorando las incertidumbres de los parámetros de falla en el Mar de Alborán a partir del modelado de tasas de sismicidad

Abstract

[ES] El Mar de Alborán es una de las regiones más sísmicamente activas de Europa Occidental, acomodando parte importante de la convergencia NW-SE entre África y Eurasia. Las principales fallas de la zona han sido responsables de grandes terremotos (IEMS>IX) desde el período histórico, pero la gran mayoría tienen estimaciones pobres de la tasa de deslizamiento y actividad, y se conoce poco acerca de su capacidad para interactuar y romper en patrones de rotura complejos. En este estudio, calculamos varios modelos de tasas de ruptura sísmica para el Mar de Alborán con el código SHERIFS (Chartier et al. 2019) y utilizando un árbol sistemático de exploración de parámetros para determinar los parámetros de cada modelo. Basamos el árbol de exploración en variaciones de la tasa de deslizamiento y diferentes escenarios de ruptura multi-falla para investigar su incertidumbre epistémica. Para cuantificar la viabilidad de las tasas de terremotos calculadas de cada modelo, las comparamos con las tasas reales de sismicidad observadas en la región, priorizando aquellas que tienen un mejor ajuste para la evaluación del peligro sísmico. Los resultados de nuestro trabajo pueden fomentar la discusión entre los investigadores que trabajan en la zona y motivar nuevas investigaciones sobre el comportamiento de las fallas

[EN] The Alboran Sea is one of the most seismic regions of Western Europe, accommodating an important part of the NW-SE convergence between the African and Eurasian plates. The major faults within have been responsible of large earthquakes (IEMS>IX) since historical times, but most of them have poor slip and activity rate estimates, and their capability to interact and rupture in complex rupture patterns is poorly known. In this study, we compute several models of earthquake rupture rates for the Alboran Sea with the SHERIFS code (Chartier et al. 2019) and using a systematic parameter exploration tree to determine the parameters of each model. We base the exploration tree on slip rate variations and different multi-fault rupture scenarios to investigate their epistemic uncertainty. To check the feasibility of the computed earthquake rates of each model, we compare them with the real observed seismicity rates in the region, prioritizing those that perform better for the hazard assessment The results of our work may enhance discussion among researchers working in the area and motivate further investigations into fault behavior

With the institutional support of the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S)

XI Congreso Geológico de España, 2-6 de julio 2024, Ávila.-- 1 page

Keywords

Tasas de sismicidad, Slip rate, Multi-falla, Peligro sísmico, Mar de Alborán

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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Average
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