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Solid Earth An interactive open-access journal of the European Geosciences Union

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doi:10.5194/se-2016-146
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
29 Nov 2016
Review status
A revision of this discussion paper is under review for the journal Solid Earth (SE).
Earthquake static stress transfer in the 2013 Valencia Gulf (Spain) seismic sequence
Lluis Salo1,2, Tanit Frontera2, Xavier Goula2, Lluis Pujades1, and Alberto Ledesma1 1Department of Civil and Environmental Engineering, Universitat Politecnica de Catalunya, Barcelona, 08034, Spain
2Institut Cartografic i Geologic de Catalunya, Barcelona, 08038, Spain
Abstract. On September 24th, 2013, a ML 3.6 earthquake struck in Valencia Gulf (Spain), near the Mediterranean coast of Castellon, roughly a week after the gas injections conducted in the area to develop an Underground Gas Storage had been halted. The event, felt by the nearby population, led to a sequence build-up of felt events which reached a maximum of ML 4.3 on October 2nd.

Here, we study the role of static stress change as an earthquake triggering mechanism during the sequence, and provide quantitative assessment of the known faults final stress state. By means of the Coulomb Failure Function, the evolution of static stress is quantified both on fault planes derived from focal mechanism solutions (which act as source and receiver faults), and on the previously mapped structures in the area (receiver faults). Results show that static stress transfer could have acted as a partial trigger, and point towards an ESE-dipping structure as the most likely to have been activated during the sequence. Based on this approach, the influence of the studied events in the occurrence of future and potentially damaging earthquakes in the area would be, at most, of second order.


Citation: Salo, L., Frontera, T., Goula, X., Pujades, L., and Ledesma, A.: Earthquake static stress transfer in the 2013 Valencia Gulf (Spain) seismic sequence, Solid Earth Discuss., doi:10.5194/se-2016-146, in review, 2016.
Lluis Salo et al.
Lluis Salo et al.
Lluis Salo et al.

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Short summary
Fault movement on the crust is governed by stress-strain levels. Our study focuses on the effect of a particular mechanism that can cause earthquakes due to stress transfer between faults. Our findings on its influence in the studied events advocate for it to have acted as a partial trigger, although the experienced sequence would most likely not have shortened the occurrence of future damaging shakes. The study aims at providing insight on an issue related to energy resources management.
Fault movement on the crust is governed by stress-strain levels. Our study focuses on the effect...
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