Fault interactions and Coulomb stress triggering in complex fault networks - A model of the Western Anatolian Extensional Province

Fault interactions and Coulomb stress triggering in complex fault networks - A model of the Western Anatolian Extensional Province | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 5 February 2026 V1 Latest version Share on Fault interactions and Coulomb stress triggering in complex fault networks - A model of the Western Anatolian Extensional Province Authors : Manuel Diercks 0000-0002-3332-7267 [email protected] , Zoe K Mildon 0000-0001-6192-765X , Sarah Jean Boulton 0000-0002-8251-0025 , Ekbal Hussain 0000-0001-6921-2843 , Mehmet Cihat Alçiçek 0000-0001-7689-7625 , Tunahan Aykut 0000-0003-0503-3859 , and Cengiz Yildirim 0000-0001-5253-028X Authors Info & Affiliations https://doi.org/10.22541/au.177032774.44521143/v1 196 views 69 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Coseismic Coulomb Stress Transfer (CST) from normal faulting earthquakes generally promotes failure of along-strike faults or segments, whereas it reduces stress on across-strike faults. Nevertheless, large earthquakes occur on across-strike faults despite receiving repeated negative coseismic CST. This study explores the triggering mechanisms of large earthquakes in the rapidly deforming, geometrically complex normal fault network of SW Türkiye. We model 400 years of cumulative coseismic CST from 26 M≥6.0 earthquakes plus interseismic CST based on fault slip rates. Subsequently, uncertainties in slip rates (therefore interseismic loading) and locations of historical earthquakes are explored. We find that interseismic loading is the dominant triggering process, (over-)compensating negative coseismic CST. Even CST from repeated large earthquakes on across-strike fault zones will only delay failure but is insufficient to completely suppress large earthquakes. Relatively quiescent faults in such settings should therefore not be disregarded as hazardous seismogenic sources. Nevertheless, in geometrically complex settings, heterogeneous coseismic CST might form stress barriers, reducing rupture extent and magnitude of subsequent earthquakes. Incorporating interseismic loading into Coulomb stress models is vital for robust interpretations of fault interactions, even if fault slip rates used to model interseismic loading contain major uncertainties, as accuracy of fault slip rates used is of secondary importance. Finally, the model allows interpretations of the current stress state of the regional fault network, though interpretations regarding seismic hazard should consider the described model limitations. We emphasize the need to assess uncertainties in Coulomb stress modelling studies, especially when using the historical earthquake record. Supplementary Material File (1064663_0_merged_1770031505.pdf) Download 17.35 MB File (fault_interactions_in_complex_fault_networks_jgr_solid_earth_submission.pdf) Download 8.87 MB File (si_fault_interactions_in_complex_fault_networks_jgr_solid_earth_submit.pdf) Download 400.15 KB Information & Authors Information Version history V1 Version 1 05 February 2026 Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords earthquake mechanics earthquake triggering extensional tectonics gediz graben geology historical earthquakes static stress transfer Authors Affiliations Manuel Diercks 0000-0002-3332-7267 [email protected] University of Plymouth View all articles by this author Zoe K Mildon 0000-0001-6192-765X University of Plymouth View all articles by this author Sarah Jean Boulton 0000-0002-8251-0025 University of Plymouth View all articles by this author Ekbal Hussain 0000-0001-6921-2843 British Geological Survey View all articles by this author Mehmet Cihat Alçiçek 0000-0001-7689-7625 Pamukkale University View all articles by this author Tunahan Aykut 0000-0003-0503-3859 Istanbul Technical University View all articles by this author Cengiz Yildirim 0000-0001-5253-028X Eurasia Institute of Earth Sciences Istanbul Technical University View all articles by this author Metrics & Citations Metrics Article Usage 196 views 69 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Manuel Diercks, Zoe K Mildon, Sarah Jean Boulton, et al. Fault interactions and Coulomb stress triggering in complex fault networks - A model of the Western Anatolian Extensional Province. Authorea . 05 February 2026. DOI: https://doi.org/10.22541/au.177032774.44521143/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . 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