o:344 Sensitivity of a Simple Earthquake Nucleation Model to Small Parameter Perturbation: Conditions for the Occurrence of Deterministic Chaos en ABSTRACT: A new mechanism that may account for the onset of chaotic dynamics of earthquake faults is proposed and analyzed. The concept is to build on the Burridge-Knopoff model, which integrates the spring-block setup with the DieterichRuina’s rate- and state-dependent friction law to interpolate for the key aspects of earthquake episodes, including the seismic nucleation, fracture propagation and arrest, as well as the rupture healing. Results obtained indicate that determistic chaos occur in case frictional parameters exhibit small oscillations about their equilibrium values. Based on the construction of appropriate phase portraits, power spectra and the Lyapunov exponents it could be concluded that a single time-dependent parameter is sufficient for the chaotic behavior to emerge, while the fully developed chaos is found when two perturbed parameters are brought into play. Spring-block model, External perturbation, Deterministics chaos 1552101 2812-9474 1552099 10.5937/engtoday2201027K 2022-05-30T09:46:02.865Z 44 no 46 Srđan Kostić Institut za vodoprivredu "Jaroslav Černi" 0000-0002-3705-3080 Nebojša Vasović University of Belgrade Faculty of Mining and Geology person Jelena Trivan University of Banja Luka, Faculty of Mining, Prijedor, Bosnia and Herzegovina person application/pdf 1094526 https://unilib.phaidrabg.rs/o:344 no yes 1 70 92000001 71A04 Engineering Today 1 1 27 33 Faculty of Mechanical and Civil Engineering in Kraljevo 2022 Received 9 February 2022 Accepted 3 March 2022 Published: 15 May 2022