UDC 551.24

https://doi.org/10.26516/2541-9641.2025.4.193

EDN: OVMGYU

Physical Modeling of Seismogenic Fault Activation

S.A. Bornyakov¹, I.A. Panteleev², A.N. Shagun¹, A.A. Karimova^1,3, D.V. Salko¹

¹Institute of the Earth's Crust, Irkutsk, Russia

²Institute of Continuum Mechanics, Perm, Russia

³Irkutsk State University, Irkutsk, Russia

Abstract. Physical modeling of seismogenic fault activation using the stick-slip mechanism was performed in an elastic-plastic lithosphere model with comprehensive instrumental recording of the deformation process in the model. Computer processing of photographs obtained from the models using digital image correlation and the results of processing data from laser sensors and accelerometers revealed that:

— deformations in the model fault wings occur in a low-frequency oscillatory mode, at a constant model loading rate, with different oscillation frequencies and amplitudes in the active and passive wings;

— an increase in stress in the model is accompanied by a decrease in oscillation frequency and an increase in their amplitude;

— pulsed activation of the model fault is preceded by an autowave deformation process in the high-frequency range (4–14 Hz), followed by a halving of the predominant frequencies and a 1.5-fold increase in amplitude.

Keywords: physical modeling, fault, deformation, earthquake source, seismogenic activation, oscillation spectrum.

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Bornyakov Sergey Alexandrovich,

Candidate of Geological and Mineralogical Sciences,

664033, Irkutsk, Lermontov st., 128,

Institute of the Earth's Crust SB RAS,

Leading Researcher,

tel.: (3952)42-63-81,

еmail: bornyak@crust.irk.ru

Panteleev Ivan Alekseevich,

Doctor f-m. Sci.,

664033, Perm, Lenin st., 13a,

PFRC URAL BRANCH OF THE RUSSIAN ACADEMY OF SCIENCES,

Head. lab. Digitalization of Mining Engineering

processes,

tel.: +7(3422) 378317,

email: pia@icmm.ru

Shagun Artem Nikolaevich,

664033, Irkutsk, Lermontov st., 128,

Institute of the Earth's Crust SB RAS,

Leading Engineer,

tel.: (3952)42-58-23,

Salko Denis Vladimirovich,

664033, Irkutsk, Lermontov st., 128,

Institute of the Earth's Crust SB RAS,

Leading Engineer,

tel.: (3952)42-58-23,

еmail: denis@salko.net

Karimova Anastasia Alekseevna,

Candidate of Geological and Mineralogical Sciences,

664033, Irkutsk, Lermontov st., 128,

Institute of the Earth's Crust SB RAS,

Junior Researcher,

664003, Irkutsk, Karl Marx st., 1,

Irkutsk State University,

Associate Professor,

tel.: (3952)42-63-81,

еmail: geowomen_nasty@mail.ru

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