gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2024-15-4-0777ELARBHgtcrust-1889Research ArticleТЕКТОНОФИЗИКАTECTONOPHYSICSВЛИЯНИЕ ХОЛМОВ И ДОЛИН НА АМПЛИФИКАЦИЮ СВОБОДНОЙ ПОВЕРХНОСТИ ПРИ ДИНАМИЧЕСКОМ РАСПРОСТРАНЕНИИ РАЗРЫВА ПО ПАДЕНИЮ РАЗЛОМАINFLUENCE OF HILLS AND VALLEYS ON FREE SURFACE SLIP AMPLIFICATION IN DYNAMIC RUPTURE ON A DIPPING FAULTПарлаР.ParlaR.

502285, Хайдарабад

Hyderabad 502285

parlarajesh17@gmail.comСомалаС. Н.SomalaS. N.

502285, Хайдарабад

Hyderabad 502285

Индийский технологический институтИндияIndian Institute of TechnologyIndia202418082024154777777Copyright © Парла Р., Сомала С.Н., 20242024Парла Р., Сомала С.Н.Parla R., Somala S.N.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.gt-crust.ru/jour/article/view/1889

Сценарии динамического распространения разрывов по разломам с различной геометрией широко освещаются в литературе применительно к областям с плоской верхней поверхностью. Тем не менее рельеф земной поверхности, в частности при наличии тектонического режима, может быть с уклоном вверх или вниз в зависимости от условий разломообразования. В данной статье рассматривается модель разлома с углом падения 60°, основанная на двумерном показателе динамического разрыва НТН10 Южнокалифорнийского центра по изучению землетрясений (SCEC). Элемент рельефа по соседству с разломом имеет вид холма или долины. Форма изгиба варьировалась от полукруга до кривой Гаусса. Рассматривается влияние топографических элементов (долин или холмов) на амплитуду смещения по разлому. Расстояние, на котором находится тот или иной элемент рельефа, также влияет на количество смещения при разрыве по разлому. В статье суммируются результаты построения двух полуокружностей разных радиусов и эквивалентные стандартные отклонения кривой Гаусса. Показано, что рельеф рядом с разломом может влиять на величину смещения по поверхности разлома.

Dynamic rupture scenarios on various fault geometries are studied extensively in the literature for domains with the planar top surface. However, landscapes on the earth, particularly in tectonic regimes, can undulate upwards or downwards depending on faulting conditions. In this paper, we studied a dipping fault model with a dip fault angle of 60 degrees, inspired by the 2D version of dynamic rupture benchmark TPV10 from the Southern California Earthquake Center (SCEC). A topographic feature adjacent to the fault is introduced in the form of a hill or a valley. The shape of the undulation was varied from semi-circular form to Gaussian profile. This paper examines the impact of topographic features (valleys or hills) on slip amplitude on a fault. The distance at which the features exist also affects the amount of slip on fault, ruptured in that region. The results for a couple of different radii of semi-circular formation and equivalent standard deviation of Gaussian undulation are also summarized in this paper. The study depicts that the topography in the vicinity of the fault can affect the magnitude of slip propagation on fault surface.

 

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The authors declare that there are no conflicts of interest present.