Современная геодинамика и фокальные механизмы землетрясений…

ГЕОФИЗИЧЕСКИЕ ПРОЦЕССЫ И БИОСФЕРА. 2018. T. 17, № 3. С. 90–108. DOI 10.21455/GPB2018.3-6

СОВРЕМЕННАЯ ГЕОДИНАМИКА
И ФОКАЛЬНЫЕ МЕХАНИЗМЫ ЗЕМЛЕТРЯСЕНИЙ
В ОКРЕСТНОСТИ БУШЕРСКОЙ АЭС

Институт физики Земли им. О.Ю. Шмидта РАН, г. Москва, Россия

Детальные сейсмологические исследования, выполненные сейсмологической экспедицией Института физики Земли им. О.Ю. Шмидта РАН в 1999–2001 гг. в окрестности Бушерской АЭС на территории Южного Ирана, позволили, в частности, разработать методику определения фокальных механизмов землетрясений с использованием направления поляризации S-волн при слабых близких сейсмических событиях. Результаты реконструкции таких определений сопоставлены с фокальными механизмами сильных землетрясений, определенных в каталогах ISC по стандартной методике, и с современными представлениями о тектонической деформации земной коры в широкой окрестности исследуемой территории. Установлено, что выполненная реконструкция находится в хорошем соответствии как с типизацией подвижек в очагах сильных землетрясений, так и с современными представлениями о характере деформирования земной коры в пределах сети наблюдений. Это позволяет рекомендовать предложенную методику реконструкции фокальных механизмов к применению и в других регионах.

Ключевые слова: тектонические деформации, геодинамика, фокальные механизмы землетрясений, кинематики сейсмотектонического деформирования.

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ЛУКК Альберт Артурович – кандидат физико-математических наук, ведущий научный сотрудник, Институт физики Земли им. О.Ю.Шмидта РАН. 123242, г. Москва, ул. Большая Грузинская, д. 10, стр. 1. Тел.: +7 (499) 254-90-35. E-mail: lukk@ifz.ru

РЕБЕЦКИЙ Юрий Леонидович – доктор физико-математических наук, заведующий лабораторией, Институт физики Земли им. О.Ю. Шмидта РАН. 123242, г. Москва, ул. Большая Грузинская, д. 10, стр. 1. Тел.: +7 (499) 254-93-50. E-mail: reb@ifz.ru

MODERN GEODYNAMICS AND FOCAL MECHANISMS
OF EARTHQUAKES IN THE NEIGHBORHOOD OF BUSHEHR NPP

Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia

Abstract. Detailed seismological studies performed by the seismological expedition of the Institute of Physics of the Russian Academy of Sciences in 1999–2001 in the vicinity of the Bushehr nuclear power plant in the territory of Southern Iran, allowed, in particular, developing a technique for determining the focal mechanisms of earthquakes using the direction of S-wave polarization in weak close seismic events. In the present work, the results of reconstruction of such determinations are compared with the focal mechanisms of strong earthquakes, determined in the ISC catalogs by the standard method, and with modern concepts of tectonic deformation of the Earth's crust in a wide neighborhood of the study area. It is established that the reconstruction carried out is in good agreement with both the typification of motions in the centers of strong earthquakes and with modern ideas about the nature of deformation of the Earth's crust within the observational network. This allows us to recommend the proposed methodology for reconstructing focal mechanisms for use in other regions.

Keywords: tectonic deformations, geodynamics, focal mechanisms of earthquakes, kinematics of seismotectonic deformation.

LUKK Albert A. – Cand. Sci. (Phys. and Math.), leading researcher, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Moscow, Russia. Tel.: +7 (499) 254-90-35. E-mail: lukk@ifz.ru

REBETSKY Yurii L. – Dr. Sci. (Phys. and Math.), head of laboratory, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Moscow, Russia. Tel.: +7 (499) 254-93-50. E-mail: reb@ifz.ru

ГЕОФИЗИЧЕСКИЕ ПРОЦЕССЫ И БИОСФЕРА 2018 Т. 17 № 3