31 تیر 1403
شبير اشكپور مطلق

شبیر اشکپور مطلق

مرتبه علمی: استادیار
نشانی: دانشکده علوم و فناوری نانو و زیستی - گروه ژئو فیزیک
تحصیلات: دکترای تخصصی / فیزیک زمین
تلفن: 07731223331
دانشکده: دانشکده علوم و فناوری نانو و زیستی

مشخصات پژوهش

عنوان
ارزیابی تانسور گشتاور لرزه ای زمین لرزه های رخ داده در زاگرس مرکزی
نوع پژوهش پارسا
کلیدواژه‌ها
Moment Tensor, Central Zagros, Deviatoric Moment Tensor, Double Couple, Compensated Linear Vector Dipole
پژوهشگران زهره عباسی هفشجانی (دانشجو) ، شبیر اشکپور مطلق (استاد راهنما) ، سید رضا منصوری (استاد مشاور)

چکیده

Seismic waves contain important information about the Earth's crust. This is due to the influence of crustal structure on wave propagation. The analysis of seismic waves contributes significantly to a better understanding of the crust and the seismicity of a region. Calculation of the moment tensor based on the seismic data is one of the physical methods to analyze an earthquake. The moment tensor of an earthquake represents both its fault geometry (via different components) and its size (via the scalar moment). Also each component of the tensor represents the dynamic effect in a particular direction. The seismic moment tensor can decompose in several ways to analyze the earthquake source mechanism. In this study we calculated the seismic moment tensors using the seismic data of the events with M ?5, occurred in the Central Zagros (CZ). We decomposed each diagonolized tensor into two parts; Isotropic (Iso) and Deviatoric (M’). To evaluate the contribution of each component in seismic source, we further decomposed M into a best Double Couple (DC) and Compensated Linear Vector Dipole (CLVD) components. We found for some events with more than fifty percent of misfit between M, and a pure DC, ?, which show that the CLVD contribution was dominated. It seems there is a good agreement with geology phenomenon, such as active anticline, active salt domes, fault links, fault tips, and also might be curved fault surface in the region as the local effect where the CLVD is dominant.