The importance of Fourier Power Spectra for Velocity Recordings in Determining the Seismic Properties of Southwestern Syria and the Effects of Geological Structures on those Properties

Abstract

In this research we have studied the seismic characteristics in southwest Syria by analyzing the seismic records of earthquakes whose centers are located in the Dead Sea in the south and its extension in the north in the Lebanese Bekaa and the Palmyra chain in the north and east, and recorded in the monitoring stations belonging to the National Earthquake Monitoring Network, we analyzed the general shape For seismic recording, calculate Fourier power spectra for each record Then we determined the dominant periods in which the power is at its maximum value, after that we determined the wave phases recorded, and calculated their observed velocities, and compare them with the results of the spectra analysis to determine the areas in which the power faded, and the results concluded that there is a big convergence in the areas of the periods In which the power is at its greatest value for the seismic sources surrounding the study area in addition to some indications of the presence of sedimentary basins, and the presence of multiple discontinuities in the recorded wave phases, and the dominant periods of each source were determined, the observed velocities of the phases PN-PG-SN-SG, and the results were linked Subsurface geology of the study area.