Abstract
To know the crustal structure, composition, deformation, and evolution, it is crucial to appreciate the ratio between the velocity of the primary wave and the velocity of the secondary wave, Poisson's ratio, and crustal thickness. The receiver function inversion method was used to determine the (h), the primary wave and velocity of the secondary wave, and the Poisson's ratio. The chosen earthquakes' receiver functions were examined after being recorded at the two seismic stations in Anbar ANB1 and Karbala KAR2. According to the research, the westernmost part of the Mesopotamian plain has a crustal thickness between 44 and 46 km. The calculated crustal thickness value agrees with data from platform regions. The study area's crustal primary wave and velocity of the secondary wave is 1.79. For the platform region and andesitic rocks, this value is typical. The crustal Poisson's ratio was reported to have an intermediate value (0.27). It demonstrates that there are not many differences between the felsic and mafic compositions of the crust.
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