Analysis and Modelling of Seismic Surface Wave for Studying the Crustal Structure of the South-Eastern Region of Bangladesh

Abstract

Earthquake is one of the catastrophic events of the natural disasters that are prone to cause great damage to life and property. In order to decrease the damages, it is essential to gain knowledge for studying the crustal structure of the earth. In this dissertation crustal structure of the south-eastern region of Bangladesh is estimated by using seismic surface wave data. The parameters of the recorded earthquake data are ideally related to the subsurface geology. Geologic properties beneath a region have a major impact on the ground motion by modifying the amplitude, phase, duration, and shape of seismic waves. The main purpose of our work is to study the crustal structure, particularly major crustal boundaries and thicknesses of the structures. Three earthquake events of the south-eastern region of Bangladesh have been deliberated in this research. The events are respectively of magnitude 5.6 occurred on 26 July 2003 at the south-west of Daluchari, Chittagong, Bangladesh, magnitude 5.1 occurred on 27 July 2003 at Kolabunia, Chittagong, Bangladesh and magnitude 5.6 occurred on 21 September 2003 at the south of Meiktila, Myanmar nearer to the study area……………………………