CodaQback

Abstract

Attenuation study of a province is considered as a basic quantity for seismic hazard assessment. It has already been established that the study of two physical processes, namely the seismic sources and propagation of the waves, is essential for seismic-hazard mapping. Additionally, attenuation plays an important role towards scaling seismic hazard. Accordingly, a computational tool entitled CodaQback is presented. Based on back scattering model, this versatile software is equipped with user-friendly graphical user interface. It also allows quick picking of phases for computing coda attenuation parameter. All outputs after each execution step in CodaQback are efficiently exported step-wise into a separate folder in Excel and text formats. To validate the computing tool, it is tested in real data analysis and there is found to be good matching of computed values with already established ones. It is envisioned that this package will enable user to derive quick and reliable estimation of coda attenuation parameter irrespective of geological and geo-morphological units.

A brief review of the recent Assam Earthquake

“…This poses as a major threat for seismic amplification. [3][4][5][6][7][8] Apart from this, resonance frequency estimates come in the range of 0.5 to 2.8 Hz which is further accompanied by larger amplification values in certain pockets. 10 All these increase vulnerabilities of major chunk of Tezpur and its surrounding region towards seismic risk.…”

“…It is pertinent to mention here that Indian tectonic plate is continuously wedging into the Eurasian plates at a speed of 44 mm/year which is a large contributor of strain build-up. [2][3][4][5][6][7][8][9][10]…”