Obtaining an Empirical Earthquakes Duration Magnitude Formula from the Data of the Iraqi Meteorological Organization and seismology (IMOS)

Zainab Hussain Mahmmoud; Ali M. Al-Rahim

doi:10.24996/ijs.2023.64.8.24

Authors

Zainab Hussain Mahmmoud Department of Geology, College of Science, University of Baghdad, Baghdad, Iraq https://orcid.org/0000-0003-2573-3545
Ali M. Al-Rahim Department of Geology, College of Science, University of Baghdad, Baghdad, Iraq

DOI:

https://doi.org/10.24996/ijs.2023.64.8.24

Keywords:

Duration Magnitude, linear regression analysis, IMOS, Station correction, Coda-duration

Abstract

This paper calculated the Duration Magnitude (MD) equation using data from the Iraqi Meteorological Organization and seismology (IMOS). It is an empirically determined equation and expressed as:

The epicentral distance and local geological conditions affect the duration of the coda. The data is obtained from 7 seismic stations in the network. The new proposed duration magnitude equation results from applying linear regression analysis to the data of a seismic signal duration with correlation coefficient R²=0.76; and a standard deviation value of 0.049. Station corrections indicated by Sc are also specified for the seismic stations that range from -0.024 to + 0.02.