Aftershock activity and interpretation of Båth law for 2001 Bhuj aftershock sequence : Implication of January 26, 2001 mainshock of Mw 7.7 over Kachchh region of West India

Dr. Parul C. Trivedi

Volume : IV, Issue : VI, June - 2015

Aftershock activity and interpretation of Båth law for 2001 Bhuj aftershock sequence : Implication of January 26, 2001 mainshock of Mw 7.7 over Kachchh region of West India

Dr. Parul C. Trivedi

Abstract :

Earthquakes are more deadly than any other natural disaster events. Each earthquake generates aftershock as a result of stress transfer mechanism and studies of aftershocks provide important insight into earthquake processes over the region. Kachchh region of western India has become seismically very active after 2001 Bhuj earthquake. In present study, B�th law is applied to 2001 Bhuj earthquake following a ief review of scaling laws. Catalogue data of India Meteorological Department (IMD) and Institute of Seismological Research (ISR) are extensively used for the period from January 26, 2001 to March 31, 2015. Magnitude difference Δm between mainshock and largest aftershock is found to be 2.0, 0.4 and 1.0 for 2001 Bhuj mainshock of M ~ 7.7, 2006 Gedi fault event of M ~ 5.2 and 2011 Talala seismic events of M ~ 5.2 respectively. Due to geophysical parameters and local geology of Kachchh, Δm for Kachchh aftershock sequence differs from the value suggested by B�th.