Deterministic
Seismic Hazard Analysis of Bharuch City and Surrounding Region
Patel M., Solanki C. and Thaker T.
Disaster Advances; Vol. 15(7); 27-33;
doi: https://doi.org/10.25303/1507da027033; (2022)
Abstract
The research of seismic hazards along with their preparedness is critical for the
development of structures which are both safe and economically effective. Ankleshwar,
also known as the "Chemical Capital of India," is located in Bharuch district situated
on Gujarat's south-west coast and it is categorised as seismic zone III by the Indian
seismic zonation system. Past earthquake data and accessible seismotectonic information
were used to conduct a deterministic seismic hazard study of the Bharuch region.
After processing earthquake data obtained from 1819 to 2019, a separate seismic
catalogue encompassing a 400-kilometer radius around Bharuch city was created.
To get rid of the dependent events, the complete catalogue was declustered. Using
basic mathematical procedures, the minimum distances from every seismic source generating
tectonic activity were estimated. Predictive correlations for the region were used
to estimate the Peak Ground Acceleration (PGA) values at bedrock level. The present
analysis shows that with a maximum probable earthquake of magnitude 5.8 triggered
by the Narmada Son Fault (NSF), the values of PGA of Bharuch region have ranged
from 0.086 to 0.51 g. The key design parameters for the Bharuch city and surrounding
region are provided by the PGA model discussed in this study.
