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Spatial variation of probabilistic seismic hazard for Mumbai and surrounding region

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Title Spatial variation of probabilistic seismic hazard for Mumbai and surrounding region
 
Creator DESAI, SS
CHOUDHURY, D
 
Subject Mumbai region
Probabilistic seismic hazard analysis
Peak ground acceleration
Spectral acceleration
Uniform hazard response spectrum
Deaggregation
PENINSULAR INDIA
SPECTRAL ACCELERATION
EARTHQUAKE MAGNITUDE
SOUTH-INDIA
CITY
PARAMETERS
BANGALORE
MAXIMUM
LENGTH
 
Description Mumbai city, the economical capital of India, is located on the west coast of stable intra-plate continental region of Peninsular India which has an experience of significant historical earthquakes in the past. The city stood as the fourth most populous city in the world. Recent seismo-tectonic studies of this city highlighted the presence of active West coast fault and Chiplun fault beneath the Deccan basalt. In the present study, spatial variability of probabilistic seismic hazard for Mumbai region (latitudes of 18.85-19.35A degrees N and longitudes of 72.80-73.15A degrees E at a grid spacing of 0.05A degrees) which includes Mumbai city, Suburban, part of Thane district and Navi Mumbai, in terms of ground motion parameters; peak horizontal acceleration and spectral acceleration at 1.0-s period for 2 and 10 % probability of exceedance in 50 years are generated. The epistemic uncertainty in hazard estimation is accounted by employing seven different ground motion prediction equations developed for worldwide shallow crustal intra-plate environments. Further, the seismic hazard results are deaggregated for Mumbai (latitude 18.94A degrees N, longitude 72.84A degrees E) to understand the relative contributions of earthquake sources in terms of magnitude and distance. The generated hazard maps are compared with the zoning specified by Indian seismic code (IS1893: Part 1 in Indian standard criteria for earthquake-resistant design of structures, Part 1-General provisions and buildings. Bureau of Indian Standards, New Delhi, India, 2002) for rocky site. Present results show an underestimation of potential seismic hazard in the entire study region by non-probabilistic zoning prescribed by IS1893: Part 1 with significantly higher seismic hazard values in the southern part of Navi Mumbai.
 
Publisher SPRINGER
 
Date 2014-12-28T14:34:50Z
2014-12-28T14:34:50Z
2014
 
Type Article
 
Identifier NATURAL HAZARDS, 71(3)1873-1898
0921-030X
1573-0840
http://dx.doi.org/10.1007/s11069-013-0984-4
http://dspace.library.iitb.ac.in/jspui/handle/100/16766
 
Language English