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Probabilistic Seismic Hazard Analysis Of Dehradun City , Uttrakhand

Journal: International Journal of Computational Engineering Research(IJCER) (Vol.6, No. 4)

Publication Date:

Authors : ; ;

Page : 23-32

Keywords : seismic source zones; active faults; attenuation relationship; recurrence of earthquakes; seismic hazard; fault length; uncertainties;

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Abstract

Dehradun is very old city and also rapidly growing urban area located in valley at foothills of Garhwal Himalayas. Dehradun city and adjoining region in western Himalayas is a is a very active seismic region of Himalayan belt , stretching from Pamir - Hindukush to Arkans in Burma.According to seismic zoning map of India , Dehradun city lies in Zone 4 and expected MSK intensity 8 .Dehradun city is located in the vicinity of twenty four independent seismic source zones which in reality are active faults. This creates uncertainties in size , location and the rate of recurrence of earthquakes. Probabilistic seismic hazard analysis provides a framework in which these uncertainties can be identified , quantified and combined in a rational manner to provide a more complete picture of the seismic hazard . This study presents a PSHA of the Dehradun city using the attenuation relationship given by Cornell et al (1979) in order to determinate various levels of earthquake-caused ground motion that will be exceeded in a given future time period.

Last modified: 2016-09-17 17:25:52