Seismic hazard analysis of India using areal sources |
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| Institution: | 1. Earth Observatory of Singapore, Nanyang Technological University, Singapore;2. Department of Geosciences, National Taiwan University, Taiwan;3. Department of Geology, University of Yangon, Yangon, Myanmar;4. Gemological Institute of Myanmar, Yangon, Myanmar;5. Department of Civil Engineering, Sagaing Technological University, Myanmar;6. Department of Geology, Taungoo Univeristy, Taungoo, Myanmar;7. Department of Geology, Pathein University, Pathein, Myanmar;8. Department of Engineering Geology, Yangon Technological University, Myanmar;9. Department of Geology, Hinthada University, Hinthada, Myanmar;10. Department of Meteorology and Hydrology, Nay Pyi Taw, Myanmar;11. National Centre for Seismology, New Delhi, India |
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| Abstract: | In view of the major advancement made in understanding the seismicity and seismotectonics of the Indian region in recent times, an updated probabilistic seismic hazard map of India covering 6–38°N and 68–98°E is prepared. This paper presents the results of probabilistic seismic hazard analysis of India done using regional seismic source zones and four well recognized attenuation relations considering varied tectonic provinces in the region. The study area was divided into small grids of size 0.1° × 0.1°. Peak Horizontal Acceleration (PHA) and spectral accelerations for periods 0.1 s and 1 s have been estimated and contour maps showing the spatial variation of the same are presented in the paper. The present study shows that the seismic hazard is moderate in peninsular shield, but the hazard in most parts of North and Northeast India is high. |
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