Fractal analysis of major faults in India on a regional scale |
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| Authors: | P Sengupta S K Nath K K S Thingbaijam S Mistri |
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| Institution: | (1) Geological Survey of India, 27, Jawaharlal Nehru Road, Kolkata, 700016, India |
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| Abstract: | The seismicity of a region is implicit of the causal faulting mechanisms and geodynamic diversity of the subsurface regime
nucleating earthquakes of different magnitudes, several of which may be as devastating as ones historically reported in global
perspective of tectonic complexity as in the case of India. Fractal analysis using box-counting method for the major fault
networks across the country estimates fractal dimension, Df, values to be varying between 0.88 and 1.36. The fault segments in parts of northwest Himalayas, northeast India and Indo-Gangetic
plains, are observed to be associated with higher Df values implicating high seismicity rates. On the other hand, low Df values in the peninsular India indicate isolated pattern of the underlying faults. The fractal dimension is observed to be
indicative of predominant faulting types — higher values conforming to thrust faulting mechanism while lower to strike slip
tectonism. |
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