Identification of active seismicity by fractal analysis for understanding the recent geodynamics of Central Himalaya |
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Authors: | P N S Roy S K Mondal |
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Institution: | 1.Department of Applied Geophysics,Indian School of Mines,Dhanbad,India |
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Abstract: | Seismicity along the Himalayan front is mostly attributed to the processes of collision between the Indian and the Eurasian
plates resulting in the under-thrusting of the Indian Peninsula underneath the Himalaya. The dynamics of the region bears
very complex components which require in-depth understanding. Here the overall rate of crustal shortening since ∼ 11 Ma is
∼ 21mm/yr, which is comparable to modern rate of under-thrusting of the northern Indian plate beneath the Himalaya. The region
experienced a large number of great earthquakes for the last 100–120 years causing massive destruction. Here an attempt has
been made to understand the seismicity pattern of the region using fractal correlation dimension and hence used for the detection
of active seismicity. Some clusters of seismicity were found to be indicative of seismically very active zones. Such clusters
may enlighten the understanding of recent complex dynamics of Himalayan zone. |
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