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Fractal study of seismicity in order to characterize the various tectonic blocks of North-east Himalaya, India

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  • P. Roy
  • Suparna Chowdhury
  • Partha Sarkar
  • Saroj Mondal

Abstract

North-eastern Himalaya is said to be one of the world most complex geological set-up with different kinds of seismotectonic systems. Region has experienced two of the world’s strongest earthquakes, such as Shillong earthquake of 1897 known as Assam earthquake and subsequent 1950 earthquake in Arunachal Pradesh, both of with magnitude of 8.7, and also several other strong earthquakes. Various techniques have been applied to understand the past strong earthquake mechanism as well as hazard estimation carried out for future earthquake. Fractal correlation dimension (D c ) is being used in this study with the seismicity for the period 1961 to recent for understanding the pattern of seismic hazard. The entire area has been divided into four major tectonic blocks, and each block event was divided into consecutive fifty events window for seeing spatiotemporal patterns. After comparing the patterns, we have identified that Block of Eastern Himalaya near Main Central Thrust, Main Boundary Thrust, north of Kopili lineament and Block of Shillong plateau near Dauki fault are having relatively intense clustering of events in recent times, which may be identified as the zones of most potential to have a strong event. Copyright Springer Science+Business Media Dordrecht 2015

Suggested Citation

  • P. Roy & Suparna Chowdhury & Partha Sarkar & Saroj Mondal, 2015. "Fractal study of seismicity in order to characterize the various tectonic blocks of North-east Himalaya, India," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 77(1), pages 5-18, May.
    • Handle: RePEc:spr:nathaz:v:77:y:2015:i:1:p:5-18
    DOI: 10.1007/s11069-014-1188-2
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    References listed on IDEAS

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    1. P. Roy & S. Mondal & Mallickarjun Joshi, 2012. "Seismic hazards assessment of Kumaun Himalaya and adjacent region," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 64(1), pages 283-297, October.
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    Cited by:

    1. Auchitya Kumar Pandey & P. N. S. Roy & P. R. Baidya & A. K. Gupta, 2018. "Estimation of current seismic hazard using Nakamura technique for the Northeast India," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 93(2), pages 1013-1027, September.

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