Abstract

The Shillong Plateau is a detached North-eastern portion of the Indian plate and is part of the Eastern Himalayan Syntaxial zone. It is one of the most seismically active plateaus in the world and falls under zone V of the Indian seismic hazard zonation map, the highest seismic hazard zone. During the period of study (2013-2017) numerous local earthquakes of varied magnitude were recorded by the installed broadband seismic stations.

Highlights

  • The Gutenberg-Richter relation describes the relationship between the frequencies of occurrence of earthquakes with increasing magnitudes

  • The seismicity of the Shillong Plateau is influenced by the tectonic driving forces from the Himalayan Arc to the north and the Burmese Arc to the east [10,25]

  • About 1.53.5 mm/yr. of the present-day N-S convergence in the Eastern Himalaya is accommodated in Shillong Plateau [26]

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Summary

Introduction

The Gutenberg-Richter relation describes the relationship between the frequencies of occurrence of earthquakes with increasing magnitudes. Shillong Plateau, Gutenberg-Richter relation, b value, Maximum likelihood method The ‘b value’ varies on the strength and composition of the material constituting the rock mass, stress orientations, and physical properties of the layers at different depth range.

Results
Conclusion

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