On the seismicity and tectonic activity Of the Bengal basin

Authors

  • V. P. SINGH
  • D. SHANKER

DOI:

https://doi.org/10.54302/mausam.v43i4.3504

Keywords:

Seismicity, Tectonic, Bouguer anomaly, Teleseismic

Abstract

The tectonic activity of the Bengal basin for years 1850-1988 of seismicity and 16 years (1970-1985) of P-wave first motion data have been studied. The seismicity studies reveal three seismic belts such as Dhubri fault (striking N-S), Calcutta hinge zone (striking NE-SW) and the central region of the Bengal basin (striking NW-SE). Dauki fault is comparatively less seismically active than Dhubri fault. The seismicity of Dhubri fault and Calcutta hinge zone are confined to limited extension. The seismic activity along the central portion of the Bengal basin is extending from the Himalayan region (27°N, 88.5°E) to eastern plate margin (23.8°N,  92°E). .This appears to be a tectonic belt and is associated with the northeast drifting of Indian plate. The focal, mechanism studies reveal thrust faulting showing the stresses to be perpendicular to the proposed belt.

 

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Published

01-10-1992

How to Cite

[1]
V. P. . SINGH and D. . SHANKER, “On the seismicity and tectonic activity Of the Bengal basin”, MAUSAM, vol. 43, no. 4, pp. 371–378, Oct. 1992.

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Shorter Contribution

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