Source Parameters and Focal Mechanisms of Local Earthquakes: Single Broadband Observatory at ISM Dhanbad

Authors

  • J. R. Kayal
     Department of Applied Geophysics, Indian School of Mines, Dhanbad - 826 004
  • V. K. Srivastava
     Department of Applied Geophysics, Indian School of Mines, Dhanbad - 826 004
  • S. N. Bhattacharya
     Department Geology and Geophysics, IIT Kharagpur, Kharagpur - 721 302
  • P. K. Khan
     Department of Applied Geophysics, Indian School of Mines, Dhanbad - 826 004
  • Rima Chatterjee
     Department of Applied Geophysics, Indian School of Mines, Dhanbad - 826 004

Keywords:

Earthquake, Broadband, Seismograph, Dhanbad.

Abstract

A three-component broadband seismograph is in operation since January 2007 at the Indian School of Mines (ISM) campus. We have used the broadband seismograms of two local earthquakes M <3 recorded by this single station to illustrate its efficacy in understanding the source processes and tectonics in Dhanbad area. Source parameters and fault plane solutions are obtained through waveform inversion. It is observed that these two earthquakes occurred in the lower crust at a depth of 26 km by strike slip faulting. North-south compressional and east-west tensional stresses are dominant in the area, and the lower crust is the source area for the local earthquakes.

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Issue

Volume 74, Issue 3, September 2009

Section

Articles

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Published

2009-09-01

How to Cite

Kayal, J. R., Srivastava, V. K., Bhattacharya, S. N., Khan, P. K., & Chatterjee, R. (2009). Source Parameters and Focal Mechanisms of Local Earthquakes: Single Broadband Observatory at ISM Dhanbad. Journal of Geological Society of India, 74(3), 413–419. Retrieved from http://www.geosocindia.com/index.php/jgsi/article/view/58868

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