Share This Article:

Basement Configuration from Magnetotelluric Studies in Bhuj Earthquake Epicentral Zone, Gujarat, India

Full-Text HTML XML Download Download as PDF (Size:3874KB) PP. 177-188
DOI: 10.4236/ojer.2016.53015    811 Downloads   1,149 Views  

ABSTRACT

A wide band (1000 - 0.001 Hz) magnetotelluric study has been taken up in the Bhuj earthquake epicentral zone and 21 sites have been occupied along three profiles during March-April 2001 to understand the deep structure of the region. In addition the region surrounding Bhuj has been probed earlier with number of MT profiles and the subsurface structure is well constrained from hydrocarbon exploration point of view besides seismotectonic studies. In the present study, the results obtained along 130 km long profile from Mundra to Rapar oriented in NE-SW direction passing through the epicenter are presented considering these two databases. The subsurface structure has shown interesting correlation with the surface deformations, a new basement configuration and associated seismotectonics of the region. Our main result is relating the basement configuration and surface ruptures.

Cite this paper

Begum, S. and Harinarayana, T. (2016) Basement Configuration from Magnetotelluric Studies in Bhuj Earthquake Epicentral Zone, Gujarat, India. Open Journal of Earthquake Research, 5, 177-188. doi: 10.4236/ojer.2016.53015.

References

[1] Gupta, H.K., Harinaryana, T., Kousalya, M., Mishra, D.C., Mohan, I., Rao, N.P., Raju, P.S., Rastogi, B.K., Reddy, P.R. and Sarkar, D. (2001) Bhuj Earthquake of 26 January 2001. Journal of the Geological Society of India, 57, 275-278.
[2] Kareemunnisa Begum, S. (2003) Deep Geoelectric Structure in Chamoli and Bhuj Earthquake Epicentral Zones, India Using Magnetotelluric Studies. Ph.D. Thesis, Osmania University, 1-260.
[3] Sastry, R.S., Nagarajan, N. and Sarma, S.V.S. (2008) Electrical Imaging of Deep Crustal Features of Kutch, India. Geophysical Journal International, 172, 934-944. http://dx.doi.org/10.1111/j.1365-246X.2007.03658.x
[4] Naganjayneyulu, K., Ledo, J.J. and Queralt, P. (2010) Deep Crustal Electromagnetic Structure of Bhuj Earthquake Region (India) and Its Implications. Geologica Acta, 8, 83-97.
[5] Harinarayana, T., Sastry, R.S., Nagarajan, N., Prabhakar, S., Rao, E., Manoj, C., Naganjaneyulu, K., Murthy, D.N. and Sarma, S.V.S. (2000) Integrated Geophysical Studies for Hydrocarbon Exploration, Kutch, India. Magnetotellurics, NGRI Technical Report No. NGRI-2000-Exp-296.
[6] Swift, C.M. (1967) A Magnetotelluric Investigation of an Electrical Conductivity Anomaly in the South Western United States. Unpublished Ph.D. Thesis, Department of Geology and Geophysics, Massachusetts Institute of Technology, Cambridge.
[7] Groom, R.W. and Bailey, R.C. (1989) Analytical Investigations of the Effects of Near-Surface Three Dimensional Galvanic Scatterers on MT Tensor Decompositions. Geophysics, 56, 496-518. http://dx.doi.org/10.1190/1.1443066
[8] Bostick, F.X. (1977) A Simple and Almost Exact Method of MT Analysis (Abstract). Workshop on Electrical Methods in Geothermal Exploration, Snowbird, Utah.
[9] Marquardt, D.W. (1963) An Algorithm for Least-Square Estimation of Non-Linear Parameters. Journal of the Society for Industrial and Applied Mathematics, 11, 431-471.
http://dx.doi.org/10.1137/0111030
[10] Constable, S.C., Parker, R.L. and Constable, C.G. (1987) Occam Inversion: A Practical Algorithm for Generating Smooth Models from EM Sounding Data. Geophysics, 92, 289-300.
http://dx.doi.org/10.1190/1.1442303
[11] Kayal, J.R., De, R., Ram, S., Sriram, B.V. and Goankar, S. (2002) Aftershocks of the 26 January, 2001 Bhuj Earthquake in Western India and Its Seismotectonic Implications. Journal of the Geological Society of India, 59, 395-417.
[12] Unsworth, M.J., Malin, P.E., Egbert, G.D. and Booker, J.R. (1997) Internal Structure of the San Andreas Fault Zone at Parkfield, California. Geology, 25, 359-362. http://dx.doi.org/10.1130/0091-7613(1997)025<0359:ISOTSA>2.3.CO;2
[13] Unsworth, M.J., Egbert, G.D. and Booker, J.R. (1999) High Resolution Electromagnetic Imaging of the San Andreas Fault in Central California. Journal of Geophysical Research, 104, 1131-1150. http://dx.doi.org/10.1029/98JB01755
[14] Gupta, H.K., Sarma, S.V.S., Harinaryana, T. and Virupakshi, G. (1996) Fluids below the Hypocentral Region of Latur Earthquake, India: Geophysical Indicators. Geophysical Research Letters, 23, 1569-1572. http://dx.doi.org/10.1029/96GL01032
[15] Zhao, D., Kanamori, H. and Negishi, H. (1996) Tomography of the Source Area of the 1995 Kobe Earthquake: Evidence for Fluids at the Hypocentre? Science, 274, 1891-1894.
http://dx.doi.org/10.1126/science.274.5294.1891
[16] Karanth, R.V., Sohoni, P.S., Mathew, G. and Khadkikar, A.S. (2001) Geological Observations of the 26 January 2001 Bhuj Earthquake. Journal of the Geological Society of India, 58, 193-202.
[17] Sanker, R. and Pande, P. (2001) Geoseismological Studies of Kutch (Bhuj) Earthquake of 26 January 2001. Journal of the Geological Society of India, 58, 203-208.
[18] Singh R.P., Sahoo, A.K., Sanjeeb, B., Kumar, G.M. and Bhuiyan, C. (2001) Ground Deformation of the Gujarat Earthquake of 26 January 2001. Journal of the Geological Society of India, 58, 209-214.
[19] Paul, A. and Kamal (2001) Fault Propagation Pattern of the January 26, 2001 Gujarat Earthquake. International Conference on Seismic Hazard with Particular Reference to Bhuj Earthquake, New Delhi, 26 January 2001, 22.
[20] Sanker, R. (2001) Seismotectonics of Kutch Region and Isoseismals of Kutch (Bhuj) Earthquake of 26 January 2001. International Conference on Seismic Hazard with Particular Reference to Bhuj Earthquake, New Delhi, 26 January 2001, 29.
[21] Naik, S.D (2001) Land Deformation in Parts of Gujarat due to Earthquake of 26 January 2001. International Conference on Seismic Hazard with Particular Reference to Bhuj Earthquake, New Delhi, 26 January 2001, 76-77.
[22] Pande, P., Ghevaria, S.Y.P. and John, B. (2001) Coseismic ground Deformation and Liquefaction Induced by Kutch (Bhuj) Earthquake of 26 January 2001. International Conference on Seismic Hazard with Particular Reference to Bhuj Earthquake, New Delhi, 26 January 2001, 79-80.
[23] Seed, H.B. (1970) In: Wiegel, R.L., Ed., Earthquake Engineering, Prentice Hall Inc., Englewood Cliffs, 227-251.
[24] Mishra, D.C., Chandrasekhar, D.V. and Singh, B. (2001) Bhuj Earthquake of 26 January 2001 and Gravity Gradients/Trends. International Conference on Seismic Hazard with Particular Reference to Bhuj Earthquake, New Delhi, 26 January 2001, 81.
[25] Sarkar, I. and Chandra, R. (2001) On pore pressure changes due to soil liquefaction and undrained poroelastic effects during the 2001 Bhuj earthquake. International Conference on Seismic Hazard with Particular Reference to Bhuj Earthquake, New Delhi, 26 January 2001, 134-139.
[26] Kumar, A., Basu, S., Thakkur, S.K., Shrikhande, M., Agarwal, P., Das, J. and Paul, D.K. (2001) Strong Motion Records of Bhuj Earthquake. International Conference on Seismic Hazard with Particular Reference to Bhuj Earthquake, New Delhi, 26 January 2001, 144-146.
[27] Arora, B.R., Subba Rao, P.B.V., Rawat, G. and Singh, A.K. (2001) Singh, Deep Electrical Conductivity Distribution around the Bhuj Earthquake Affected Region. International Conference on Seismic Hazard with Particular Reference to Bhuj Earthquake, New Delhi, 26 January 2001, 230-231.

  
comments powered by Disqus

Copyright © 2017 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.