Determination of directions of horizontal principal stress and identification of active faults in Kachchh (India) by electromagnetic radiation (EMR)
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- 作者：Jyotirmoy Mallik ; George Mathew ; Thomas Angerer ; Reinhard O. Greiling
- 关键词：Electromagnetic radiation ; Kachchh ; Bhuj ; Fault ; Stress ; Cerescope
- 刊名：Journal of Geodynamics
- 出版年：2008
- 出版时间：May 2008
- 年：2008
- 卷：45
- 期：4-5
- 页码：234-245
- 全文大小：1940 K
文摘
The Kachchh basin in the western India is known for its recent high seismicity. This study presents an application of the geogenic Electromagnetic Radiation (EMR) technique for deciphering the directions of principal horizontal stress in the eastern Kachchh. The principal direction of horizontal stress obtained from EMR differs from those obtained from earthquake focal plane solutions. The major horizontal principal stress based on the EMR study shows an azimuth of N60°E ± 10°. The principal directions of EMR emissions are parallel to the acute bisector of conjugate microcracks. The azimuthal distribution of EMR signal and dimension of microcracks suggest that the EM emissions are transversely polarized.