Archaeomagnetic determination of the ancient intensity of the geomagnetic field in Tamilnadu,India |
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| Authors: | K Ramaswamy M Dheenathayalu S Bharathan |
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| Institution: | Department of Physics, Annamalai University, Annamalainagar, Pin: 608002, Tamilnadu India |
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| Abstract: | A detailed study of the ancient intensity of the Earth's magnetic field in Tamilnadu, India is presented using pottery, bricks, tiles etc., obtained from the excavations that have been carried out at some of the important places of historical and archaeological interest. An attempt is made to reconstruct the secular variation of the geomagnetic field intensity. The results reported here reveal considerable changes in the Earth's magnetic field in this region during the past 2400 y. It is observed that the intensity of the geomagnetic field has been previously 57% greater than at present. |
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