Geomagnetic variation anomalies in peninsular India

Thaku, N. K. ; Mahashabde, M. V. ; Arora, B. R. ; Singh, B. P. ; Srivastava, B. J. ; Prasad, S. N. (1986) Geomagnetic variation anomalies in peninsular India Geophysical Journal of the Royal Astronomical Society, 86 (3). pp. 839-854. ISSN 0016-8009

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Geomagnetic substorms recorded by an array of magnetometers over peninsular India have been analysed to investigate the subsurface electric configuration of the area. the study considered only night-time events when the external inducing field is uniform over the Indian peninsula and the conventional interpretational techniques of geomagnetic deep sounding can be readily applied. Contour maps of Fourier transform amplitudes and phases along with real and quadrature Parkinson arrows are presented. Their features reveal a complex anomaly pattern. the observed anomalies can be classified into: (i) southern peninsular anomalies, (ii) Palk Strait anomalies, (iii) Pondicherry rift anomalies, and (iv) anomalies in the central region. A large-scale induction process seems to be disturbed by localized perturbations. the prominent anomaly observed over the southern tip seems to have a direct relevance to the tectonic setting of the Indian ocean and adjoining areas.

Item Type:Article
Source:Copyright of this article belongs to Royal Astronomical Society.
Keywords:Magnetometer Array Study; Geomagnetic Anomalies in Peninsular India; Palk-strait; Coast Effect
ID Code:956
Deposited On:25 Sep 2010 04:34
Last Modified:12 May 2011 08:28

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