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Induction anomalies in geomagnetic Sq in peninsular India
Author(s) -
Srivastava B. J.,
Prasad S. N.,
Singh B. P.,
Arora B. R.,
Thakur N. K.,
Mahashabde M. V.
Publication year - 1982
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl009i010p01135
Subject(s) - earth's magnetic field , geology , equatorial electrojet , batholith , geophysics , graben , magnetometer , ionosphere , electrojet , seismology , geodesy , magnetic field , physics , tectonics , quantum mechanics
Anomalies in geomagnetic Sq(H), Sq(Z) and Sq(D), as recorded at an array of 21 magnetometers and 5 permanent observatories in peninsular India during 1979‐1980, are analyzed and discussed in relation to geology. Signatures of the Kodaikanal batholith, the Dharwar series of rocks and a graben structure in the Palk Strait on the geomagnetic records of nearby stations are unmistakably identified and associated with internal induction effect. The extent and influence of the ionospheric equatorial electrojet and oceanic induced currents observed on the ground in this complex region are also mapped.