Induction anomalies in geomagnetic Sq in peninsular India

Induction anomalies in geomagnetic Sq in peninsular India

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 structu...

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Veröffentlicht in:Geophysical research letters 1982-10, Vol.9 (10), p.1135-1138
Hauptverfasser: Srivastava, B. J., Prasad, S. N., Singh, B. P., Arora, B. R., Thakur, N. K., Mahashabde, M. V.
Format: Artikel
Sprache:eng
Schlagworte:
Anomalies
Arrays
Geomagnetism
Geophysics
Ground-based observation
India
Magnetometers
Signatures
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Zusammenfassung: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.
ISSN:0094-8276
1944-8007
DOI:10.1029/GL009i010p01135