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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 12, issue 7
Ann. Geophys., 12, 655–663, 1994
https://doi.org/10.1007/s00585-994-0655-6
© European Geosciences Union 1994
Ann. Geophys., 12, 655–663, 1994
https://doi.org/10.1007/s00585-994-0655-6
© European Geosciences Union 1994

  30 Jun 1994

30 Jun 1994

On Ps6 and longer period geomagnetic pulsations in the Indian equatorial region

D. R. K. Rao and R. L. Asinkar D. R. K. Rao and R. L. Asinkar

Abstract. Adopting an appropriate procedure suitable for processing the amplitude-time records based on the two-component spectral analysis technique, the statistical information on Ps6 and other longer periods are worked out on the geomagnetic field registrations in the Indian longitudinal regions at and away from the equatorial electrojet influence. The storm interval during 21 and 22 September 1982 has been chosen for the analysis, as violent and regular cyclic variations of the geomagnetic field were recorded in all the three components of the field at the Indian observatories. The procedure, when applied to two intervals of afternoon and night conditions of equatorial ionosphere, showed practically the same polarisation characteristics in the H-D plane at all the frequencies under the equatorial electrojet. At far away places from this influence, the ellipticities are found to be relatively to the west during the afternoon. These, along with the other results, are discussed.

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