Variation Of Geomagnetic Disturbances (Ap) &  Plasma Electric Field (V.b) With Sun–Spot Number  (Rz) During Stream Time For Solar Cycle 22 & 23.

S.G. Singh; Sangeet Tiwari; Kamlesh Prasad Jaiswal

Volume : I, Issue : XII, September - 2012

Variation Of Geomagnetic Disturbances (Ap) & Plasma Electric Field (V.b) With Sun–Spot Number (Rz) During Stream Time For Solar Cycle 22 & 23.

S. G. Singh, Sangeet Tiwari, Kamlesh Prasad Jaiswal

Abstract :

The present study deals with the associations of geomagnetic disturbances (Ap), Plasma electric field (V.B) with sunspot number (Rz) during stream time for a long time period. It is found that the plasma electric field (V.B) & geomagnetic disturbance index (Ap) vary with 11–year sunspot cycle except at some circumstances. The variation of Ap & V.B. index for solar cycle 22 & 23 show close correspondences with 11–year sunspot cycle. The values of V.B. are higher during solar cycles 22 & 23. Association of Ap with sunspot number for solar cycle 23 shows interesting results. During the minimum phase of solar cycle, Ap indices are higher & show controversial results measured for previous solar cycles.