Unique Observations of a Geomagnetic SI^+ -- SI^- Pair: Solar Sources and Associated Solar Wind Fluctuations

R. G. Rastogi, P. Janardhan, K. Ahmed +2

The paper describes the occurrence of a pair of oppositely directed sudden impulses (SI), in the geomagnetic field ($\Delta$X), at ground stations, called SI${}^{+}$ -- SI${}^{-}$ pairs…