Rastogi, R.G.; Janardhan, P.; Ahmed, K.; Das, A.C.; Bisoi, Susanta K.
(2010)
This paper describes the occurrence of a pair of oppositely directed sudden impulses (SI) in the geomagnetic field (ΔX) at ground stations, called SI+ − SI− pairs, that occurred between 1835 UT and 2300 UT on 23 April 1998. ...