Figure 2From: Ionospheric current contribution to the main impulse of a negative sudden impulseGeosynchronous magnetic field response to the negative SI. (a) GOES-11, (b) GOES-12, and (c) GOES-10 satellites. Hp, He, Hn, and Ht represent the components of the geomagnetic field parallel to the satellite's spin axis, earthward, normal to Hp & He, and total field, respectively.Back to article page