Fig. 13From: Geomagnetic and ionospheric response to the interplanetary shock on January 24, 2012Ionospheric and geomagnetic observations during January 24, 2012, at 1430–1530 UT (from top to bottom): altitude distribution of electron density N e variations measured by EISCAT; variations of N e at altitude z = 121 km; and magnetic field variations [X-component in (nT)] at TRO and riometer variations (in dB) at IVABack to article page