Fig. 3From: Altitude effects of localized source currents on magnetotelluric responsesMT responses at a period of 20 s: (left) relationship between the apparent resistivity and the horizontal distance of source current. (right) Relationship between the phase and the horizontal distance of source current. The black/blue/light blue/green/red circles denote the responses derived from the altitude of 100/150/200/500/1000 km, respectivelyBack to article page