Fig. 3From: Probing Earth’s conductivity structure beneath oceans by scalar geomagnetic data: autonomous surface vehicle solutionDifference between scalar magnetic responses for the two 1-D sections GLO and PHS at two periods—1300 (top) and 10,000 (bottom) s. Left and right plots show the magnitude of the real and imaginary part of the corresponding difference, respectively. Note that different scales are used for the plotsBack to article page