These results are from the paper: A. E. Yilmaz, J. M. Jin, and E. Michielssen, "Analysis of low-frequency electromagnetic transients by an extended time-domain adaptive integral method," IEEE Trans. Adv. Pack., vol. 30, no. 2, pp. 301-312, May 2007. The movies compare the current densities (in dB scale) on the structure due to common-mode and differential-mode excitation of the two center traces.