Fig. 8.


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Snapshots at 21:35 on 29 May 2005 (a) and at 22:51UT on 29 May 2005 (b) of calculated GIC at different sites of the Chinese Northwest 750 kV power grid. The solid circle represents that the GIC flow into the power network from ground, the hollow one means that GIC flow into the ground. The dashed line with an arrow represents the direction of electric field at that substation (a) calculated GIC results at 21:35UT 29 May 2005 and (b) calculated GIC results at 22:51UT 29 May 2005.

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