Fig. 3From: Measurement of geomagnetically induced current (GIC) around Tokyo, JapanLocations of GIC measurements of 500 kV lines. Squares show substations, where GIC measurements are performed, and diamonds show their neighbor substations. Solid lines show 500 kV lines between substations. The plus sign shows the location of the Kakioka Magnetic Observatory (KAK). The dashed lines show geomagnetic latitudes of 30º, 31º, 32º, and 33º, respectivelyBack to article page