Fig. 6From: Estimation of geomagnetically induced currents based on the measurement data of a transformer in a Japanese power network and geoelectric field observationsOccurrence number of absolute values of difference of 1-hour values of horizontal component of Memanbetsu geomagnetic field data between 1958 and 2013 and the CCDF of the values equal to or greater than 10 nT/hour. The dashed lines in the right panel show 95 % confidence interval of the fitting (solid line)Back to article page