Fig. 6
From: Measurement of geomagnetically induced current (GIC) around Tokyo, Japan
GIC at SFJ and STB associated with the 16 July 2017 SSC. The top panel shows the raw GIC data with 0.1-s sampling. The second- and third-row panels show the differences between data sampled every 0.1 s and the 1-s resampled data and the differences between the data sampled every 0.1 s and the 10-s resampled data, respectively. The bottom panels show the ratio of the maximum GIC of the resampled data for the given sample interval to that of the 0.1-s sampled data as a function of the sample intervals