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Table 5 Bay disturbances with largest values of H-component geomagnetic field reported from KAK and maximum GICs associated with them between February 2017 and August 2020

From: Measurement of geomagnetically induced current (GIC) around Tokyo, Japan

Order Date & time (UT) Type Max. H (nT) GIC (A)
SFJ STB SFS
1 2017/12/05 13:16 bp 57 1.20 1.86 NA
2 2018/08/26 15:48 bp 52 0.36 2.18 NA
3 2017/03/01 12:49 bp 49 1.14 1.21 NA
4 2017/02/01 14:49 bp 43 NA NA NA
5 2017/04/22 09:20 bp 39 NA 2.01 NA
6 2018/10/01 14:00 bp 39 1.45 1.14 − 12.15
7 2017/07/22 08:06 b − 38 − 1.69 − 0.77 NA
8 2017/07/17 14:39 bp 36 − 0.98 1.22 NA
9 2017/10/11 14:51 bp 36 NA − 3.09 NA
10 2017/07/09 09:36 bp − 34 − 1.69 − 1.06 NA
  2018/06/23 09:42 b − 34 − 1.30 − 0.90 NA
  1. b: bay; bp: positive bay; NA: Not Available