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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