Year | Month | Day | dH (nT) | Notes (reference, etc.) |
---|---|---|---|---|
1938 | 4 | 16 | 117 | |
1946 | 7 | 26 | 114 | |
1947 | 7 | 17 | 116 | |
1958 | 7 | 8 | 116 | |
1959 | 7 | 11 | 112 | |
1960 | 4 | 30 | 124 | |
1960 | 11 | 13 | 220 | |
1982 | 7 | 13 | 114 | |
1991 | 3 | 24 | 202 | Araki (1997) |
1991 | 6 | 13 | 113 | |
1991 | 7 | 8 | 146 | |
1991 | 10 | 28 | 174 | |
1992 | 5 | 9 | 101 | |
2000 | 7 | 15 | 140 | |
2001 | 11 | 6 | 105 | |
2015 | 6 | 22 | 104 |