1868年以降に観測されたの大きな地磁気嵐
(aa指数による)
| rank | date (UT) | max. aa index (nT) |
| 1 | 1989/03/14 | 715 |
| 1989/03/15 | 715 | |
| 2003/10/29 | 715 | |
| 4 | 1958/07/08 | 698 |
| 1959/07/15 | 698 | |
| 1972/08/04 | 698 | |
| 7 | 1921/05/14 | 680 |
| 1921/05/15 | 680 | |
| 9 | 1872/02/04 | 658 |
| 1892/02/14 | 658 | |
| 1903/10/31 | 658 | |
| 1909/09/25 | 658 | |
| 13 | 1928/07/08 | 656 |
| 1938/01/22 | 656 | |
| 1938/01/25 | 656 | |
| 1938/04/16 | 656 | |
| 1941/03/01 | 656 | |
| 1946/03/28 | 656 | |
| 1946/09/22 | 656 |