| Year | Date | Minimum Sym-H (nT) |
| 1981 | April 13 | −343 |
| 1982 | March 2 | −252 |
| July 14 | −436 | |
| June 6 | −256 | |
| 1986 | February 9 | −379 |
| 1989 | March 14 | −720 |
| September 19 | −292 | |
| October 21 | −337 | |
| November 17 | −332 | |
| 1990 | April 10 | −311 |
| 1991 | March 25 | −337 |
| October 29 | −284 | |
| November 9 | −402 | |
| 1992 | May 14 | −363 |
| 2000 | April 7 | −320 |
| July 15 | −347 | |
| 2001 | March 31 | −435 |
| April 11 | −280 | |
| November 6 | −320 | |
| 2003 | October 31 | −429 |
| November 20 | −490 | |
| 2004 | November 8 | −393 |
| 2005 | May 15 | -305 |