From: Extremely large flares/multiple large flares expected from sunspot groups with large area
No. | Date | Maximum sunspot area (MSH) | Expected maximum SXR flare class | Region number | Observed maximum SXR flare (number of X-class flares) |
---|---|---|---|---|---|
1 | 1947/04/08 | 6132 | X106.3 | 14,886 | NA |
2 | 1946/02/07 | 5202 | X83.1 | 14,417 | NA |
3 | 1951/05/19 | 4865 | X75.1 | 16,763 | NA |
4 | 1989/03/16 | 4823 | X74.1 | 5395 | X15 (11) |
5 | 1946/07/29 | 4720 | X71.8 | 14,585 | NA |
6 | 1947/03/12 | 4554 | X68.0 | 14,851 | NA |
7 | 2014/10/25 | 4534 | X67.6 | 12,192 | X2.0 (4) |
8 | 1989/06/16 | 3753 | X50.9 | 5528 | M9.3 (0) |
9 | 1938/01/21 | 3627 | X48.4 | 12,673 | NA |
10 | 1926/01/20 | 3619 | X48.2 | 9861 | NA |
11 | 2003/10/29 | 3486 | X45.6 | 10,486 | X28 (7) |
12 | 1917/02/13 | 3467 | X45.2 | 7977 | NA |
13 | 2001/03/30 | 3447 | X44.8 | 9393 | X20 (3) |
14 | 1991/10/27 | 3428 | X44.4 | 6891 | X6.1 (5) |
15 | 1937/10/05 | 3340 | X42.7 | 12,553 | NA |
16 | 1905/02/02 | 3339 | X42.7 | 5441 | NA |
17 | 1937/07/28 | 3303 | X42.0 | 12,455 | NA |
18 | 1991/03/23 | 3233 | X40.7 | 6555 | X9.4 (7) |
19 | 1988/07/01 | 3217 | X40.4 | 5060 | M9.2 (0) |
20 | 1968/02/01 | 3202 | X40.1 | 21,482 | NA |
21 | 1990/11/20 | 3179 | X39.7 | 6368 | M7.5 (0) |
22 | 1917/08/09 | 3178 | X39.7 | 8181 | NA |
23 | 1989/09/04 | 3098 | X38.2 | 5669 | X1.3 (3) |
24 | 2000/09/23 | 3096 | X38.1 | 9169 | X1.2 (1) |
25 | 1982/06/15 | 3039 | X37.1 | 3776 | X3.6 (5) |
26 | 1892/02/10 | 3038 | X37.1 | 2421 | NA |
27 | 1938/10/12 | 3003 | X36.4 | 13,024 | NA |