Table 1
The number of flares per GOES X-ray class and per solar cycle, before and after the removal of the 0.7 downscaling factor (“GOES old” and “GOES new”, respectively the upper and lower portion of the table). A 50% increase in the number of M-class and X-class events is obvious (respectively 55% and 52%). Solar cycles are from the 13-month smoothed monthly sunspot number minimum to the next minimum (Meeus, 1958), with the data from January to March 1976 added to SC21.
| SC21 | SC22 | SC23 | SC24 | Total | |
|---|---|---|---|---|---|
| GOES old | |||||
| A | 2 | 9 | 2 | 13 | |
| B | 2857 | 6128 | 8470 | 5403 | 22858 |
| C | 14487 | 12439 | 13162 | 7736 | 47824 |
| M | 2184 | 2020 | 1442 | 733 | 6379 |
| X | 168 | 152 | 126 | 49 | 495 |
| Total | 19696 | 20741 | 23209 | 13923 | 77569 |
| GOES new | |||||
| A | 1 | 4 | 5 | ||
| B | 2216 | 4713 | 6423 | 3888 | 17240 |
| C | 13776 | 12752 | 14322 | 8835 | 49685 |
| M | 3441 | 3043 | 2277 | 1124 | 9885 |
| X | 263 | 232 | 183 | 76 | 754 |
| Total | 19696 | 20741 | 23209 | 13923 | 77569 |
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