Open Access
Table 2.
Ten largest flares measured by STIX in the thermal energy range (4−10 keV) up to July 2024.
| Date | STIX flux at 1 AU | GOES estimate |
|---|---|---|
| [UTC] | [counts/s/keV/cm2] | |
| 2024-05-20 | 594′571 | X16.5 ± 1.8 |
| 05:14 | ||
| 2024-05-14 | 343′911 | X11.1 ± 1.2 |
| 16:47 | ||
| 2024-05-15 | 286′764 | X9.7 ± 1.1 |
| 08:18 | ||
| 2024-07-22 | 280′591 | X9.6 ± 1.1 |
| 23:55 | ||
| 2024-05-15 | 276′655 | X9.5 ± 1.0 |
| 20:37 | ||
| 2023-07-17 | 264′387 | X9.2 ± 1.0 |
| 00:40 | ||
| 2024-07-27 | 230′552 | X8.3 ± 0.9 |
| 04:33 | ||
| 2024-05-17 | 222′133 | X8.1 ± 0.9 |
| 12:27 | ||
| 2024-02-22 | 157′433 | X6.3 ± 0.7 |
| 22:26 | ||
| 2023-07-16 | 129′854 | X5.5 ± 0.6 |
| 04:32 | ||
Notes. The flares are ordered by size. The GOES estimate is calculated using the fit shown in Fig. 7.
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