| Date | Measured solar flux 2.8 GHz |
Sunspot number | Planetary A index | K indices (3-hour intervals) |
Solar wind speed range (km/s) (SOHO) |
Number of flares |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Magnetic (SDO) |
NOAA | STAR ap avg |
Pots- dam WDC |
Daily ap range |
Planetary (WDC) |
Boulder | Andenes | C | M | X | ||||
| 2K | 1K | |||||||||||||
| 20210228 | 77.7 | 16 | 13 | 13 | 4.9 | 5 | 0-12 | 02001123 | 02201222 | 01101123 | 346-364 | 1 | ||
| 20210227 | 79.2 | 30 | 15 | 14 | 3.8 | 4 | 2-6 | 12111101 | 01312211 | 32001112 | 349-489 | 1 | ||
| 20210226 | 80.1 | 39 | 16 | 17 | 9.4 | 9 | 4-15 | 32122232 | 33132332 | 52122236 | 378-455 | |||
| 20210225 | 80.1 | 60 | 35 | 31 | 13.9 | 14 | 4-27 | 44321333 | 53332222 | 44332355 | 443-480 | |||
| 20210224 | 80.5 | 90 | 57 | 33 | 19.3 | 19 | 7-32 | 33432444 | 22332432 | 54443565 | 443-625 | |||
| 20210223 | 78.1 | 76 | 58 | 31 | 11.8 | 12 | 4-22 | 43323221 | 33342221 | 64334234 | 445-581 | |||
| 20210222 | 75.9 | 73 | 47 | 26 | 17.1 | 17 | 9-27 | 44233243 | 34323223 | 54343255 | 547-605 | |||
| 20210221 | 75.3 | 49 | 24 | 11 | 19.9 | 20 | 7-27 | 44444223 | 33554213 | 54434426 | 547-605 | |||
| 20210220 | 76.4 | 55 | 24 | 12 | 21.3 | 21 | 12-32 | 33433444 | 33433443 | 43434466 | 457-683 | |||
| 20210219 | 72.9 | 41 | 24 | 12 | 15.1 | 15 | 5-27 | 21124444 | 21234334 | 32114456 | 346-563 | |||
| 20210218 | 71.1 | 24 | 22 | 12 | 3.6 | 4 | 0-7 | 22111001 | 11212110 | 33011013 | 347-404 | |||
| 20210217 | 72.4 | 16 | 13 | 0 | 6.8 | 7 | 5-9 | 12212222 | 23323211 | 21211245 | 362-468 | |||
| 20210216 | 70.7 | 11 | 11 | 0 | 12.4 | 12 | 4-27 | 13442311 | 14452311 | 43333322 | 341-476 | |||
| 20210215 | 69.6 | 24 | 0 | 0 | 4.3 | 4 | 0-12 | 00111123 | 00211222 | 00001145 | 329-369 | |||
| 20210214 | 71.4 | 12 | 11 | 0 | 3.5 | 4 | 0-7 | 12211100 | 11212210 | 33211000 | 338-468 | |||
| 20210213 | 71.3 | 26 | 11 | 0 | 12.5 | 12 | 3-32 | 33243112 | 23242112 | 43233225 | 355-559 | |||
| 20210212 | 72.1 | 47 | 0 | 0 | 4.8 | 5 | 0-12 | 00001223 | 00001322 | 00000345 | 315-359 | |||
| 20210211 | 72.0 | 0 | 0 | 0 | 1.6 | 2 | 0-4 | 00110100 | 01121210 | 00000000 | 327-356 | |||
| 20210210 | 73.7 | 25 | 22 | 0 | 2.1 | 2 | 0-4 | 00111100 | 00012210 | 00110000 | 327-439 | |||
| 20210209 | 73.6# | 45 | 11 | 0 | 3.3 | 3 | 0-7 | 11211000 | 11231211 | 20111000 | 361-531 | |||
| 20210208 | 73.6 | 13 | 11 | 0 | 5.8 | 6 | 2-15 | 01111123 | 12231212 | 11011235 | 381-548 | |||
| 20210207 | 73.2 | 0 | 0 | 0 | 18.4 | 18 | 6-39 | 45443221 | 44453211 | 65433224 | 487-573 | |||
| 20210206 | 72.5 | 11 | 11 | 0 | 6.6 | 7 | 0-18 | 10001332 | 00001332 | 30001553 | 346-542 | |||
| 20210205 | 72.8 | 22 | 22 | 0 | 5.3 | 5 | 3-12 | 32121111 | 21222201 | 42021134 | 350-492 | |||
| 20210204 | 73.9 | 0 | 0 | 0 | 6.8 | 7 | 0-15 | 23222001 | 23323111 | 54221114 | 443-580 | |||
| 20210203 | 74.3 | 12 | 0 | 11 | 11.8 | 12 | 3-27 | 23221343 | 33221232 | 44221354 | 479-601 | |||
| 20210202 | 72.9 | 59 | 23 | 12 | 16.0 | 16 | 3-27 | 44434212 | 33333321 | 55425223 | 350-593 | |||
| 20210201 | 73.7 | 28 | 13 | 0 | 4.5 | 4 | 0-7 | 22001212 | 12002322 | 20000344 | 307-362 | |||
| Average | 74.3 | 32.3 | 17.6 | 8.4 | 9.50 | 9.50 | ||||||||
| International sunspot number (SILSO-WDC): 8.3 | ||||||||||||||
| K factor | 0.26 | 0.47 | 0.99 | |||||||||||
This page is normally updated once a day by Jan Alvestad. Solar wind speed is preliminary (* on days with too few measurements from SOHO-CELIAS/MTOF PM, measurements from DSCOVR are used). Ap and Kp values in red are based on the definitive Potsdam WDC data. Flare enhanced and erroneous solar flux measurements are replaced by other same day measurements (QC). Solar flux measurements that may be invalid are temporarily marked **, while interpolated values are marked #