| Date | Measured solar flux |
Sunspot number | Planetary A index | K indices (3-hour intervals) | Min-max solar wind speed (km/sec) | Number of flares (events) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| STAR SDO | NOAA | STAR | NOAA | Daily ap range | Planetary | Boulder | C | M | X | |||
| 20111231 | 132.9 | 136 | 68 | 4.4 | 4 | 2-7 | 11120112 | 11121221 | 344-408 | 1 | 2 | |
| 20111230 | 141.1 | 129 | 89 | 5.3 | 5 | 0-12 | 11101322 | 11112322 | 334-473 | 12 | 1 | |
| 20111229 | 147.1 | 176 | 105 | 6.9 | 7 | 3-15 | 12331111 | 12342222 | 318-508 | 16 | 2 | |
| 20111228 | 144.8 | 189 | 122 | 2.8 | 3 | 0-6 | 00011211 | 10012321 | 275-329 | 13 | ||
| 20111227 | 140.3 | 180 | 126 | 0.6 | 1 | 0-3 | 00000001 | 00001221 | 271-344 | 10 | ||
| 20111226 | 145.6 | 201 | 123 | 0.5 | 0 | 0-2 | 00000000 | 00101220 | 271-404 | 4 | 2 | |
| 20111225 | 144.3 | 175 | 66 | 1.6 | 2 | 0-4 | 11100001 | 11101031 | 343-419 | 6 | 1 | |
| 20111224 | 142.8 | 142 | 90 | 0.9 | 1 | 0-3 | 00000001 | 00111221 | 339-384 | 4 | ||
| 20111223 | 138.2 | 150 | 123 | 1.0 | 1 | 0-3 | 11000000 | 11010211 | 348-439 | 7 | ||
| 20111222 | 145.8 | 214 | 105 | 2.5 | 2 | 0-6 | 21000011 | 21001212 | 357-446 | 7 | ||
| 20111221 | 144.5 | 197 | 93 | 4.5 | 4 | 0-9 | 11011222 | 12012222 | 334-424 | 16 | ||
| 20111220 | 137.4 | 241 | 128 | 4.5 | 4 | 3-7 | 21111121 | 21222222 | 332-401 | 7 | ||
| 20111219 | 128.2 | 215 | 133 | 5.8 | 6 | 2-12 | 11101232 | 12111232 | 284-436 | |||
| 20111218 | 127.4 | 212 | 103 | 1.8 | 2 | 0-5 | 00010011 | 10021012 | 270-313 | 2 | ||
| 20111217 | 119.6 | 176 | 95 | 0.5 | 0 | 0-4 | 00000001 | 00001100 | 269-277 | 3 | ||
| 20111216 | 121.0 | 171 | 60 | 0.5 | 0 | 0-2 | 00000000 | 00001100 | 270-361 | |||
| 20111215 | 124.2 | 127 | 44 | 1.1 | 1 | 0-3 | 00100000 | 01111111 | 336-373 | 2 | ||
| 20111214 | 132.0 | 119 | 65 | 2.1 | 2 | 0-4 | 11000011 | 12011211 | 360-437 | 16 | ||
| 20111213 | 133.1 | 138 | 77 | 4.1 | 4 | 2-6 | 10111000 | 12112122 | 448-497 | 5 | ||
| 20111212 | 131.5 | 91 | 57 | 4.1 | 4 | 0-9 | 10001221 | 10102222 | 449-583 | 2 | ||
| 20111211 | 134.3 | 160 | 103 | 4.8 | 5 | 0-9 | 10112221 | 11223221 | 363-593 | |||
| 20111210 | 140.0 | 181 | 90 | 8.1 | 8 | 4-15 | 21321223 | 22331123 | 350-532 | 3 | ||
| 20111209 | 143.5 | 212 | 116 | 3.0 | 3 | 0-6 | 00112101 | 00112211 | 274-373 | 1 | ||
| 20111208 | 144.8 | 249 | 142 | 2.4 | 2 | 0-4 | 11001111 | 11001111 | 276-332 | 2 | ||
| 20111207 | 148.9 | 282 | 122 | 1.4 | 1 | 0-3 | 00010101 | 00010111 | 270-332 | 3 | ||
| 20111206 | 151.1 | 249 | 143 | 1.3 | 1 | 0-5 | 00001100 | 00001110 | 270-356 | |||
| 20111205 | 158.1 | 266 | 185 | 2.1 | 2 | 0-4 | 00001101 | 11001211 | 336-386 | 8 | ||
| 20111204 | 163.6 | 299 | 154 | 4.4 | 4 | 0-9 | 21121100 | 20222201 | 370-480 | 4 | ||
| 20111203 | 164.1 | 278 | 138 | 8.8 | 9 | 3-12 | 10100131 | 10200222 | 347-466 | 7 | ||
| 20111202 | 157.3 | 251 | 106 | 4.3 | 4 | 0-12 | 10100131 | 10200222 | 347-466 | 6 | ||
| 20111201 | 152.2 | 223 | 89 | 7.1 | 7 | 4-15 | 32212211 | 32222221 | 449-544 | 4 | ||
This page is normally updated once a day by Jan Alvestad. All values are preliminary.