Solar and geomagnetic data

Date Solar flux density
2.8 GHz		 Sunspot number Planetary A index
(3)		 K indices
(3-hour intervals) (3)		 Solar wind
speed range
(km/s)
(SOHO)(2)		 Number
of flares
DRAO (4) Almaty (1)
(averages)		 STAR
(SDO) (6)		 NOAA
(5)		 STAR
ap avg		 Pots-
dam
WDC		 Daily
ap range		 Planetary
(WDC)		 Boulder
(5)		 Andenes
(Tromsų)		 C M X
Measured
(20h UT)		 (02-11 UT) 2K 1K
  1AU
20250121 225**     448 260 188 9.1 9 4-15 23221232 23122332 33421264 459-713 29 1  
20250120 230**     446 271 277 19.4 19 15-27 43334333 33325332 45423345 468-713 37    
20250119 233.9     392 256 143 15.1 15 5-22 12433334 12333333 12443356 434-536 32 1  
20250118 222.4     330 205 128 8.3 8 6-12 32222222 22323222 34222225 456-601 41 3  
20250117 226.8 218.9 211.8 290 181 149 21.6 22 15-27 44433344 33344333 55423446 399-646 42 9  
20250116 208.2 190.2 184.0 262 202 105 12.9 13 6-18 33222333 24023422 44311454 383-551 22    
20250115 173.5 171.7 166.1 221 129 102 15.6 16 6-22 34433332 33434322 45333333 418-529 24    
20250114 166.4 143.5 138.8 184 129 106 9.9 10 6-15 32212233 22222322 43322354 381-536 26    
20250113 159.7 143.0 138.3 185 121 100 9.5 10 4-27 42122222 32133322 63221344 381-489 19    
20250112 158.4 156.8 151.6 195 144 99 5.5 6 4-7 12212112 12321222 32102113 359-453 12    
20250111 156.0 165.9 160.5 228 150 82 6.5 6 3-15 21111321 21122321 41310323 389-490 10    
20250110 156.9 173.6 167.8 231 162 105 12.5 12 3-27 14233124 23334233 35323245 415-456 12    
20250109 162.2 175.3 169.6 267 189 126 8.0 8 4-18 21223321 12234322 32114423 349-420 18 1  
20250108 160.2 168.9 163.3 281 196 113 7.6 8 0-22 43201231 22201312 53201322 453-539 13    
20250107 167.7 177.2 171.4   146 113 11.4 11 7-15 23332322 12322322 44232435 463-671 12 1  
20250106 171.9 180.0 174.0   155 154 14.6 15 9-27 34332332 23334422 43423354 471-635 29 4  
20250105 180.0 226.2 218.8   188 178 18.3 18 9-32 32333443 23344543 54334765 539-700 23 5  
20250104 209.3 228.0 220.4   190 204 28.9 29 9-48 25543453 15564543 24542555 414-739 26 4 1
20250103 199.9 210.9 203.9   243 190 8.9 9 3-18 33332112 23311222 43300022 382-519 24 3 2
20250102 212.4 225.7 218.1 343 250 173 19.8 20 7-32 32444433 42354432 42333543 449-739 26 1  
20250101 219.2 223.1 215.7   220 149 83.5 84 32-207 45567874 35467754 45543965 401-685 33 4  
20241231 217.6 231.7 224.0   228 162 12.8 13 2-27 01211444 02222533 01010454 308-509 29 4  
20241230 223.5 259.6 251.0   173 183 5.9 6 2-9 02212122 02313222 01210033 308-410 31 17 2
20241229 254.7 282.2 272.9   208 209 4.1 4 2-6 10121111 10222322 30000001 341-410* 20 45 1
20241228 260.3 269.5 260.6   287 213 3.0 3 0-5 10110110 01112231 20000022 287-363* 43 3  
20241227 258.5 258.6 250.1   241 233 2.5 2 0-5 00001110 01002221 10000112 318-372 41 2  
20241226 255.8 251.4 243.1     211 1.3 1 0-2 00000000 00001111 00000002 355-466 26 2  
20241225 252.7 264.8 256.1     218 4.8 5 2-7 22221110 22122220 32310023 446-542 25 2  
20241224 258.5 240.5 232.6     219 9.1 9 3-18 23212223 23102323 34213345 457-649 33 9  
20241223 238.3 210.1 203.3     199 11.6 12 4-22 32212334 31213333 43102455 509-650 39 3  
20241222 223.3 197.8 191.4 308 219 176 12.3 12 5-18 12233333 21233433 22223343 572-719 33 3  

1) Calculated based on data obtained courtesy of the Institute of Ionosphere, Kazakhstan
 2) Solar wind speed is preliminary (* on days with no or too few measurements from SOHO-CELIAS/MTOF PM, measurements from DSCOVR or ACE are used)
3) Ap and Kp values in red are based on the definitive Potsdam WDC data.
4) Flare enhanced measurements and measurements that most likely are invalid are replaced by other same day measurements ## (daily QC). Solar flux measurements that may be invalid are temporarily marked ** , while interpolated values are marked # .
5) Suspected faulty measurement or incomplete observation.
6) Sunspot count using other data sources than SDO - to be replaced when SDO imagery after Nov. 26 becomes available.

This page is normally updated once a day by Jan Alvestad.

[Solar Terrestrial Activity Report]