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)
(daily avg)		 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
20260228 140.7     196 135 44 7.3 7 5-12 23112122 12112211 24223255 383-481 24    
20260227 138.5     130 61 53 9.1 9 5-15 32223312 21333312 33224435 423-500 16    
20260226 129.8     146 108 43 15.6 16 7-22 44433232 25343332 55333364 469-571 12    
20260225 124.7     154 93 25 12.8 13 7-22 32233324 32232313 43334345 479-593 25 2  
20260224 119.6     145 83 0 14.4 14 9-22 34333233 33333323 44433365 595-749 13    
20260223 107.9     136 52 0 21.3 21 6-39 35333244 34333344 46534255 522-738      
20260222 110.1     105 28 0 34.5 34 22-56 45544445 44454454 55534557 503-727* 4    
20260221 109.9     108 58 11 14.1 14 5-27 43321234 43321333 64222235 459-564*      
20260220 111.1     138 81 34 11.1 11 3-27 12223334 13333322 31222356 443-520* 1    
20260219 116.4     140 70 39 9.6 10 4-15 33323111 33223211 43322124 447-540 3    
20260218 118.7     194 127 43 9.0 9 7-15 23222222 13322321 43323245 452-570 2    
20260217 121.5     167 113 63 9.4 9 7-15 22232322 23232322 43323345 506-714 3    
20260216 117.9     225 138 69 26.1 26 7-67 44432462 44442461 65542685 547-747 2 1  
20260215 117.5     164 117 65 25.8 26 12-56 55333334 55232433 55533355 520-732 2    
20260214 116.9     167 127 60 10.0 10 2-39 32001125 23001233 43100136 357-565 3    
20260213 117.3     190 103 50 12.8 13 6-27 42222324 32322323 62232446 360-453   1  
20260212 129.0     170 110 82 7.1 7 3-9 22221212 22231211 42221314 371-436 6 1  
20260211 128.9     186 138 84 16.3 16 9-27 43332334 33332333 65333455 400-515 27 4  
20260210 142.1     247 142 105 9.8 10 2-32 10132234 10133333 20021246 379-504 25 1  
20260209 144.1     217 127 107 6.4 6 4-9 21112212 11223221 43301114 355-483 22 2  
20260208 167.4     267 186 118 6.5 6 4-12 22111123 12121222 43110234 381-619 35 3  
20260207 169.4     305 217 128 14.6 15 7-22 44332333 43332333 55332445 433-563 39    
20260206 163.7     244 144 132 14.8 15 0-32 01234443 01334443 02223654 482-672 38    
20260205 175.9     261 197 139 21.1 21 4-56 45443111 35433221 56552121 438-711 29 13  
20260204 167.2     284 197 166 8.1 8 0-22 00112324 00122533 00001546 298-502 31 14 1
20260203 177.6     314 177 171 4.4 4 2-7 22111120 01112221 33000331 295-360 18 21 1
20260202 173.8     316 193 131 5.4 5 3-9 22111111 23222211 33001033 295-354 11 32 3
20260201 161.5     277 213 97 3.4 3 0-5 00111111 01111211 00012223 299-383 21 28 2
Average 136.4     199.8 126.3 73.5 12.88 12.79
International sunspot number (SILSO-WDC): 78.2
K factor       0.39 0.62 1.06  

1) Calculated based on data obtained courtesy of the Institute of Ionosphere, Kazakhstan
 2) Solar wind speed is preliminary (* on days with none 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 temporarily using other data sources than SDO.

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

[Solar Terrestrial Activity Report]