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)
NOAA STAR
ap avg
Pots-
dam
WDC
Daily
ap range
Planetary
(WDC)
Boulder Andenes C M X
Measured (20h UT) (02-11 UT) 2K 1K
  1AU
20210831 84.4     77 48 37 5.1 5 0-9 22211102 33222211 44212314 345-409      
20210830 90.6 88.0 89.8 103 56 41 6.5 6 3-12 12212113 13322312 12323136 362-447 7    
20210829 88.7 89.0 90.9 95 55 44 7.1 7 3-18 21111233 22111332 11012434 345-449 4    
20210828 89.5 89.2 91.0 122 85 77 13.3 13 2-39 53331220 53432321 65432531 345-404 10 2  
20210827 89.5 88.0 89.9 149 98 73 18.5 18 4-32 31244334 313***** 30135656 344-438 8    
20210826 88.6 83.1 85.0 144 93 47 4.6 5 2-7 22121011 22232302 32122243 348-434 3    
20210825 83.6 80.1 81.9 65 30 29 8.0 8 3-18 23311211 34422311 34422312 352-453 1    
20210824 80.9 77.1 78.9 98 48 29 4.4 4 2-9 10111122 10122322 00111132 271-409 1    
20210823 78.1 76.0 77.8 43 15 14 2.0 2 0-5 00100001 10112201 10000112 272-324      
20210822 77.1 76.0 77.8 19 15 16 2.1 2 0-3 11101100 11102211 01100100 272-393 3    
20210821 77.1 77.0 78.9 32 24 25 3.1 3 2-4 00111110 00222211 00012110 296-380      
20210820 77.7 74.1 75.8 63 24 14 5.6 6 0-12 01222310 01333310 12024432 286-350 3    
20210819 74.9 73.1 74.9 16 14 25 3.8 4 0-5 01011111 01133312 00023343 310-358      
20210818 75.3 71.6 73.3 84 42 16 5.4 5 2-12 32111110 22102121 54213330 346-463      
20210817 73.1 74.1 76.0 26 12 13 4.5 4 0-9 11121102 11132213 21122204 405-455      
20210816 74.4 74.2 76.1 50 18 14 6.9 7 3-15 32112212 33122212 52113345 428-494      
20210815 74.6 73.0 74.8 86 49 23 8.5 8 5-18 22311223 23322223 52233236 349-533      
20210814 72.6     77 50 47 3.1 3 2-5 11110110 11211322 21011222 331-455      
20210813 72.9 74.5 76.5 74 49 0 4.8 5 2-9 11221101 22333311 34112322 345-485 1    
20210812 73.6 71.9 73.8 45 36 11 3.4 3 0-6 00101122 01113422 00002242 346-455      
20210811 73.8 71.9 73.8 55 37 22 4.8 5 2-9 22211000 23322211 43222010 401-498      
20210810 73.3 73.6 75.6 51 23 0 5.9 6 4-9 22112112 23222312 32123203 345-483      
20210809 73.0 74.1 76.1 24 11 0 3.6 4 2-7 11211010 01322210 33110011 343-368      
20210808 73.5 74.2 76.3 35 11 0 4.1 4 2-9 21001111 21103212 42102232 345-448 1    
20210807 73.7 74.7 76.9 11 11 0 10.0 10 5-12 33223321 23233222 56323244 302-547      
20210806 74.4 72.6 74.7 34 11 0 6.4 6 3-12 12111223 12213213 01112454 272-330      
20210805 74.3 71.0 73.1 38 25 36 1.4 1 0-4 00000110 00002221 00001210 297-421      
20210804 70.8 74.1 76.2 58 41 14 4.0 4 0-7 21111100 22222311 52121200 301-415      
20210803 75.9 73.9 76.1 35 29 15 8.5 8 3-22 42222111 43443211 54323234 330-398      
20210802 74.6 74.8 77.0 47 21 13 14.9 15 2-39 10023454 10133433 30013454 346-457      
20210801 74.9 76.0 78.3 44 28 0 3.1 3 0-5 10011111 20012321 20012202 356-474      

1) 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 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 ## (continuous QC process). Solar flux measurements that may be invalid are temporarily marked ** , while interpolated values are marked # .

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

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