Solar and geomagnetic data

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 C M X
2K 1K
20180919 67.9 0 0 0 3.5 4 0-9 12110100 12211010 360-453      
20180918 68.1 11 0 0 5.3 5 3-9 22221111 21331211 446-559      
20180917 67.8 0 0 0 9.0 9 6-15 32222223 32222223 357-589      
20180916 69.1 27 23 0 4.4 4 0-7 12111012 11222211 351-459      
20180915 68.5 24 12 0 6.4 6 3-9 22222112 33332212 446-755*      
20180914 69.0 23 0 0 13.5 14 7-32 44222232 54221233 527-758*      
20180913 69.6 11 11 0 15.4 15 7-22 44333323 34433323 450-561      
20180912 69.7 14 11 11 7.9 8 4-22 22111224 22112213 450-577      
20180911 69.4 19 14 14 27.9 28 9-56 35553332 35564322 496-646      
20180910 69.0 17 13 0 18.4 18 2-48 00123545 11223444 345-543      
20180909 68.4 13 11 12 5.3 5 2-9 21101122 12212222 343-472      
20180908 68.7 34 18 16 3.9 4 0-9 10210112 10211112 347-413      
20180907 67.5 13 0 0 4.1 4 2-7 22111101 32112201 353-575      
20180906 67.4 11 11 0 4.4 4 2-7 21101112 21212222 346-448      
20180905 67.5 23 11 0 8.9 9 4-18 33133211 33233212 421-572      
20180904 67.5 12 0 0 7.1 7 3-12 23211123 23422323 346-443      
20180903 68.1 0 0 0 3.5 4 2-6 11001112 22111211 338-377      
20180902 67.7 0 0 0 4.4 4 0-7 12100112 12211211 296-362      
20180901 68.3 0 0 0 3.8 4 2-6 11001121 11112311 345-415      
20180831 67.5 0 0 0 4.3 4 3-9 11011221 11212311 345-422      
20180830 68.3 0 0 0 3.4 3 2-6 11100012 21112211 345-460      
20180829 70.5 0 0 0 5.4 5 3-9 22111211 22222212 446-563      
20180828 69.8 11 0 11 8.4 8 2-22 43232110 33333211 509-563      
20180827 69.6 36 11 12 24.6 25 5-67 12344653 23354443 509-637      
20180826 71.1 43 26 26 66.8 67 15-154 57755653 55755553 347-555      
20180825 71.6 38 30 31 11.9 12 3-32 11223244 11323434 337-485      
20180824 72.4 55 34 29 4.4 4 0-12 01113101 01132321 331-362      
20180823 69.5 47 40 15 3.5 4 2-6 21101111 21212221 347-449      
20180822 66.9 36 11 12 4.9 5 2-9 22101102 23212222 423-544      
20180821 67.8 55 26 15 6.9 7 5-12 31221112 32332222 537-689      
20180820 68.0 21 17 15 14.5 14 6-27 43223342 44122242 449-694      

This page is normally updated once a day by Jan Alvestad. Solar wind speed is preliminary. 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 Terrestrial Activity Report]