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
20170930 89.4 48 37 38 14.1 14 7-27 23323423 23333323 447-558      
20170929 89.7 69 56 39 11.0 11 6-18 32233223 33424312 536-632      
20170928 90.9 74 46 40 51.3 51 22-111 56754445 56553334 569-768      
20170927 91.0 57 41 35 37.3 37 12-94 33544466 32443354 318-710 1    
20170926 90.7 63 53 40 3.1 3 0-7 11110002 00211212 275-411 1    
20170925 89.9 74 49 36 4.1 4 2-9 22110000 32111210 344-464      
20170924 86.9 70 40 22 5.9 6 3-12 12111223 12122222 318-452      
20170923 81.2 44 24 12 4.4 4 3-9 11111121 12201221 337-387      
20170922 77.5 29 23 22 5.1 5 2-9 11101122 11301212 333-391      
20170921 73.0 50 33 22 5.1 5 2-9 11212012 11322211 352-459      
20170920 73.9 37 33 22 8.5 8 3-18 33222121 34332221 433-509      
20170919 70.6 75 45 11 7.3 7 4-12 22121232 21132222 453-559      
20170918 72.2 53 24 12 20.3 20 12-32 44443333 5564*033 514-717      
20170917 72.2 53 24 13 14.0 14 5-27 33224421 44334322 566-724      
20170916 72.1 30 26 13 28.0 28 15-56 55334433 55344323 568-753      
20170915 72.8 47 28 13 34.5 34 15-67 64434355 55544344 572-760      
20170914 74.2 28 14 11 21.5 22 4-56 22134544 22223543 346-718      
20170913 75.1 16 13 11 14.5 14 0-56 53422120 44432211 367-629      
20170912 75.5 28 25 11 16.6 17 6-56 22223245 31444334 438-650 2    
20170911 79.9 38 35 23 11.1 11 7-18 33223233 43322322 508-584      
20170910 92.7 84 59 38 4.5 4 0-15 00000323 11111423 452-603 6   1
20170909 107.2 114 92 49 3.0 3 0-9 22001000 32311220 460-702 11 4  
20170908 116.8 151 93 89 106.1 106 32-236 85458765 74447544 628-861 16 5  
20170907 128.5 200 132 94 36.0 36 7-179 34333248 24454326 446-806 19 4 1
20170906 127.3 191 126 79 8.5 8 5-18 11133203 12234314 349-621 9 6 2
20170905 120.5 183 126 122 11.3 11 5-27 43222231 33323331 444-599 15 5  
20170904 134.0 223 141 122 16.5 16 6-39 43222345 44222344 447-564 19 8  
20170903 120.2 222 137 96 7.0 7 3-12 22123212 33133222 455-565 3    
20170902 100.0 170 104 71 20.0 20 6-39 45532333 56543333 539-651 5    
20170901 93.4 104 61 62 16.0 16 7-27 33244224 43244323 514-741 3    
Average 91.3 87.5 58.0 42.3 18.22 18.07  
International sunspot number (SILSO-WDC): 43.6
K factor   0.50 0.75 1.03  

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]