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
20170731 72.2 22 11 0 2.5 2 0-4 01011001 ******11 288-348      
20170730 69.5 38 23 11 2.9 3 0-4 11110110 ******** 289-381      
20170729 69.9 30 25 12 3.4 3 2-5 01111101 11221211 350-417      
20170728 69.5 15 0 0 6.8 7 3-12 11112332 21222331 369-452      
20170727 68.3 22 0 0 5.3 5 2-12 01111312 22112313 367-516      
20170726 68.6 26 0 0 10.0 10 0-27 42412110 32432211 456-645      
20170725 69.8 27 12 12 9.1 9 5-15 21223223 22333423 521-592      
20170724 70.1 32 23 0 10.3 10 6-18 23322223 23432323 559-678      
20170723 70.6 15 12 0 12.5 12 7-27 32333224 33443223 468-591      
20170722 69.5 12 12 0 15.1 15 6-32 32442222 23452323 482-627      
20170721 69.4 0 0 0 12.6 13 5-22 43212313 44323423 458-701      
20170720 70.2 46 0 0 6.4 6 3-15 11111233 11122323 349-478      
20170719 73.1 0 0 0 3.0 3 2-5 01010111 11122321 348-504 1    
20170718 78.2 11 0 0 6.0 6 2-15 23211101 33212211 417-650 6    
20170717 85.6 13 13 13 26.5 26 6-67 34444622 35544422 387-584 2    
20170716 86.5 58 16 26 43.5 44 4-80 22556565 22555445 285-587 5    
20170715 88.0 60 47 34 3.0 3 2-4 11100111 11211311 281-335 5    
20170714 89.0 84 59 58 2.3 2 2-3 00001101 11111311 324-353 4 1  
20170713 92.3 88 62 55 3.1 3 2-5 11001111 1111**11 343-383 4    
20170712 90.2 95 51 43 3.5 4 3-5 11111111 11011222 387-472      
20170711 91.1 83 57 27 6.4 7 4-9 22212211 24412312 463-647 1    
20170710 95.1 59 30 32 8.3 8 3-22 34211112 34110323 436-587 1    
20170709 90.9 85 48 31 24.1 24 7-56 53252343 ******** 346-543 5 1  
20170708 86.6 63 45 24 2.5 3 2-4 10010000 1011111* 277-348 1    
20170707 79.5 37 25 25 4.0 4 2-7 21001111 22112311 289-399 1    
20170706 75.9 29 21 16 5.9 6 3-15 11112213 11221223 277-352      
20170705 73.0 25 14 11 1.6 2 0-3 00000001 11012111 277-315      
20170704 71.8 25 22 0 3.6 4 2-6 11100012 11111222 284-362 1    
20170703 71.7 0 0 0 4.9 5 3-6 22111112 23221211 351-445   1  
20170702 71.2 11 11 11 17.4 17 6-32 33443233 33332234 318-514      
20170701 70.7 35 22 11 11.8 12 6-18 13323332 24323332 327-441      
Average 77.4 43.6 28.2 19.7 8.97 8.90  
International sunspot number (SILSO-WDC): 18.3
K factor   0.42 0.65 0.93  

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]