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
20170823 85.1 93 63 40 21.0 21 9-39 34324452 35435442 433-488 4    
20170822 90.2 125 87 48 17.6 18 6-39 54322224 55322323 448-580 3    
20170821 87.1 136 96 43 8.3 8 4-12 22331123 32432333 505-604 4    
20170820 86.0 98 61 44 17.6 18 9-39 45322333 56443323 585-734 5 1  
20170819 86.8 110 59 33 25.9 26 12-32 43444434 45544434 548-728 11    
20170818 80.0 80 47 41 17.5 18 6-39 43234353 53233342 506-569 2    
20170817 76.7 74 39 30 21.0 21 7-39 32454333 33555433 379-560      
20170816 77.3 58 36 30 4.9 5 4-7 11111112 11222313 346-434      
20170815 74.2 36 28 21 2.6 3 0-5 11100001 12112212 350-450 2    
20170814 73.0 30 15 12 4.5 4 2-7 21011111 31012221 381-557 6    
20170813 68.2 11 11 11 6.0 6 5-9 22221112 23212321 465-580      
20170812 70.3 12 11 11 9.1 9 3-15 33211133 44312433 438-587      
20170811 69.8 12 11 11 5.9 6 4-12 11111132 12222332 347-453      
20170810 71.0 34 22 11 3.9 4 2-7 01112101 11132311 349-389      
20170809 71.4 13 11 11 3.5 4 2-5 00111111 11211211 351-429      
20170808 71.1 21 13 11 3.8 4 3-6 11111121 11122321 355-436      
20170807 72.7 18 14 11 4.3 4 2-7 11221101 02322211 429-555      
20170806 73.5 32 13 13 11.3 11 5-27 32242123 34342222 509-636      
20170805 74.1 37 16 13 14.3 14 7-22 24323343 34423433 585-713      
20170804 74.1 26 15 13 20.3 20 9-32 23444433 24444433 360-681      
20170803 75.1 32 24 13 10.5 10 2-27 01012344 11113434 289-402      
20170802 74.4 14 12 12 5.8 6 2-6 11012111 1112**12 305-416      
20170801 73.5 23 12 0 3.9 4 2-7 11112101 11223310 289-438 1    
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      

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]