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
20150524 98.7 125 84 74 3.6 4 2-5 11100011 22111322 312-350      
20150523 97.7 133 104 69 2.6 3 0-4 01111011 11112212 277-391 3    
20150522 99.1 185 109 81 1.8 2 0-5 10001000 11012211 314-451 1    
20150521 101.8 158 94 36 2.0 2 0-4 00001001 01012211 351-449 1    
20150520 105.6 166 125 61 5.8 6 2-12 23212110 23312311 395-556 2    
20150519 110.3 159 119 84 13.3 13 4-48 53222221 44232332 450-596 3    
20150518 115.0 243 176 83 13.9 14 5-56 21223135 22234355 337-500 2    
20150517 119.6 211 151 75 4.3 4 2-6 21101121 22122321 350-403      
20150516 131.0 201 151 103 4.6 5 3-6 11111112 21212312 369-506      
20150515 136.5 243 180 113 6.4 6 3-9 22222112 22332312 446-569 7    
20150514 145.1 308 233 126 7.5 8 5-12 22212123 33422323 550-768 10    
20150513 157.0 321 224 135 41.3 41 22-80 56644444 56544433 586-772 13    
20150512 163.2 347 226 170 13.1 13 9-18 23333233 33444343 337-633 9    
20150511 163.0 339 229 188 13.1 13 6-22 44223223 45433233 340-385 12    
20150510 159.9 277 195 134 8.9 9 4-22 21243122 23343322 346-440 7    
20150509 154.5 227 164 136 7.4 7 2-12 10031333 11022333 345-539 5    
20150508 149.8 244 163 134 5.1 5 2-9 22221011 33231212 341-508 9    
20150507 146.6 248 165 131 5.4 5 3-7 22111212 22112322 348-490 15    
20150506 136.2 260 182 110 20.3 20 6-56 33335432 33445422 349-489 28 1  
20150505 127.8 249 148 99 4.9 5 3-7 11122112 *****214 344-426 24 5 1
20150504 123.4 227 152 85 5.8 6 4-9 21212211 21320*** 353-454 10    
20150503 111.1 168 117 67 5.6 6 3-9 22211111 23322211 353-488 6    
20150502 105.7 163 102 25 6.6 7 4-12 12111133 22122333 360-560      
20150501 99.9 97 69 13 4.8 5 2-9 12101212 22111312 339-633 1    
20150430 101.8 90 66 27 4.1 4 2-9 21110021 21112122 273-430 1    
20150429 104.0 71 40 26 3.6 4 2-6 10012111 00012212 271-351 1    
20150428 107.7 98 74 36 5.1 5 2-9 21122110 22223211 275-350 1    
20150427 107.5 117 81 42 4.1 4 0-6 00122112 10122311 277-348      
20150426 118.5 149 108 55 1.6 2 0-4 00001001 10012212 271-371 2    
20150425 125.9 192 128 77 0.5 0 0-2 00000000 1101121* 300-356 1    

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]