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
20150531 94.3 98 76 47 4.4 4 2-6 11101212 21111312 335-387      
20150530 95.0 118 56 27 4.3 4 3-7 11112111 11222211 354-465      
20150529 92.3 69 53 23 6.3 6 3-7 12122222 12223322 350-460      
20150528 93.0 94 70 11 5.9 6 4-9 22122111 32*33312 311-376      
20150527 95.2 101 68 24 4.3 4 0-9 01012112 11123212 279-373 1    
20150526 94.5 190 118 48 5.4 5 2-9 22111220 22221321 274-347      
20150525 96.5 145 89 66 2.1 2 0-3 00011010 10012211 287-352      
20150524 98.7 125 84 74 3.8 4 2-6 12100011 22111322 312-350      
20150523 97.7 133 104 69 2.8 3 0-5 01111110 11112212 277-391 3    
20150522 99.1 185 109 81 2.3 2 0-5 10011000 11012211 314-451 1    
20150521 101.8 158 94 36 2.1 2 0-4 00001011 01012211 351-449 1    
20150520 105.6 166 125 61 6.1 6 0-12 33212110 23312311 395-556 2    
20150519 110.3 159 119 84 13.1 13 3-48 53222221 44232332 450-596 3    
20150518 115.0 243 176 83 14.8 15 5-56 12223135 22234355 337-500 2    
20150517 119.6 211 151 75 4.5 5 2-7 22101120 22122321 350-403      
20150516 131.0 201 151 103 4.6 5 3-6 11111112 21212312 369-506      
20150515 136.5 243 180 113 6.5 6 3-9 22222112 22332312 446-569 7    
20150514 145.1 308 233 126 8.4 8 4-15 22312123 33422323 550-768 10    
20150513 157.0 321 224 135 45.5 46 27-80 56654454 56544433 586-772 13    
20150512 163.2 347 226 170 14.6 15 12-18 33333333 33444343 337-633 9    
20150511 163.0 339 229 188 13.8 14 7-22 34223324 45433233 340-385 12    
20150510 159.9 277 195 134 9.3 9 3-22 21243122 23343322 346-440 7    
20150509 154.5 227 164 136 7.0 7 2-12 00031332 11022333 345-539 5    
20150508 149.8 244 163 134 5.4 5 3-12 32221111 33231212 341-508 9    
20150507 146.6 248 165 131 5.8 6 3-9 22112222 22112322 348-490 15    
20150506 136.2 260 182 110 22.5 22 6-56 33345432 33445422 349-489 28 1  
20150505 127.8 249 148 99 5.1 5 3-9 11122112 *****214 344-426 24 5 1
20150504 123.4 227 152 85 6.8 7 4-12 21213221 21320*** 353-454 10    
20150503 111.1 168 117 67 7.6 8 3-15 33211111 23322211 353-488 6    
20150502 105.7 163 102 25 7.4 7 4-15 12121233 22122333 360-560      
20150501 99.9 97 69 13 4.8 5 2-7 12101212 22111312 339-633 1    
Average 120.0 197.2 135.2 83.2 8.29 8.23  
International sunspot number (SILSO-WDC): 58.8
K factor   0.30 0.43 0.71  

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]