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
20180526 72.9 39 36 26 2.6 3 0-5 01001011 11012322 287-348      
20180525 75.7 47 30 32 2.8 3 0-4 11001110 21112111 328-376      
20180524 73.6 61 41 39 3.1 3 2-5 11001101 22112221 360-466      
20180523 73.1 72 30 30 7.1 7 2-12 12333101 23433212 323-471 1    
20180522 70.8 42 35 12 4.8 5 2-6 01212122 11312322 274-351  
   
20180521 69.6 13 12 12 1.8 2 0-4 01010001 01121201 274-339  
   
20180520 68.8 11 0 0 2.4 2 0-4 11101000 11112212 324-353  
   
20180519 70.3 0 0 0 1.9 2 0-4 00001111 00111211 327-356  
   
20180518 69.4 13 11 0 4.0 4 2-5 11011111 22112211 350-430  
   
20180517 69.0 0 0 0 8.5 8 6-12 32223222 22233332 334-453  
   
20180516 69.9 0 0 0 3.1 3 2-5 00001111 10011312 274-330  
   
20180515 70.3 0 0 0 3.6 4 2-5 11101111 00102312 290-353  
   
20180514 70.3 12 0 0 4.1 4 3-7 11111112 22121222 346-421  
   
20180513 70.9 23 0 11 6.6 7 3-9 12222222 13332322 369-476  
   
20180512 69.8 15 12 12 7.4 7 3-18 33111122 34221212 424-508  
   
20180511 70.3 17 13 11 12.4 12 6-18 23322233 24423233 427-503  
   
20180510 69.6 38 11 11 9.4 9 3-18 32322312 32433312 491-569  
   
20180509 69.6 27 23 22 13.6 14 6-27 32222244 43323334 553-699  
   
20180508 69.6 41 34 25 12.6 13 7-22 23232342 24333432 537-717  
   
20180507 69.6 30 24 14 14.8 15 6-27 44323323 35423323 569-697  
   
20180506 67.2 19 14 14 23.5 24 12-56 54333344 55433333 569-705  
   
20180505 67.6 18 14 14 22.0 22 2-67 11034546 11134444 304-554  
   
20180504 67.8 17 14 13 3.4 3 2-5 01111111 00211221 344-348  
   
20180503 66.5 13 0 0 3.0 3 2-6 10001112 10012312 325-352  
   
20180502 67.1 0 0 0 3.4 3 0-6 12111100 13322111 339-390  
   
20180501 68.4 12 11 0 2.4 2 2-3 00100011 01111111 352-428  
   
20180430 70.2 0 0 0 4.8 5 0-9 21112210 22222411 336-459  
   
20180429 71.1 11 0 0 3.0 3 0-5 00111101 10112322 330-351  
   
20180428 70.2 36 23 0 3.0 3 0-6 21101100 21212311 346-380  
   
20180427 68.7 18 0 11 4.8 5 0-12 10011322 10112423 328-379  
   

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]