Solar and geomagnetic data

Date Solar flux density
2.8 GHz		 Sunspot number Planetary A index
(3)		 K indices
(3-hour intervals) (3)		 Solar wind
speed range
(km/s)
(SOHO)(2)		 Number
of flares
DRAO (4) Almaty (1)
(averages)		 STAR
(SDO)		 NOAA STAR
ap avg		 Pots-
dam
WDC		 Daily
ap range		 Planetary
(WDC)		 Boulder Andenes C M X
Measured (20h UT) (02-11 UT) 2K 1K
  1AU
20210531 81.7 73.0 75.1 78 67 31 2.0 2 0-3 11100100 11111201 30001100 286-354      
20210530 74.4 74.0 76.0 46 37 27 4.8 5 3-9 11111112 21122223 00211113 350-434      
20210529 76.0 77.0 79.1 61 51 26 5.0 5 0-9 01122122 01122222 00133221 340-431 3    
20210528 77.4 82.1 84.3 77 38 28 1.8 2 0-3 01001000 11012211 12001100 347-446 2    
20210527 83.3 84.9 87.1 52 34 34 14.5 14 4-32 43432221 ******** 55333332 350-441 3    
20210526 88.0 83.0 85.2 108 66 34 12.0 12 3-39 11113353 0******* 30002236 287-414 7    
20210525 83.5 73.0 74.9 108 71 36 2.5 2 0-5 00001101 01012312 00011104 281-325      
20210524 72.7 78.0 80.0 81 67 29 2.0 2 0-5 10010000 20021101 31101000 307-358      
20210523 79.0 75.0 76.9 72 52 30 3.3 3 2-5 01111011 02121312 11110023 342-383 4 1  
20210522 75.6 74.0 75.9 65 49 19 4.3 4 3-7 11111121 11212222 40012243 371-448 9 2  
20210521 73.7 72.0 73.8 84 40 13 5.4 5 3-9 22221111 2232**** 64222322 435-569 1    
20210520 72.3 75.0 76.9 72 28 13 23.5 24 7-56 32245443 32344333 54166555 327-564      
20210519 75.9 75.1 76.9 42 27 24 4.8 5 3-9 21111113 21211212 20211035 304-410      
20210518 76.4 75.0 76.8 65 51 24 8.9 9 2-22 34322110 34432122 66223201 319-409 1    
20210517 74.8 72.1 73.7 52 36 11 5.1 5 3-7 11111222 22312322 21212243 320-400      
20210516 73.2 72.0 73.7 44 25 11 3.5 4 0-6 10111121 10122221 21011232 302-381      
20210515 73.3 71.1 72.6 63 59 24 6.8 7 3-18 31221111 32322211 51222223 372-424      
20210514 70.9 74.0 75.6 67 45 24 3.3 3 0-7 01100112 11100213 20001143 348-421      
20210513 74.7 74.1 75.7 50 41 24 5.9 6 4-7 22212112 33322222 45212234 348-506      
20210512 74.7     53 34 31 41.5 42 4-132 11447723 10436522 20346435 285-497 1    
20210511 76.1 75.5 77.0 60 48 31 2.5 2 0-6 21000000 22111211 21000002 296-331      
20210510 76.5 73.1 74.6 97 40 36 5.9 6 4-7 12122121 23222322 00023243 310-363      
20210509 76 73.1 74.5 65 40 18 2.6 3 0-5 00001101 00112212 00001100 283-334 3    
20210508 75.9 69.5 70.8 56 32 17 2.8 3 0-5 10111000 10112211 00011000 284-330 2    
20210507 74.5 69.7 71.0 50 36 15 2.4 2 0-4 00001111 00011321 00001100 272-331   1  
20210506 70.8 69.9 71.2 52 45 0 2.9 3 0-5 11011100 11111201 00012200 277-332      
20210505 69.5 70.4 71.6 0 0 0 1.4 1 0-3 00000001 10011211 00001001 288-374      
20210504 70.6 74.0 75.2 11 0 0 3.4 3 2-5 10110111 11121211 00101220 353-485      
20210503 71.6 68.8 69.9 0 0 0 4.6 5 2-7 21221101 ******** 11121100 333-453      
20210502 72.0 68.0 69.0 34 0 0 8.5 8 3-15 33311212 33321*** 66311101 287-379      
20210501 71.6     12 11 11 4.4 4 0-7 10121111 11222322 30011224 276-378      
Average 75.4 74.0 75.7 57.3 37.7 20.0 6.50 6.48
International sunspot number (SILSO-WDC): 21.2
K factor       0.37 0.56 1.06  

1) Data obtained courtesy of the Institute of Ionosphere, Kazakhstan
2) Solar wind speed is preliminary (* on days with too few measurements from SOHO-CELIAS/MTOF PM, measurements from DSCOVR are used)
3) Ap and Kp values in red are based on the definitive Potsdam WDC data.
4) Flare enhanced measurements and measurements that most likely are invalid are replaced by other same day measurements ## (continuous QC process). Solar flux measurements that may be invalid are temporarily marked ** , while interpolated values are marked # .

This page is normally updated once a day by Jan Alvestad.

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