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
20210511 76.1     60 48 31 2.8 3 2-6 21000000 22111211 21000002 296-331      
20210510 76.5     97 40 36 5.9 6 4-9 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 2.0 2 0-5 00001111 00011321 00001100 272-331   1  
20210506 70.8 69.9 71.2 52 45 0 3.0 3 0-5 11111110 11111201 00012200 277-332      
20210505 69.5 70.4 71.6 0 0 0 1.5 2 0-3 01000001 10011211 00001001 288-374      
20210504 70.6 74.0 75.2 11 0 0 3.5 4 2-6 20110111 11121211 00101220 353-485      
20210503 71.6 68.8 69.9 0 0 0 4.5 4 2-7 21211101 ******** 11121100 333-453      
20210502 72.0 68.0 69.0 34 0 0 9.4 9 4-18 33311222 33321*** 66311101 287-379      
20210501 71.6     12 11 11 4.9 5 2-7 20121112 11222322 30011224 276-378      
20210430 72.9 73.3 74.4 25 22 35 4.9 5 0-12 01010322 12012322 10010333 284-354      
20210429 74.5## 75.2 76.3 53 48 37 4.1 4 2-5 11111110 22111221 11012200 282-337      
20210428 76.8 76.6 77.6 78 59 42 2.0 2 0-4 10000101 20111220 41101022 310-393      
20210427 79.4 79.5 80.5 107 62 47 6.1 6 2-15 33111100 33222311 64222323 381-502      
20210426 80.3 80.5 81.5 117 93 54 12.0 12 3-32 44312112 44422312 66623104 401-460 1    
20210425 78.8 80.7 81.7 114 62 57 17.8 18 6-48 54333232 53342322 66344344 432-506 1    
20210424 78.5 81.2 82.2 101 85 62 7.9 8 4-12 33221113 33331222 54333234 379-468      
20210423 77.4 78.6 79.4 82 66 29 12.6 13 4-32 33221334 32422324 53122457 354-440 6    
20210422 83.5     85 49 42 4.3 4 0-7 11111002 22312202 32122005 358-454 12    
20210421 78.0 79.6 80.4 91 67 47 5.9 6 3-9 22222111 23332111 42322113 468-556 1    
20210420 80.0 81.6 82.3 92 54 54 12.1 12 6-18 33232233 34331232 44232455 539-646 1    
20210419 85.9 76.4 77.0 118 78 36 17.0 17 12-22 34333333 34443333 56333364 549-647   1  
20210418 78.1 74.9 75.5 90 55 15 16.8 17 9-22 43343233 34442233 75443366 470-658      
20210417 75.3 74.9 75.5 71 62 28 27.9 28 15-39 45544434 44534433 66433556 436-643      
20210416 76.5 77.0 77.6 76 56 44 18.8 19 7-48 22323354 23323443 22233455 351-481      
20210415 77.1## 76.6 77.1 94 68 22 12.5 12 3-39 33512211 23523312 52412200 329-403      
20210414 74.4 75.4 75.8 74 32 17 5.6 6 0-15 11021223 12112323 00021216 346-447      
20210413 72.8 74.8 75.3 53 27 16 4.6 5 2-7 01111212 02122322 00112231 346-360      
20210412 75.3## 74.7 75.1 69 40 16 4.3 4 2-7 10121211 10231311 10112322 338-361      

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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