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
(Tromsų)		 C M X
Measured
(20h UT)		 (02-11 UT) 2K 1K
  1AU
20230430 153.5     330 220 105 9.4 9 3-18 33312212 23422312 55413214 486-618 20 1  
20230429 155.8     302 161 82 19.0 19 9-27 33444432 43434422 56454554 607-752 15    
20230428 149.8     291 201 111 17.8 18 12-27 34333433 35333322 55424554 603-754 21    
20230427 140.8     288 195 136 22.8 23 15-32 44334433 45333432 56444565 580-707 13 1  
20230426 136.1     292 186 81 14.8 15 7-18 33233333 33223343 45334355 503-690 3    
20230425 130.7     243 160 63 7.1 7 2-15 10013232 22222322 20113255 476-684 6    
20230424 133.9     199 133 88 67.0 67 7-207 78754323 67663323 77744313 417-763 4    
20230423 135.2     238 153 86 64.4 64 6-207 22235687 22244455 54145675 356-754 4    
20230422 141.2     232 152 87 5.5 6 2-9 22100112 23211312 33111235 346-406 10    
20230421 140.7     260 158 114 7.9 8 4-15 21122223 22223422 11023366 356-411 6 1  
20230420 147.0     281 191 97 4.1 4 3-7 11111212 01112312 00011211 385-476 26    
20230419 147.0     259 150 113 9.5 10 3-27 21134211 31244322 41134521 424-663 18    
20230418 153.2     297 189 140 13.6 14 2-39 01114543 11114433 00003444 344-634 13    
20230417 166.6     302 193 162 4.5 4 2-6 11111201 11222211 21113403 343-412 15    
20230416 177.8     381 257 155 4.5 4 2-6 11211001 11321212 21212122 331-433 16    
20230415 175.8     390 254 151 6.8 7 5-9 31222212 *1322222 51124245 318-380 25    
20230414 171.3     422 271 153 5.4 5 0-9 10122212 11223311 30023215 347-408 28 2  
20230413 159.5     466 280 134 5.3 5 2-9 22001222 22101421 33000345 361-424 25    
20230412 154.0     328 222 127 2.6 3 0-5 00101011 01211221 00002200 354-401 19    
20230411 143.4     351 201 103 4.4 4 2-9 01211120 11322311 10101322 379-472 17 1  
20230410 139.8     362 210 92 12.1 12 5-18 33333311 33333312 54423322 370-567 30 1  
20230409 140.3     272 161 52 5.9 6 3-15 31111112 20112212 42012224 318-381 28    
20230408 135.9 158.1 158.5 190 101 49 4.8 5 2-7 12211102 02211211 33112205 346-409 16 1  
20230407 136.3 134.8 135.0 135 82 38 7.6 8 4-15 33222112 23312312 54322125 361-441 14    
20230406 137.1 130.1 130.2 223 150 33 7.0 7 4-15 11122132 11233331 32022345 387-426 11 1  
20230405 136.6 124.5 124.6 277 161 37 10.8 11 6-18 32223332 33334422 44223445 399-519 11    
20230404 135.7 119.4 119.3 227 129 44 12.6 13 5-22 44222133 33323322 54322254 483-566 8    
20230403 133.9 121.8 121.7 235 157 56 12.3 12 5-22 41123343 32233323 42224465 477-557 4    
20230402 126.9     192 139 54 13.9 14 3-22 44332123 44433222 44433035 493-626 4    
20230401 125.3 127.2 127.0 124 73 23 13.6 14 4-22 21233434 ******** 51134665 481-625 2    

1) Data obtained courtesy of the Institute of Ionosphere, Kazakhstan
 2) Solar wind speed is preliminary (* on days with none or 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.

[Solar Terrestrial Activity Report]