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
20240523 176.2     249 156 130 9.4 9 3-27 12222224 12222334 01135445 374-417 41 5  
20240522 195.7     274 190 120 3.3 3 3-6 21000111 20011222 22000001 343-432 25 3  
20240521 190.8     313 212 146 7.4 7 4-12 21133222 21133321 21133433 379-466 22 1  
20240520 199.7     329 230 124 5.6 6 3-9 12212112 23323313 13222123 378-433 20    
20240519 200.7     383 242 154 8.1 8 5-15 13123222 13233322 25125432 386-437 20 3  
20240518 194.3     400 249 147 11.8 12 5-22 44232211 33343211 54434423 385-483 19    
20240517 204.1     382 254 168 29.6 30 6-80 22223565 22214544 23123566 345-506 24 1  
20240516 207.2     469 276 208 25.1 25 4-80 23654321 24554321 45644222 392-519 20 1  
20240515 216.0     418 269 173 8.9 9 5-15 12232232 12323332 12434354 434-541 15 4 2
20240514 219.8     354 252 185 6.1 6 3-9 11122221 22123322 21133231 496-675 15 5 3
20240513 215.4     450 267 207 26.8 27 9-80 56333322 67434333 36433222 586-904 29 14  
20240512 221.8     410 312 186 52.9 53 7-132 67442346 58542236 87443477 706-1036 35 15 1
20240511 213.7     401 272 148 270.8 271 179-400 98899888 97997666 78878687 682-1015 11 23 2
20240510 223.4     438 266 156 105.1 105 7-300 33224899 33323779 53124667 397-878 21 27 1
20240509 233.2     429 262 170 5.0 5 3-9 11111122 12022332 03122222 408-492 11 30 2
20240508 227.1     401 248 142 5.3 5 3-7 12222211 11122313 22223220 474-527 9 30 3
20240507 203.6     381 242 144 6.0 6 4-12 11112311 21133422 13223433 504-606 27 28  
20240506 171.2     346 223 148 16.1 16 5-56 52224221 53223321 52334342 375-595 42 7 1
20240505 176.9     315 235 152 10.0 10 4-32 21221134 22332233 42111145 320-406 24 18 2
20240504 166.6     316 196 136 4.8 5 2-15 11011113 11021213 11012136 356-461 48 7  
20240503 156.0     336 239 121 8.5 8 3-27 43111121 32222322 54221132 397-509 28 5 1
20240502 141.9     305 206 125 42.4 42 6-111 22235774 22345654 31135574 337-477 30 2  
20240501 134.8     311 217 104 7.0 7 2-22 42201121 42202232 52202133 339-453 17 4  
20240430 130.2     260 162 85 12.9 13 0-32 21013344 22113434 21012446 389-447 9 4  
20240429 137.6     191 133 88 6.0 6 4-12 21111231 21221322 21222232 383-511 18 2  
20240428 140.1     249 184 119 6.0 6 2-22 42111101 42222211 54111113 418-474 24    
20240427 152.6     293 188 126 12.1 12 4-18 33213233 22223333 53125234 351-490 19 2  
20240426 152.6     373 251 154 17.3 17 4-48 13324532 12333432 23444554 324-414 37    
20240425 166.7     431 271 211 1.8 2 0-3 00011011 01012311 00011013 307-363 22 5  
20240424 199.1     411 290 283 2.8 3 2-4 11001101 10012312 22011001 369-436 27 7  

1) Data obtained courtesy of the Institute of Ionosphere, Kazakhstan
2) Solar wind speed is preliminary (* on days with no or too few measurements from SOHO-CELIAS/MTOF PM, measurements from DSCOVR or ACE 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 ## (daily QC). 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]