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
20190523 66.5 0 0 0 4.3 4 3-6 11111112 21132311 309-345      
20190522 67.3 11 11 0 3.8 4 2-6 01211011 11221211 312-363      
20190521 68.0 0 0 0 3.3 3 2-5 11111010 11013311 346-415      
20190520 68.7 0 0 0 5.5 6 2-6 32111101 32212311 349-405      
20190519 68.0 0 0 0 2.4 2 0-6 00100002 10212312 339-368      
20190518 70.6 12 11 11 3.5 4 2-7 11221000 11342211 350-420      
20190517 72.1 14 13 13 4.0 4 2-9 21101101 32212311 360-491      
20190516 73.6 15 13 13 6.9 7 4-15 12111133 12221223 379-454      
20190515 74.0 18 14 13 5.0 5 2-9 12102221 12212321 348-489 1    
20190514 74.4 27 25 24 34.4 34 5-111 36732441 46543332 421-632      
20190513 74.7 28 24 23 5.5 6 2-9 10121222 01222333 299-464      
20190512 76.0 40 30 24 3.9 4 0-7 21100112 20211111 308-381      
20190511 78.0 45 32 26 21.6 22 9-39 54444223 64554312 305-404      
20190510 76.3 47 29 24 7.3 7 3-15 22111233 12221223 308-347      
20190509 76.2 31 26 25 5.5 6 4-9 11221112 12322322 284-369 1    
20190508 75.3 36 26 24 1.6 2 0-4 10000001 01011201 284-299      
20190507 78.7 41 37 27 4.3 4 2-7 12101121 23112321 289-359 2    
20190506 76.0 47 29 25 4.1 4 2-6 10012121 10022222 341-351 7    
20190505 73.5 20 14 14 2.6 3 0-5 11000111 11001221 346-451      
20190504 72.3 14 13 12 7.8 8 3-12 12232221 12343222 385-497 1    
20190503 69.8 35 24 11 6.9 7 4-12 22211123 32422323 346-504 1    
20190502 69.2 0 0 0 9.9 10 6-18 33222221 44332221 465-557      
20190501 67.6 0 0 0 11.1 11 3-27 12212344 12222333 286-539      
20190430 68.5 0 0 0 4.0 4 0-6 21011121 21111211 280-342      
20190429 66.9 0 0 0 4.1 4 0-6 21011211 22012211 343-393      
20190428 67.9 11 11 0 4.1 4 2-7 10101122 11102222 345-394      
20190427 66.9 0 0 0 5.3 5 2-7 10221122 10332222 344-365      
20190426 67.2 0 0 0 3.4 3 0-6 10011112 10011212 346-443      
20190425 67.5 0 0 0 4.5 4 2-6 12222010 12321211 346-443      
20190424 69.3 11 11 0 6.4 6 2-15 31022211 32033212 344-443      

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]