# PURPOSE: This file distributes the geomagnetic planetary three-hour index Kp and associated geomagnetic indices as well as relevant solar indices. # LICENSE: CC BY 4.0, except for the sunspot numbers contained in this file, which have the CC BY-NC 4.0 license # SOURCE: Geomagnetic Observatory Niemegk, GFZ Helmholtz Centre for Geosciences # PLEASE CITE: Matzka, J., Stolle, C., Yamazaki, Y., Bronkalla, O. and Morschhauser, A., 2021. The geomagnetic Kp index # and derived indices of geomagnetic activity. Space Weather, https://doi.org/10.1029/2020SW002641 # # Kp, ap and Ap # The three-hourly equivalent planetary amplitude ap is derived from Kp and the daily equivalent planetary amplitude Ap is the daily mean of ap. # Kp is unitless. Ap and ap are unitless and can be multiplied by 2 nT to yield the average geomagnetic disturbance at 50 degree geomagnetic latitude. # Kp, ap and Ap were introduced by Bartels (1949, 1957) and are produced by Geomagnetic Observatory Niemegk, GFZ Helmholtz Centre for Geosciences. # Described in: Matzka et al. (2021), see reference above. # Data publication: Matzka, J., Bronkalla, O., Tornow, K., Elger, K. and Stolle, C., 2021. Geomagnetic Kp index. V. 1.0. GFZ Data Services, # https://doi.org/10.5880/Kp.0001 # Note: the most recent values are nowcast values and will be replaced by definitive values as soon as they become available. # # International Sunspot Number SN # The international sunspot number SN (written with subscript N) is given as the daily total sunspot number version 2.0 introduced in 2015. # The sunspot data is available under the licence CC BY-NC 4.0 from WDC-SILSO, Royal Observatory of Belgium, Brussels. Described in: # Clette, F., Lefevre, L., 2016. The New Sunspot Number: assembling all corrections. Solar Physics, 291, https://doi.org/10.1007/s11207-016-1014-y # Note: the most recent values are preliminary and replaced by definitive values as soon as they become available. # # F10.7 Solar Radio Flux # Local noon-time observed (F10.7obs) and adjusted (F10.7adj) solar radio flux F10.7 in s.f.u. (10^-22 W m^-2 Hz^-1) is provided by # Dominion Radio Astrophysical Observatory and Natural Resources Canada. # Described in: Tapping, K.F., 2013. The 10.7 cm solar radio flux (F10.7). Space Weather, 11, 394-406, https://doi.org/10.1002/swe.20064 # Note: For ionospheric and atmospheric studies the use of F10.7obs is recommended. # # Short file description (for a detailed file description, see Kp_ap_Ap_SN_F107_format.txt): # 40 header lines, all starting with # # ASCII, blank separated and fixed length, missing data indicated by -1.000 for Kp, -1 for ap and SN, -1.0 for F10.7 # YYYY MM DD is date of UT day, days is days since 1932-01-01 00:00 UT to start of UT day, days_m is days since 1932-01-01 00:00 UT to midday of UT day # BSR is Bartels solar rotation number, dB is day within BSR # Kp1 to Kp8 (Kp for the eight eighth of the UT day), ap1 to ap8 (ap for the eight eighth of the UT day), Ap, SN, F10.7obs, F10.7adj # D indicates if the Kp and SN values are definitive or preliminary. D=0: Kp and SN preliminary; D=1: Kp definitive, SN preliminary; D=2 Kp and SN definitive # # # The format for each line is (i stands for integer, f for float): #iii ii ii iiiii fffff.f iiii ii ff.fff ff.fff ff.fff ff.fff ff.fff ff.fff ff.fff ff.fff iiii iiii iiii iiii iiii iiii iiii iiii iiii iii ffffff.f ffffff.f i # The parameters in each line are: #YYY MM DD days days_m Bsr dB Kp1 Kp2 Kp3 Kp4 Kp5 Kp6 Kp7 Kp8 ap1 ap2 ap3 ap4 ap5 ap6 ap7 ap8 Ap SN F10.7obs F10.7adj D 2025 12 21 34323 34323.5 2623 16 3.333 2.667 3.000 3.667 4.667 4.667 3.333 4.667 18 12 15 22 39 39 18 39 25 68 123.9 120.0 1 2025 12 22 34324 34324.5 2623 17 3.333 3.333 3.333 3.000 4.667 3.667 3.667 4.333 18 18 18 15 39 22 22 32 23 82 133.3 129.0 1 2025 12 23 34325 34325.5 2623 18 3.000 3.667 3.333 3.333 3.333 3.333 4.000 4.000 15 22 18 18 18 18 27 27 20 110 141.6 137.0 1 2025 12 24 34326 34326.5 2623 19 4.000 4.333 3.667 2.667 3.333 3.333 3.000 2.667 27 32 22 12 18 18 15 12 20 131 134.2 129.8 1 2025 12 25 34327 34327.5 2623 20 3.000 3.000 3.000 2.000 2.333 2.333 1.333 1.667 15 15 15 7 9 9 5 6 10 128 162.5 157.2 1 2025 12 26 34328 34328.5 2623 21 1.333 2.333 2.000 2.000 2.333 3.333 0.667 1.000 5 9 7 7 9 18 3 4 8 126 166.4 160.9 1 2025 12 27 34329 34329.5 2623 22 1.000 2.667 1.667 1.667 1.000 1.000 2.333 1.667 4 12 6 6 4 4 9 6 6 150 177.7 171.8 1 2025 12 28 34330 34330.5 2623 23 2.000 0.667 0.667 2.000 2.000 2.667 2.333 2.000 7 3 3 7 7 12 9 7 7 162 187.7 181.6 1 2025 12 29 34331 34331.5 2623 24 3.000 2.667 2.333 2.333 2.000 1.000 0.333 2.000 15 12 9 9 7 4 2 7 8 145 195.8 189.4 1 2025 12 30 34332 34332.5 2623 25 1.333 1.667 1.667 1.333 3.000 2.667 2.000 1.000 5 6 6 5 15 12 7 4 8 143 182.1 176.1 1 2025 12 31 34333 34333.5 2623 26 2.000 1.333 2.000 1.667 3.333 1.333 1.000 1.000 7 5 7 6 18 5 4 4 7 143 170.5 164.8 1 2026 01 01 34334 34334.5 2623 27 2.000 3.000 2.667 2.333 3.333 2.333 2.333 2.667 7 15 12 9 18 9 9 12 11 128 169.2 163.6 0 2026 01 02 34335 34335.5 2624 1 3.000 4.000 3.333 2.333 3.667 3.333 5.000 4.333 15 27 18 9 22 18 48 32 24 123 166.0 160.5 0 2026 01 03 34336 34336.5 2624 2 3.000 3.000 2.000 2.000 3.000 2.667 2.333 1.000 15 15 7 7 15 12 9 4 10 106 165.2 159.8 0 2026 01 04 34337 34337.5 2624 3 0.333 0.000 0.000 0.667 0.333 1.000 1.667 3.000 2 0 0 3 2 4 6 15 4 115 157.4 152.2 0 2026 01 05 34338 34338.5 2624 4 3.333 4.000 4.667 2.667 2.667 0.667 0.333 1.667 18 27 39 12 12 3 2 6 15 103 154.3 149.2 0 2026 01 06 34339 34339.5 2624 5 1.000 0.333 1.000 2.000 2.333 0.333 0.333 0.333 4 2 4 7 9 2 2 2 4 118 144.5 139.7 0 2026 01 07 34340 34340.5 2624 6 0.333 0.333 0.000 0.333 0.667 0.667 2.000 2.333 2 2 0 2 3 3 7 9 4 127 135.0 130.6 0 2026 01 08 34341 34341.5 2624 7 4.333 3.333 3.667 2.000 0.667 0.667 2.000 3.000 32 18 22 7 3 3 7 15 13 80 140.2 135.5 0 2026 01 09 34342 34342.5 2624 8 3.333 3.333 2.333 2.000 1.333 2.333 3.000 1.667 18 18 9 7 5 9 15 6 11 60 116.8 113.0 0 2026 01 10 34343 34343.5 2624 9 2.000 3.000 3.333 2.667 4.667 3.333 5.667 6.000 7 15 18 12 39 18 67 80 32 65 114.2 110.4 0 2026 01 11 34344 34344.5 2624 10 4.333 3.000 3.000 2.667 4.333 5.000 5.000 4.000 32 15 15 12 32 48 48 27 29 66 110.6 107.0 0 2026 01 12 34345 34345.5 2624 11 3.000 4.333 3.667 2.667 1.333 2.000 3.000 4.333 15 32 22 12 5 7 15 32 18 -1 112.9 109.2 0 2026 01 13 34346 34346.5 2624 12 3.333 3.000 2.000 2.000 0.333 1.333 2.667 2.000 18 15 7 7 2 5 12 7 9 50 116.6 112.8 0 2026 01 14 34347 34347.5 2624 13 1.667 2.000 0.667 1.000 2.000 1.333 1.667 3.000 6 7 3 4 7 5 6 15 7 65 126.5 122.4 0 2026 01 15 34348 34348.5 2624 14 3.000 2.000 3.000 2.333 1.333 2.667 3.000 2.333 15 7 15 9 5 12 15 9 11 95 139.3 134.8 0 2026 01 16 34349 34349.5 2624 15 3.333 3.667 3.333 2.667 3.333 5.000 4.000 5.000 18 22 18 12 18 48 27 48 26 142 147.5 142.8 0 2026 01 17 34350 34350.5 2624 16 5.000 3.667 4.000 3.000 3.000 3.667 4.000 3.667 48 22 27 15 15 22 27 22 25 134 159.2 154.1 0 2026 01 18 34351 34351.5 2624 17 3.000 3.667 2.667 2.000 2.333 2.667 3.667 3.000 15 22 12 7 9 12 22 15 14 144 231.8 224.4 0 2026 01 19 34352 34352.5 2624 18 3.333 1.667 0.333 1.333 1.333 3.333 8.333 8.667 18 6 2 5 5 18 236 300 74 168 173.4 167.9 0