# 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 2026 05 18 34471 34471.5 2629 2 2.333 1.667 2.000 1.667 2.667 2.333 2.000 2.667 9 6 7 6 12 9 7 12 8 80 105.3 107.7 1 2026 05 19 34472 34472.5 2629 3 1.667 2.667 3.333 3.333 4.000 3.667 2.667 2.667 6 12 18 18 27 22 12 12 16 73 105.7 108.1 1 2026 05 20 34473 34473.5 2629 4 3.000 2.667 1.333 0.667 1.333 1.000 1.333 2.000 15 12 5 3 5 4 5 7 7 66 114.0 116.7 1 2026 05 21 34474 34474.5 2629 5 2.667 2.000 1.000 1.333 2.000 1.000 2.000 1.333 12 7 4 5 7 4 7 5 6 86 117.9 120.8 1 2026 05 22 34475 34475.5 2629 6 1.000 1.000 1.333 1.333 0.333 1.000 0.667 2.333 4 4 5 5 2 4 3 9 4 107 124.4 127.5 1 2026 05 23 34476 34476.5 2629 7 0.333 0.333 1.000 0.333 0.333 0.000 0.000 0.000 2 2 4 2 2 0 0 0 2 118 137.1 140.6 1 2026 05 24 34477 34477.5 2629 8 0.333 0.667 0.667 1.000 1.667 1.333 2.333 1.667 2 3 3 4 6 5 9 6 5 111 132.8 136.2 1 2026 05 25 34478 34478.5 2629 9 2.667 1.667 1.000 1.667 1.667 2.000 2.333 2.667 12 6 4 6 6 7 9 12 8 110 139.0 142.6 1 2026 05 26 34479 34479.5 2629 10 2.000 0.333 1.000 1.000 0.667 1.000 2.667 3.667 7 2 4 4 3 4 12 22 7 146 140.8 144.5 1 2026 05 27 34480 34480.5 2629 11 2.000 2.000 2.333 1.333 1.667 2.667 2.667 3.000 7 7 9 5 6 12 12 15 9 174 141.7 145.5 1 2026 05 28 34481 34481.5 2629 12 1.667 2.000 2.333 2.333 2.333 3.333 3.000 3.667 6 7 9 9 9 18 15 22 12 154 144.9 148.8 1 2026 05 29 34482 34482.5 2629 13 2.667 2.333 2.000 1.667 3.000 3.333 4.000 3.333 12 9 7 6 15 18 27 18 14 138 148.1 152.1 1 2026 05 30 34483 34483.5 2629 14 3.000 2.667 1.000 1.333 2.000 2.333 4.000 3.667 15 12 4 5 7 9 27 22 13 129 141.6 145.5 1 2026 05 31 34484 34484.5 2629 15 3.333 2.333 2.000 1.333 2.667 2.000 1.667 2.333 18 9 7 5 12 7 6 9 9 113 135.6 139.3 1 2026 06 01 34485 34485.5 2629 16 1.333 1.000 1.333 1.333 2.667 3.000 2.333 1.333 5 4 5 5 12 15 9 5 8 116 131.9 135.6 0 2026 06 02 34486 34486.5 2629 17 2.333 1.667 1.333 1.000 1.333 1.000 2.333 1.667 9 6 5 4 5 4 9 6 6 127 146.1 150.3 0 2026 06 03 34487 34487.5 2629 18 2.667 2.333 1.667 2.000 1.333 2.000 2.333 3.000 12 9 6 7 5 7 9 15 9 142 146.8 151.0 0 2026 06 04 34488 34488.5 2629 19 2.667 2.333 0.333 0.333 1.667 1.000 0.333 1.000 12 9 2 2 6 4 2 4 5 150 147.9 152.2 0 2026 06 05 34489 34489.5 2629 20 1.000 3.000 1.667 2.667 5.333 6.333 5.000 5.000 4 15 6 12 56 94 48 48 35 147 140.5 144.6 0 2026 06 06 34490 34490.5 2629 21 4.667 3.667 4.333 2.667 3.667 2.667 1.667 2.333 39 22 32 12 22 12 6 9 19 154 137.9 141.9 0 2026 06 07 34491 34491.5 2629 22 2.667 1.667 1.667 2.333 1.333 2.000 0.667 1.667 12 6 6 9 5 7 3 6 7 148 134.2 138.2 0 2026 06 08 34492 34492.5 2629 23 1.000 2.000 2.333 2.333 2.667 1.333 1.333 1.667 4 7 9 9 12 5 5 6 7 149 130.7 134.7 0 2026 06 09 34493 34493.5 2629 24 2.000 2.333 1.667 2.000 2.667 3.667 3.333 2.667 7 9 6 7 12 22 18 12 12 132 129.5 133.5 0 2026 06 10 34494 34494.5 2629 25 1.667 1.000 1.000 2.667 2.667 1.667 1.333 1.333 6 4 4 12 12 6 5 5 7 113 124.0 127.8 0 2026 06 11 34495 34495.5 2629 26 0.667 2.333 3.333 3.000 2.667 2.333 5.000 4.000 3 9 18 15 12 9 48 27 18 93 127.4 131.4 0 2026 06 12 34496 34496.5 2629 27 3.000 3.333 3.667 3.000 3.000 1.667 2.000 2.667 15 18 22 15 15 6 7 12 14 79 128.3 132.3 0 2026 06 13 34497 34497.5 2630 1 3.000 3.000 2.333 2.667 2.667 2.333 3.667 2.333 15 15 9 12 12 9 22 9 13 53 121.5 125.3 0 2026 06 14 34498 34498.5 2630 2 2.000 1.667 1.333 2.000 1.333 1.333 1.333 1.333 7 6 5 7 5 5 5 5 6 67 127.6 131.6 0 2026 06 15 34499 34499.5 2630 3 1.667 1.000 1.000 0.667 0.667 0.333 1.333 1.667 6 4 4 3 3 2 5 6 4 74 117.0 120.7 0 2026 06 16 34500 34500.5 2630 4 2.000 1.333 1.000 1.000 2.333 2.667 -1.000 -1.000 7 5 4 4 9 12 -1 -1 -1 80 -1.0 -1.0 0