# 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 07 20 34534 34534.5 2631 11 0.667 0.333 1.000 0.667 0.667 0.333 0.667 1.000 3 2 4 3 3 2 3 4 3 83 136.9 141.3 0 2026 07 21 34535 34535.5 2631 12 2.000 2.667 3.000 3.667 2.667 2.667 3.000 3.000 7 12 15 22 12 12 15 15 14 95 149.0 153.8 0 2026 07 22 34536 34536.5 2631 13 1.667 2.667 2.000 3.000 3.000 2.333 1.667 2.333 6 12 7 15 15 9 6 9 10 87 150.2 155.0 0 2026 07 23 34537 34537.5 2631 14 2.000 1.667 2.667 2.667 3.000 5.333 5.667 3.333 7 6 12 12 15 56 67 18 24 101 147.6 152.3 0 2026 07 24 34538 34538.5 2631 15 4.000 2.667 1.667 0.667 0.333 0.333 0.667 1.000 27 12 6 3 2 2 3 4 7 109 150.1 154.9 0 2026 07 25 34539 34539.5 2631 16 0.667 0.667 0.667 1.667 1.333 2.000 2.667 1.333 3 3 3 6 5 7 12 5 6 -1 144.6 149.2 0 2026 07 26 34540 34540.5 2631 17 1.333 1.667 1.333 1.667 1.000 0.333 0.000 1.000 5 6 5 6 4 2 0 4 4 -1 148.3 152.9 0 2026 07 27 34541 34541.5 2631 18 1.333 0.667 1.333 0.667 0.667 1.667 1.667 2.667 5 3 5 3 3 6 6 12 5 104 146.6 151.2 0 2026 07 28 34542 34542.5 2631 19 2.333 1.000 1.333 2.000 2.000 1.667 1.667 2.333 9 4 5 7 7 6 6 9 7 100 143.3 147.7 0 2026 07 29 34543 34543.5 2631 20 2.333 2.000 1.000 0.667 0.667 0.667 0.667 0.667 9 7 4 3 3 3 3 3 4 106 142.8 147.1 0 2026 07 30 34544 34544.5 2631 21 1.000 0.667 0.333 1.333 0.667 1.000 0.667 0.667 4 3 2 5 3 4 3 3 3 125 151.7 156.3 0 2026 07 31 34545 34545.5 2631 22 1.333 0.667 0.667 0.667 1.667 1.000 0.667 1.000 5 3 3 3 6 4 3 4 4 118 147.6 152.0 0 2026 08 01 34546 34546.5 2631 23 0.667 0.667 0.667 0.667 0.667 0.333 0.000 1.000 3 3 3 3 3 2 0 4 3 111 139.7 143.8 0 2026 08 02 34547 34547.5 2631 24 0.333 0.667 1.333 1.000 4.000 5.667 3.667 1.667 2 3 5 4 27 67 22 6 17 126 126.9 130.7 0 2026 08 03 34548 34548.5 2631 25 4.333 4.333 2.667 3.000 3.333 1.667 3.000 3.667 32 32 12 15 18 6 15 22 19 105 125.6 129.3 0 2026 08 04 34549 34549.5 2631 26 4.333 2.333 2.333 2.000 0.667 0.667 0.667 1.000 32 9 9 7 3 3 3 4 9 98 118.0 121.4 0 2026 08 05 34550 34550.5 2631 27 0.333 0.333 1.000 0.000 0.000 0.000 0.333 1.667 2 2 4 0 0 0 2 6 2 77 107.5 110.6 0 2026 08 06 34551 34551.5 2632 1 1.333 0.667 0.000 0.000 0.000 0.000 0.333 0.000 5 3 0 0 0 0 2 0 1 58 101.2 104.1 0 2026 08 07 34552 34552.5 2632 2 0.000 0.333 1.000 0.667 1.333 0.333 0.000 0.333 0 2 4 3 5 2 0 2 2 56 96.5 99.2 0 2026 08 08 34553 34553.5 2632 3 0.667 1.667 2.000 4.000 5.667 3.333 5.667 4.000 3 6 7 27 67 18 67 27 28 42 93.7 96.3 0 2026 08 09 34554 34554.5 2632 4 2.667 2.000 1.667 1.333 1.000 1.000 1.667 2.000 12 7 6 5 4 4 6 7 6 28 93.7 96.3 0 2026 08 10 34555 34555.5 2632 5 2.000 0.667 1.333 1.333 0.333 0.000 0.000 1.333 7 3 5 5 2 0 0 5 3 40 95.4 98.0 0 2026 08 11 34556 34556.5 2632 6 0.667 0.333 0.000 1.667 2.667 3.000 1.667 1.000 3 2 0 6 12 15 6 4 6 45 96.5 99.1 0 2026 08 12 34557 34557.5 2632 7 1.667 2.667 2.000 1.667 2.333 1.333 2.333 1.000 6 12 7 6 9 5 9 4 7 75 100.1 102.7 0 2026 08 13 34558 34558.5 2632 8 2.333 2.333 1.333 1.000 0.667 0.667 1.333 3.000 9 9 5 4 3 3 5 15 7 90 107.6 110.4 0 2026 08 14 34559 34559.5 2632 9 2.667 2.333 2.667 2.333 2.000 1.333 2.333 1.333 12 9 12 9 7 5 9 5 8 107 113.5 116.4 0 2026 08 15 34560 34560.5 2632 10 0.667 1.333 0.333 0.667 1.333 1.667 2.667 1.333 3 5 2 3 5 6 12 5 5 109 117.1 120.1 0 2026 08 16 34561 34561.5 2632 11 1.333 1.667 2.000 0.667 0.333 0.000 0.333 0.667 5 6 7 3 2 0 2 3 4 97 128.7 131.9 0 2026 08 17 34562 34562.5 2632 12 1.000 1.667 2.333 1.000 2.667 3.000 3.667 3.667 4 6 9 4 12 15 22 22 12 85 124.4 127.4 0 2026 08 18 34563 34563.5 2632 13 4.000 4.667 3.667 -1.000 -1.000 -1.000 -1.000 -1.000 27 39 22 -1 -1 -1 -1 -1 -1 73 -1.0 -1.0 0