# 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 08 15 34560 34560.5 2632 10 0.667 1.000 0.333 1.000 1.333 1.667 2.333 1.000 3 4 2 4 5 6 9 4 5 107 117.1 120.1 1 2026 08 16 34561 34561.5 2632 11 1.000 1.667 1.667 0.667 0.333 0.000 0.333 0.333 4 6 6 3 2 0 2 2 3 92 128.7 131.9 1 2026 08 17 34562 34562.5 2632 12 0.667 1.667 2.333 1.000 2.333 3.000 3.333 3.667 3 6 9 4 9 15 18 22 11 83 124.4 127.4 1 2026 08 18 34563 34563.5 2632 13 3.667 4.667 3.667 1.667 2.333 1.667 5.333 4.333 22 39 22 6 9 6 56 32 24 69 124.7 127.8 1 2026 08 19 34564 34564.5 2632 14 2.333 4.667 4.000 4.000 2.000 1.667 2.333 3.000 9 39 27 27 7 6 9 15 17 70 126.1 129.2 1 2026 08 20 34565 34565.5 2632 15 2.667 1.667 1.667 1.667 3.000 2.000 3.333 2.667 12 6 6 6 15 7 18 12 10 60 124.7 127.7 1 2026 08 21 34566 34566.5 2632 16 3.000 2.333 1.333 1.000 1.667 1.000 1.000 1.667 15 9 5 4 6 4 4 6 7 76 125.6 128.5 1 2026 08 22 34567 34567.5 2632 17 0.667 0.333 0.000 1.333 1.000 1.000 0.667 0.333 3 2 0 5 4 4 3 2 3 75 124.3 127.1 1 2026 08 23 34568 34568.5 2632 18 0.667 1.333 1.333 1.333 1.667 1.000 1.333 1.333 3 5 5 5 6 4 5 5 5 76 128.0 130.8 1 2026 08 24 34569 34569.5 2632 19 2.000 1.000 0.333 0.667 0.333 0.333 1.000 3.000 7 4 2 3 2 2 4 15 5 88 143.0 146.2 1 2026 08 25 34570 34570.5 2632 20 1.000 0.333 0.667 0.667 0.667 0.667 0.333 0.000 4 2 3 3 3 3 2 0 2 82 132.5 135.3 1 2026 08 26 34571 34571.5 2632 21 0.000 0.333 0.333 0.333 0.667 0.333 0.000 0.333 0 2 2 2 3 2 0 2 2 85 131.0 133.8 1 2026 08 27 34572 34572.5 2632 22 0.667 0.000 0.333 0.333 0.333 0.333 0.333 1.000 3 0 2 2 2 2 2 4 2 83 122.1 124.6 1 2026 08 28 34573 34573.5 2632 23 1.000 0.000 0.667 1.333 3.333 3.000 3.667 4.000 4 0 3 5 18 15 22 27 12 77 115.8 118.2 1 2026 08 29 34574 34574.5 2632 24 4.333 3.333 4.000 2.667 2.333 2.000 3.667 2.000 32 18 27 12 9 7 22 7 17 76 111.4 113.6 1 2026 08 30 34575 34575.5 2632 25 3.333 3.667 3.333 3.333 2.000 2.667 2.333 2.333 18 22 18 18 7 12 9 9 14 70 106.6 108.7 1 2026 08 31 34576 34576.5 2632 26 3.000 3.333 3.333 3.000 1.667 1.667 1.333 0.667 15 18 18 15 6 6 5 3 11 58 107.0 109.0 1 2026 09 01 34577 34577.5 2632 27 0.667 1.333 1.667 2.333 1.667 1.333 1.667 1.333 3 5 6 9 6 5 6 5 6 64 100.5 102.3 0 2026 09 02 34578 34578.5 2633 1 0.667 0.667 2.000 2.000 1.333 0.333 1.333 1.333 3 3 7 7 5 2 5 5 5 41 139.0 141.5 0 2026 09 03 34579 34579.5 2633 2 2.000 1.000 0.333 0.333 1.000 1.667 2.000 1.667 7 4 2 2 4 6 7 6 5 41 108.2 110.1 0 2026 09 04 34580 34580.5 2633 3 1.333 0.667 0.667 1.333 0.667 0.333 0.667 0.000 5 3 3 5 3 2 3 0 3 59 109.6 111.4 0 2026 09 05 34581 34581.5 2633 4 1.667 2.667 2.333 2.000 0.667 0.333 0.333 1.000 6 12 9 7 3 2 2 4 6 76 110.7 112.5 0 2026 09 06 34582 34582.5 2633 5 1.000 0.667 0.667 1.000 0.333 1.000 2.000 1.333 4 3 3 4 2 4 7 5 4 82 109.5 111.2 0 2026 09 07 34583 34583.5 2633 6 0.667 1.667 3.333 3.333 3.000 3.667 3.667 4.667 3 6 18 18 15 22 22 39 18 97 109.7 111.4 0 2026 09 08 34584 34584.5 2633 7 4.667 4.333 5.000 3.667 3.333 4.000 3.333 3.333 39 32 48 22 18 27 18 18 28 101 110.4 112.0 0 2026 09 09 34585 34585.5 2633 8 2.667 1.333 1.667 2.333 3.333 3.000 2.667 2.667 12 5 6 9 18 15 12 12 11 106 109.2 110.7 0 2026 09 10 34586 34586.5 2633 9 3.000 2.667 1.333 2.667 2.333 1.000 1.000 3.000 15 12 5 12 9 4 4 15 10 104 114.5 116.1 0 2026 09 11 34587 34587.5 2633 10 1.333 2.667 2.000 2.667 2.000 1.333 0.667 2.000 5 12 7 12 7 5 3 7 7 94 110.0 111.5 0 2026 09 12 34588 34588.5 2633 11 1.333 2.333 2.333 2.000 1.667 1.000 1.000 0.667 5 9 9 7 6 4 4 3 6 91 108.5 109.9 0 2026 09 13 34589 34589.5 2633 12 2.333 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 9 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1.0 -1.0 0