# 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 09 18 34594 34594.5 2633 17 1.000 1.667 1.667 1.333 0.667 0.667 1.000 1.333 4 6 6 5 3 3 4 5 4 6 95.9 96.8 1 2026 09 19 34595 34595.5 2633 18 2.000 2.667 1.333 1.000 1.000 1.333 1.333 1.667 7 12 5 4 4 5 5 6 6 13 97.1 98.0 1 2026 09 20 34596 34596.5 2633 19 2.000 2.667 1.667 0.333 0.333 0.333 0.333 1.000 7 12 6 2 2 2 2 4 5 52 100.8 101.7 1 2026 09 21 34597 34597.5 2633 20 1.333 0.667 0.000 0.000 0.000 0.000 0.333 1.000 5 3 0 0 0 0 2 4 2 69 104.1 104.9 1 2026 09 22 34598 34598.5 2633 21 1.667 0.333 0.000 0.000 0.000 0.667 0.667 0.667 6 2 0 0 0 3 3 3 2 104 118.4 119.2 1 2026 09 23 34599 34599.5 2633 22 0.333 0.000 0.000 0.333 0.000 0.333 1.333 1.667 2 0 0 2 0 2 5 6 2 121 120.5 121.3 1 2026 09 24 34600 34600.5 2633 23 2.667 2.000 2.667 4.000 3.333 3.333 2.000 2.667 12 7 12 27 18 18 7 12 14 111 112.4 113.1 1 2026 09 25 34601 34601.5 2633 24 3.667 3.333 3.667 4.000 3.333 2.667 3.000 4.000 22 18 22 27 18 12 15 27 20 89 105.4 106.0 1 2026 09 26 34602 34602.5 2633 25 3.333 3.333 2.333 2.667 1.333 1.000 2.000 2.333 18 18 9 12 5 4 7 9 10 56 101.0 101.5 1 2026 09 27 34603 34603.5 2633 26 4.000 2.667 1.333 1.000 1.000 0.667 0.667 0.000 27 12 5 4 4 3 3 0 7 48 97.4 97.8 1 2026 09 28 34604 34604.5 2633 27 0.000 1.333 0.333 0.667 0.667 0.667 1.000 0.333 0 5 2 3 3 3 4 2 3 19 95.3 95.6 1 2026 09 29 34605 34605.5 2634 1 1.667 0.000 0.333 1.000 0.333 0.667 0.333 0.667 6 0 2 4 2 3 2 3 3 20 91.9 92.2 1 2026 09 30 34606 34606.5 2634 2 0.667 0.333 0.000 0.667 0.667 0.333 0.333 0.333 3 2 0 3 3 2 2 2 2 30 93.2 93.5 1 2026 10 01 34607 34607.5 2634 3 0.000 0.333 0.333 0.333 0.667 1.333 1.333 1.667 0 2 2 2 3 5 5 6 3 27 92.4 92.6 0 2026 10 02 34608 34608.5 2634 4 0.667 0.667 0.000 0.333 0.333 0.000 0.667 1.667 3 3 0 2 2 0 3 6 2 32 92.4 92.6 0 2026 10 03 34609 34609.5 2634 5 1.333 2.667 2.000 1.667 1.333 0.333 0.333 1.000 5 12 7 6 5 2 2 4 5 55 93.3 93.4 0 2026 10 04 34610 34610.5 2634 6 3.000 3.333 4.333 5.000 4.667 4.667 5.667 5.000 15 18 32 48 39 39 67 48 38 61 91.8 91.9 0 2026 10 05 34611 34611.5 2634 7 4.000 5.000 2.000 3.333 2.667 4.000 3.667 3.667 27 48 7 18 12 27 22 22 23 71 100.3 100.3 0 2026 10 06 34612 34612.5 2634 8 3.000 3.000 2.333 2.333 2.333 1.333 2.333 2.667 15 15 9 9 9 5 9 12 10 88 112.8 112.8 0 2026 10 07 34613 34613.5 2634 9 1.000 0.333 1.000 0.333 0.667 2.667 2.667 1.000 4 2 4 2 3 12 12 4 5 72 113.7 113.6 0 2026 10 08 34614 34614.5 2634 10 1.000 1.000 1.000 2.000 1.333 1.333 2.333 1.000 4 4 4 7 5 5 9 4 5 76 119.2 119.0 0 2026 10 09 34615 34615.5 2634 11 3.000 3.000 2.000 3.667 1.667 0.667 1.000 2.667 15 15 7 22 6 3 4 12 10 91 120.6 120.3 0 2026 10 10 34616 34616.5 2634 12 2.000 3.333 2.667 2.000 3.667 7.333 7.000 5.667 7 18 12 7 22 154 132 67 52 87 125.5 125.1 0 2026 10 11 34617 34617.5 2634 13 4.000 3.667 2.667 3.000 2.333 2.333 1.667 2.000 27 22 12 15 9 9 6 7 13 84 121.9 121.5 0 2026 10 12 34618 34618.5 2634 14 1.667 2.000 3.000 1.000 0.333 1.000 2.000 1.000 6 7 15 4 2 4 7 4 6 89 122.9 122.4 0 2026 10 13 34619 34619.5 2634 15 3.333 3.333 2.000 3.000 3.000 2.000 2.667 1.000 18 18 7 15 15 7 12 4 12 65 136.0 135.3 0 2026 10 14 34620 34620.5 2634 16 2.333 3.333 1.333 2.000 1.667 2.000 2.667 2.667 9 18 5 7 6 7 12 12 10 101 123.2 122.6 0 2026 10 15 34621 34621.5 2634 17 2.000 1.000 0.667 3.333 2.333 3.000 2.667 2.333 7 4 3 18 9 15 12 9 10 73 125.7 125.0 0 2026 10 16 34622 34622.5 2634 18 3.000 1.000 1.333 2.333 1.667 3.333 4.000 2.000 15 4 5 9 6 18 27 7 11 80 131.2 130.4 0 2026 10 17 34623 34623.5 2634 19 1.667 0.333 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 6 2 -1 -1 -1 -1 -1 -1 -1 65 -1.0 -1.0 0