# 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 03 17 34409 34409.5 2626 21 1.667 1.000 1.000 0.667 0.667 0.333 0.667 0.667 6 4 4 3 3 2 3 3 4 61 111.1 110.1 1 2026 03 18 34410 34410.5 2626 22 0.333 1.000 1.000 1.333 0.667 0.667 0.667 1.667 2 4 4 5 3 3 3 6 4 59 112.9 111.8 1 2026 03 19 34411 34411.5 2626 23 0.000 0.333 0.333 0.333 1.000 0.667 0.000 0.000 0 2 2 2 4 3 0 0 2 34 106.0 105.1 1 2026 03 20 34412 34412.5 2626 24 1.333 2.667 3.333 3.667 3.000 3.333 5.333 6.333 5 12 18 22 15 18 56 94 30 29 102.1 101.2 1 2026 03 21 34413 34413.5 2626 25 7.000 5.667 5.000 4.000 3.333 3.000 3.667 2.667 132 67 48 27 18 15 22 12 43 41 107.2 106.4 1 2026 03 22 34414 34414.5 2626 26 3.667 4.667 4.667 6.333 6.000 7.000 6.667 6.667 22 39 39 94 80 132 111 111 78 99 120.1 119.3 1 2026 03 23 34415 34415.5 2626 27 5.000 3.667 3.333 2.667 4.667 5.000 4.333 4.333 48 22 18 12 39 48 32 32 31 111 124.3 123.5 1 2026 03 24 34416 34416.5 2627 1 2.667 3.667 3.000 3.333 3.000 3.000 3.000 2.333 12 22 15 18 15 15 15 9 15 109 128.3 127.5 1 2026 03 25 34417 34417.5 2627 2 2.667 3.333 5.000 3.333 1.000 1.667 2.667 0.333 12 18 48 18 4 6 12 2 15 105 140.1 139.4 1 2026 03 26 34418 34418.5 2627 3 2.333 1.667 2.000 1.667 2.333 3.000 2.000 2.000 9 6 7 6 9 15 7 7 8 112 152.2 151.5 1 2026 03 27 34419 34419.5 2627 4 1.333 2.000 1.333 1.000 1.000 2.000 1.667 2.333 5 7 5 4 4 7 6 9 6 136 156.4 155.7 1 2026 03 28 34420 34420.5 2627 5 3.333 1.333 2.667 2.333 1.333 1.667 1.333 3.000 18 5 12 9 5 6 5 15 9 128 161.8 161.2 1 2026 03 29 34421 34421.5 2627 6 3.333 3.667 3.000 1.667 3.333 3.667 1.000 1.667 18 22 15 6 18 22 4 6 14 133 157.9 157.4 1 2026 03 30 34422 34422.5 2627 7 2.000 2.667 3.333 2.667 3.333 1.667 2.000 1.000 7 12 18 12 18 6 7 4 10 133 151.8 151.4 1 2026 03 31 34423 34423.5 2627 8 1.000 2.667 1.667 1.667 2.000 1.667 1.000 1.333 4 12 6 6 7 6 4 5 6 135 140.8 140.5 1 2026 04 01 34424 34424.5 2627 9 3.000 1.667 1.000 1.000 3.000 2.333 1.333 2.333 15 6 4 4 15 9 5 9 8 138 141.9 141.7 0 2026 04 02 34425 34425.5 2627 10 4.667 4.333 5.000 4.667 5.000 6.000 4.667 3.667 39 32 48 39 48 80 39 22 43 155 140.3 140.2 0 2026 04 03 34426 34426.5 2627 11 3.667 3.333 5.333 4.000 3.667 6.667 5.333 5.667 22 18 56 27 22 111 56 67 47 135 135.8 135.8 0 2026 04 04 34427 34427.5 2627 12 4.000 4.000 2.667 2.333 0.667 1.667 4.000 2.000 27 27 12 9 3 6 27 7 15 118 128.1 128.2 0 2026 04 05 34428 34428.5 2627 13 3.667 3.333 3.000 2.333 2.333 3.000 1.333 0.667 22 18 15 9 9 15 5 3 12 100 118.0 118.1 0 2026 04 06 34429 34429.5 2627 14 1.333 2.667 2.000 2.000 2.000 2.667 2.667 2.333 5 12 7 7 7 12 12 9 9 107 116.4 116.5 0 2026 04 07 34430 34430.5 2627 15 3.000 2.333 1.333 0.333 1.333 2.333 1.333 3.000 15 9 5 2 5 9 5 15 8 97 108.9 109.1 0 2026 04 08 34431 34431.5 2627 16 2.333 1.667 1.000 2.000 2.000 1.667 2.333 1.333 9 6 4 7 7 6 9 5 7 79 108.4 108.7 0 2026 04 09 34432 34432.5 2627 17 1.333 1.000 2.000 1.000 2.333 1.667 1.667 2.333 5 4 7 4 9 6 6 9 6 66 96.7 97.0 0 2026 04 10 34433 34433.5 2627 18 3.667 2.667 2.333 1.667 4.333 3.667 3.667 1.667 22 12 9 6 32 22 22 6 16 31 93.7 94.1 0 2026 04 11 34434 34434.5 2627 19 2.000 4.000 3.667 3.333 2.333 1.667 1.667 1.000 7 27 22 18 9 6 6 4 12 45 93.3 93.7 0 2026 04 12 34435 34435.5 2627 20 2.000 2.333 2.000 2.000 2.333 1.333 1.667 2.000 7 9 7 7 9 5 6 7 7 42 98.8 99.3 0 2026 04 13 34436 34436.5 2627 21 0.333 1.000 0.667 0.333 0.333 1.000 0.667 1.000 2 4 3 2 2 4 3 4 3 59 98.7 99.2 0 2026 04 14 34437 34437.5 2627 22 1.333 0.000 0.000 1.000 1.000 1.000 0.333 0.333 5 0 0 4 4 4 2 2 3 60 100.9 101.5 0 2026 04 15 34438 34438.5 2627 23 1.000 1.000 1.000 0.333 1.000 1.667 1.000 1.333 4 4 4 2 4 6 4 5 4 53 104.8 105.5 0