# 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 04 28 34451 34451.5 2628 9 0.000 0.667 0.000 0.333 0.667 0.667 1.333 0.000 0 3 0 2 3 3 5 0 2 128 149.4 151.4 1 2026 04 29 34452 34452.5 2628 10 0.000 0.000 0.333 0.667 1.333 0.333 1.667 1.333 0 0 2 3 5 2 6 5 3 123 143.1 145.1 1 2026 04 30 34453 34453.5 2628 11 2.000 1.333 0.667 1.667 2.333 2.667 4.000 4.667 7 5 3 6 9 12 27 39 14 135 143.3 145.4 1 2026 05 01 34454 34454.5 2628 12 3.667 4.333 3.000 1.333 0.667 1.667 3.000 1.333 22 32 15 5 3 6 15 5 13 159 144.8 147.0 0 2026 05 02 34455 34455.5 2628 13 2.333 1.333 0.667 1.667 1.333 1.000 1.333 2.667 9 5 3 6 5 4 5 12 6 145 158.7 161.2 0 2026 05 03 34456 34456.5 2628 14 3.333 2.333 2.333 0.667 1.333 2.667 1.333 1.000 18 9 9 3 5 12 5 4 8 133 143.3 145.6 0 2026 05 04 34457 34457.5 2628 15 1.667 2.000 1.667 2.667 2.667 4.000 5.333 4.333 6 7 6 12 12 27 56 32 20 130 138.0 140.3 0 2026 05 05 34458 34458.5 2628 16 4.667 3.667 1.667 1.000 0.667 0.333 0.667 1.000 39 22 6 4 3 2 3 4 10 133 127.5 129.7 0 2026 05 06 34459 34459.5 2628 17 0.333 0.000 0.667 0.333 0.333 0.667 0.667 0.667 2 0 3 2 2 3 3 3 2 102 120.0 122.2 0 2026 05 07 34460 34460.5 2628 18 0.667 0.667 0.000 0.333 0.333 3.333 3.667 2.000 3 3 0 2 2 18 22 7 7 68 116.5 118.7 0 2026 05 08 34461 34461.5 2628 19 2.333 1.000 2.000 3.333 3.333 3.667 2.000 3.000 9 4 7 18 18 22 7 15 12 74 119.5 121.8 0 2026 05 09 34462 34462.5 2628 20 2.333 1.333 0.667 1.333 0.667 1.333 0.667 0.667 9 5 3 5 3 5 3 3 4 91 -1.0 -1.0 0 2026 05 10 34463 34463.5 2628 21 0.000 0.667 1.000 0.667 1.333 1.333 2.000 1.000 0 3 4 3 5 5 7 4 4 90 125.7 128.2 0 2026 05 11 34464 34464.5 2628 22 2.000 1.333 0.667 0.667 1.667 1.000 1.000 0.667 7 5 3 3 6 4 4 3 4 81 116.0 118.3 0 2026 05 12 34465 34465.5 2628 23 0.667 0.667 0.667 0.333 0.667 0.667 1.333 0.667 3 3 3 2 3 3 5 3 3 59 111.2 113.5 0 2026 05 13 34466 34466.5 2628 24 0.667 1.333 1.000 1.333 3.000 3.000 3.000 3.333 3 5 4 5 15 15 15 18 10 66 103.2 105.4 0 2026 05 14 34467 34467.5 2628 25 2.667 1.333 1.333 0.667 0.667 0.667 0.667 1.000 12 5 5 3 3 3 3 4 5 52 106.4 108.7 0 2026 05 15 34468 34468.5 2628 26 2.333 1.667 3.000 3.667 5.000 4.667 4.333 6.000 9 6 15 22 48 39 32 80 31 48 101.0 103.3 0 2026 05 16 34469 34469.5 2628 27 5.667 4.667 4.667 4.000 2.667 4.333 3.000 3.333 67 39 39 27 12 32 15 18 31 58 109.0 111.5 0 2026 05 17 34470 34470.5 2629 1 2.000 2.000 2.000 2.333 2.000 1.667 2.000 1.667 7 7 7 9 7 6 7 6 7 90 103.7 106.0 0 2026 05 18 34471 34471.5 2629 2 2.333 2.000 2.333 1.333 2.333 2.000 2.000 3.000 9 7 9 5 9 7 7 15 8 87 105.3 107.7 0 2026 05 19 34472 34472.5 2629 3 1.667 2.667 3.333 3.333 4.000 3.667 3.000 3.000 6 12 18 18 27 22 15 15 17 74 105.7 108.1 0 2026 05 20 34473 34473.5 2629 4 3.333 2.667 1.333 0.667 1.333 1.000 1.333 2.333 18 12 5 3 5 4 5 9 8 72 114.0 116.7 0 2026 05 21 34474 34474.5 2629 5 2.667 2.000 1.000 1.333 2.000 1.000 1.667 1.333 12 7 4 5 7 4 6 5 6 86 117.9 120.8 0 2026 05 22 34475 34475.5 2629 6 1.000 1.333 1.000 1.333 0.333 0.667 0.667 2.333 4 5 4 5 2 3 3 9 4 104 124.4 127.5 0 2026 05 23 34476 34476.5 2629 7 0.333 0.667 1.000 0.333 0.333 0.000 0.000 0.333 2 3 4 2 2 0 0 2 2 119 137.1 140.6 0 2026 05 24 34477 34477.5 2629 8 0.667 0.667 1.000 1.000 1.667 1.000 1.667 1.667 3 3 4 4 6 4 6 6 4 115 132.8 136.2 0 2026 05 25 34478 34478.5 2629 9 2.667 1.667 1.000 1.667 1.667 2.000 2.000 2.667 12 6 4 6 6 7 7 12 8 116 139.0 142.6 0 2026 05 26 34479 34479.5 2629 10 2.000 0.667 1.000 1.000 0.333 1.333 2.333 3.667 7 3 4 4 2 5 9 22 7 157 140.8 144.5 0 2026 05 27 34480 34480.5 2629 11 1.667 2.333 2.667 1.333 1.667 2.667 -1.000 -1.000 6 9 12 5 6 12 -1 -1 -1 178 -1.0 -1.0 0