# PURPOSE: This file distributes the Kp index and ap index (one line per three-hour interval) # LICENSE: CC BY 4.0 # SOURCE: Geomagnetic Observatory Niemegk, GFZ German Research 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 German Research 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 # # Short file description (for a detailed file description, see Kp_ap_Ap_SN_F107_format.txt): # 30 header lines, all starting with # # ASCII, blank separated and fixed length, missing data indicated by -1.000 for Kp and -1 for ap # YYYY MM DD is date of UT day, hh.h is starting time in hours of interval for which Kp and ap are given # hh._m is mid time in hours of interval for which Kp and ap are given # days is days since 1932-01-01 00:00 UT to start of interval, days_m is days since 1932-01-01 00:00 UT to mid of interval # Kp, ap # D indicates if the Kp and ap values are definitive (D = 1) or preliminary (D=0) # # # # # The format for each line is (i stands for integer, f for float): #iii ii ii ff.f ff.ff fffff.fffff fffff.fffff ff.fff iiii i # The parameters in each line are: #YYY MM DD hh.h hh._m days days_m Kp ap D 2024 04 12 00.0 01.50 33705.00000 33705.06250 1.333 5 1 2024 04 12 03.0 04.50 33705.12500 33705.18750 2.333 9 1 2024 04 12 06.0 07.50 33705.25000 33705.31250 1.333 5 1 2024 04 12 09.0 10.50 33705.37500 33705.43750 1.000 4 1 2024 04 12 12.0 13.50 33705.50000 33705.56250 1.000 4 1 2024 04 12 15.0 16.50 33705.62500 33705.68750 0.667 3 1 2024 04 12 18.0 19.50 33705.75000 33705.81250 0.667 3 1 2024 04 12 21.0 22.50 33705.87500 33705.93750 1.333 5 1 2024 04 13 00.0 01.50 33706.00000 33706.06250 1.333 5 1 2024 04 13 03.0 04.50 33706.12500 33706.18750 2.000 7 1 2024 04 13 06.0 07.50 33706.25000 33706.31250 0.333 2 1 2024 04 13 09.0 10.50 33706.37500 33706.43750 0.333 2 1 2024 04 13 12.0 13.50 33706.50000 33706.56250 1.667 6 1 2024 04 13 15.0 16.50 33706.62500 33706.68750 1.667 6 1 2024 04 13 18.0 19.50 33706.75000 33706.81250 1.000 4 1 2024 04 13 21.0 22.50 33706.87500 33706.93750 1.667 6 1 2024 04 14 00.0 01.50 33707.00000 33707.06250 1.667 6 1 2024 04 14 03.0 04.50 33707.12500 33707.18750 0.000 0 1 2024 04 14 06.0 07.50 33707.25000 33707.31250 1.333 5 1 2024 04 14 09.0 10.50 33707.37500 33707.43750 1.333 5 1 2024 04 14 12.0 13.50 33707.50000 33707.56250 1.333 5 1 2024 04 14 15.0 16.50 33707.62500 33707.68750 1.333 5 1 2024 04 14 18.0 19.50 33707.75000 33707.81250 1.333 5 1 2024 04 14 21.0 22.50 33707.87500 33707.93750 1.667 6 1 2024 04 15 00.0 01.50 33708.00000 33708.06250 1.333 5 1 2024 04 15 03.0 04.50 33708.12500 33708.18750 1.333 5 1 2024 04 15 06.0 07.50 33708.25000 33708.31250 0.333 2 1 2024 04 15 09.0 10.50 33708.37500 33708.43750 1.333 5 1 2024 04 15 12.0 13.50 33708.50000 33708.56250 0.667 3 1 2024 04 15 15.0 16.50 33708.62500 33708.68750 2.000 7 1 2024 04 15 18.0 19.50 33708.75000 33708.81250 2.333 9 1 2024 04 15 21.0 22.50 33708.87500 33708.93750 2.667 12 1 2024 04 16 00.0 01.50 33709.00000 33709.06250 4.000 27 1 2024 04 16 03.0 04.50 33709.12500 33709.18750 3.333 18 1 2024 04 16 06.0 07.50 33709.25000 33709.31250 4.000 27 1 2024 04 16 09.0 10.50 33709.37500 33709.43750 3.333 18 1 2024 04 16 12.0 13.50 33709.50000 33709.56250 3.333 18 1 2024 04 16 15.0 16.50 33709.62500 33709.68750 4.667 39 1 2024 04 16 18.0 19.50 33709.75000 33709.81250 5.333 56 1 2024 04 16 21.0 22.50 33709.87500 33709.93750 5.000 48 1 2024 04 17 00.0 01.50 33710.00000 33710.06250 3.000 15 1 2024 04 17 03.0 04.50 33710.12500 33710.18750 1.000 4 1 2024 04 17 06.0 07.50 33710.25000 33710.31250 0.667 3 1 2024 04 17 09.0 10.50 33710.37500 33710.43750 1.333 5 1 2024 04 17 12.0 13.50 33710.50000 33710.56250 0.667 3 1 2024 04 17 15.0 16.50 33710.62500 33710.68750 1.667 6 1 2024 04 17 18.0 19.50 33710.75000 33710.81250 1.333 5 1 2024 04 17 21.0 22.50 33710.87500 33710.93750 2.000 7 1 2024 04 18 00.0 01.50 33711.00000 33711.06250 1.333 5 1 2024 04 18 03.0 04.50 33711.12500 33711.18750 0.333 2 1 2024 04 18 06.0 07.50 33711.25000 33711.31250 0.333 2 1 2024 04 18 09.0 10.50 33711.37500 33711.43750 0.667 3 1 2024 04 18 12.0 13.50 33711.50000 33711.56250 0.667 3 1 2024 04 18 15.0 16.50 33711.62500 33711.68750 0.667 3 1 2024 04 18 18.0 19.50 33711.75000 33711.81250 0.333 2 1 2024 04 18 21.0 22.50 33711.87500 33711.93750 1.667 6 1 2024 04 19 00.0 01.50 33712.00000 33712.06250 1.667 6 1 2024 04 19 03.0 04.50 33712.12500 33712.18750 2.333 9 1 2024 04 19 06.0 07.50 33712.25000 33712.31250 4.667 39 1 2024 04 19 09.0 10.50 33712.37500 33712.43750 4.667 39 1 2024 04 19 12.0 13.50 33712.50000 33712.56250 5.000 48 1 2024 04 19 15.0 16.50 33712.62500 33712.68750 5.667 67 1 2024 04 19 18.0 19.50 33712.75000 33712.81250 7.000 132 1 2024 04 19 21.0 22.50 33712.87500 33712.93750 3.667 22 1 2024 04 20 00.0 01.50 33713.00000 33713.06250 2.000 7 1 2024 04 20 03.0 04.50 33713.12500 33713.18750 2.000 7 1 2024 04 20 06.0 07.50 33713.25000 33713.31250 2.667 12 1 2024 04 20 09.0 10.50 33713.37500 33713.43750 2.667 12 1 2024 04 20 12.0 13.50 33713.50000 33713.56250 1.667 6 1 2024 04 20 15.0 16.50 33713.62500 33713.68750 2.667 12 1 2024 04 20 18.0 19.50 33713.75000 33713.81250 2.333 9 1 2024 04 20 21.0 22.50 33713.87500 33713.93750 2.667 12 1 2024 04 21 00.0 01.50 33714.00000 33714.06250 3.333 18 1 2024 04 21 03.0 04.50 33714.12500 33714.18750 3.000 15 1 2024 04 21 06.0 07.50 33714.25000 33714.31250 2.333 9 1 2024 04 21 09.0 10.50 33714.37500 33714.43750 3.000 15 1 2024 04 21 12.0 13.50 33714.50000 33714.56250 4.000 27 1 2024 04 21 15.0 16.50 33714.62500 33714.68750 3.667 22 1 2024 04 21 18.0 19.50 33714.75000 33714.81250 3.667 22 1 2024 04 21 21.0 22.50 33714.87500 33714.93750 3.000 15 1 2024 04 22 00.0 01.50 33715.00000 33715.06250 2.000 7 1 2024 04 22 03.0 04.50 33715.12500 33715.18750 2.333 9 1 2024 04 22 06.0 07.50 33715.25000 33715.31250 2.333 9 1 2024 04 22 09.0 10.50 33715.37500 33715.43750 1.333 5 1 2024 04 22 12.0 13.50 33715.50000 33715.56250 1.333 5 1 2024 04 22 15.0 16.50 33715.62500 33715.68750 1.667 6 1 2024 04 22 18.0 19.50 33715.75000 33715.81250 1.667 6 1 2024 04 22 21.0 22.50 33715.87500 33715.93750 2.333 9 1 2024 04 23 00.0 01.50 33716.00000 33716.06250 1.333 5 1 2024 04 23 03.0 04.50 33716.12500 33716.18750 1.000 4 1 2024 04 23 06.0 07.50 33716.25000 33716.31250 1.667 6 1 2024 04 23 09.0 10.50 33716.37500 33716.43750 1.667 6 1 2024 04 23 12.0 13.50 33716.50000 33716.56250 1.667 6 1 2024 04 23 15.0 16.50 33716.62500 33716.68750 1.333 5 1 2024 04 23 18.0 19.50 33716.75000 33716.81250 2.667 12 1 2024 04 23 21.0 22.50 33716.87500 33716.93750 2.000 7 1 2024 04 24 00.0 01.50 33717.00000 33717.06250 1.000 4 1 2024 04 24 03.0 04.50 33717.12500 33717.18750 0.667 3 1 2024 04 24 06.0 07.50 33717.25000 33717.31250 0.333 2 1 2024 04 24 09.0 10.50 33717.37500 33717.43750 0.333 2 1 2024 04 24 12.0 13.50 33717.50000 33717.56250 0.667 3 1 2024 04 24 15.0 16.50 33717.62500 33717.68750 0.667 3 1 2024 04 24 18.0 19.50 33717.75000 33717.81250 0.333 2 1 2024 04 24 21.0 22.50 33717.87500 33717.93750 0.667 3 1 2024 04 25 00.0 01.50 33718.00000 33718.06250 0.000 0 1 2024 04 25 03.0 04.50 33718.12500 33718.18750 0.000 0 1 2024 04 25 06.0 07.50 33718.25000 33718.31250 0.000 0 1 2024 04 25 09.0 10.50 33718.37500 33718.43750 0.667 3 1 2024 04 25 12.0 13.50 33718.50000 33718.56250 0.667 3 1 2024 04 25 15.0 16.50 33718.62500 33718.68750 0.333 2 1 2024 04 25 18.0 19.50 33718.75000 33718.81250 0.667 3 1 2024 04 25 21.0 22.50 33718.87500 33718.93750 0.667 3 1 2024 04 26 00.0 01.50 33719.00000 33719.06250 1.000 4 1 2024 04 26 03.0 04.50 33719.12500 33719.18750 2.667 12 1 2024 04 26 06.0 07.50 33719.25000 33719.31250 3.000 15 1 2024 04 26 09.0 10.50 33719.37500 33719.43750 2.000 7 1 2024 04 26 12.0 13.50 33719.50000 33719.56250 4.000 27 1 2024 04 26 15.0 16.50 33719.62500 33719.68750 5.000 48 1 2024 04 26 18.0 19.50 33719.75000 33719.81250 3.333 18 1 2024 04 26 21.0 22.50 33719.87500 33719.93750 2.000 7 1 2024 04 27 00.0 01.50 33720.00000 33720.06250 3.333 18 1 2024 04 27 03.0 04.50 33720.12500 33720.18750 3.000 15 1 2024 04 27 06.0 07.50 33720.25000 33720.31250 1.667 6 1 2024 04 27 09.0 10.50 33720.37500 33720.43750 1.000 4 1 2024 04 27 12.0 13.50 33720.50000 33720.56250 3.333 18 1 2024 04 27 15.0 16.50 33720.62500 33720.68750 2.333 9 1 2024 04 27 18.0 19.50 33720.75000 33720.81250 3.000 15 1 2024 04 27 21.0 22.50 33720.87500 33720.93750 2.667 12 1 2024 04 28 00.0 01.50 33721.00000 33721.06250 3.667 22 1 2024 04 28 03.0 04.50 33721.12500 33721.18750 2.000 7 1 2024 04 28 06.0 07.50 33721.25000 33721.31250 1.000 4 1 2024 04 28 09.0 10.50 33721.37500 33721.43750 0.667 3 1 2024 04 28 12.0 13.50 33721.50000 33721.56250 0.667 3 1 2024 04 28 15.0 16.50 33721.62500 33721.68750 0.667 3 1 2024 04 28 18.0 19.50 33721.75000 33721.81250 0.333 2 1 2024 04 28 21.0 22.50 33721.87500 33721.93750 1.000 4 1 2024 04 29 00.0 01.50 33722.00000 33722.06250 1.667 6 1 2024 04 29 03.0 04.50 33722.12500 33722.18750 1.333 5 1 2024 04 29 06.0 07.50 33722.25000 33722.31250 1.333 5 1 2024 04 29 09.0 10.50 33722.37500 33722.43750 1.333 5 1 2024 04 29 12.0 13.50 33722.50000 33722.56250 1.333 5 1 2024 04 29 15.0 16.50 33722.62500 33722.68750 1.667 6 1 2024 04 29 18.0 19.50 33722.75000 33722.81250 2.667 12 1 2024 04 29 21.0 22.50 33722.87500 33722.93750 1.000 4 1 2024 04 30 00.0 01.50 33723.00000 33723.06250 1.667 6 1 2024 04 30 03.0 04.50 33723.12500 33723.18750 1.333 5 1 2024 04 30 06.0 07.50 33723.25000 33723.31250 0.000 0 1 2024 04 30 09.0 10.50 33723.37500 33723.43750 0.667 3 1 2024 04 30 12.0 13.50 33723.50000 33723.56250 2.667 12 1 2024 04 30 15.0 16.50 33723.62500 33723.68750 3.333 18 1 2024 04 30 18.0 19.50 33723.75000 33723.81250 4.000 27 1 2024 04 30 21.0 22.50 33723.87500 33723.93750 4.333 32 1 2024 05 01 00.0 01.50 33724.00000 33724.06250 3.667 22 0 2024 05 01 03.0 04.50 33724.12500 33724.18750 2.333 9 0 2024 05 01 06.0 07.50 33724.25000 33724.31250 1.667 6 0 2024 05 01 09.0 10.50 33724.37500 33724.43750 0.333 2 0 2024 05 01 12.0 13.50 33724.50000 33724.56250 0.667 3 0 2024 05 01 15.0 16.50 33724.62500 33724.68750 1.333 5 0 2024 05 01 18.0 19.50 33724.75000 33724.81250 2.333 9 0 2024 05 01 21.0 22.50 33724.87500 33724.93750 1.333 5 0 2024 05 02 00.0 01.50 33725.00000 33725.06250 2.333 9 0 2024 05 02 03.0 04.50 33725.12500 33725.18750 2.000 7 0 2024 05 02 06.0 07.50 33725.25000 33725.31250 2.333 9 0 2024 05 02 09.0 10.50 33725.37500 33725.43750 3.333 18 0 2024 05 02 12.0 13.50 33725.50000 33725.56250 5.000 48 0 2024 05 02 15.0 16.50 33725.62500 33725.68750 6.667 111 0 2024 05 02 18.0 19.50 33725.75000 33725.81250 6.667 111 0 2024 05 02 21.0 22.50 33725.87500 33725.93750 4.000 27 0 2024 05 03 00.0 01.50 33726.00000 33726.06250 4.000 27 0 2024 05 03 03.0 04.50 33726.12500 33726.18750 3.333 18 0 2024 05 03 06.0 07.50 33726.25000 33726.31250 1.000 4 0 2024 05 03 09.0 10.50 33726.37500 33726.43750 1.667 6 0 2024 05 03 12.0 13.50 33726.50000 33726.56250 0.333 2 0 2024 05 03 15.0 16.50 33726.62500 33726.68750 0.667 3 0 2024 05 03 18.0 19.50 33726.75000 33726.81250 1.667 6 0 2024 05 03 21.0 22.50 33726.87500 33726.93750 1.667 6 0 2024 05 04 00.0 01.50 33727.00000 33727.06250 1.000 4 0 2024 05 04 03.0 04.50 33727.12500 33727.18750 0.667 3 0 2024 05 04 06.0 07.50 33727.25000 33727.31250 0.333 2 0 2024 05 04 09.0 10.50 33727.37500 33727.43750 0.333 2 0 2024 05 04 12.0 13.50 33727.50000 33727.56250 0.667 3 0 2024 05 04 15.0 16.50 33727.62500 33727.68750 1.000 4 0 2024 05 04 18.0 19.50 33727.75000 33727.81250 1.000 4 0 2024 05 04 21.0 22.50 33727.87500 33727.93750 3.333 18 0 2024 05 05 00.0 01.50 33728.00000 33728.06250 2.000 7 0 2024 05 05 03.0 04.50 33728.12500 33728.18750 1.667 6 0 2024 05 05 06.0 07.50 33728.25000 33728.31250 2.000 7 0 2024 05 05 09.0 10.50 33728.37500 33728.43750 2.000 7 0 2024 05 05 12.0 13.50 33728.50000 33728.56250 1.000 4 0 2024 05 05 15.0 16.50 33728.62500 33728.68750 1.000 4 0 2024 05 05 18.0 19.50 33728.75000 33728.81250 3.000 15 0 2024 05 05 21.0 22.50 33728.87500 33728.93750 4.333 32 0 2024 05 06 00.0 01.50 33729.00000 33729.06250 5.333 56 0 2024 05 06 03.0 04.50 33729.12500 33729.18750 2.000 7 0 2024 05 06 06.0 07.50 33729.25000 33729.31250 2.333 9 0 2024 05 06 09.0 10.50 33729.37500 33729.43750 2.667 12 0 2024 05 06 12.0 13.50 33729.50000 33729.56250 4.000 27 0 2024 05 06 15.0 16.50 33729.62500 33729.68750 2.000 7 0 2024 05 06 18.0 19.50 33729.75000 33729.81250 2.000 7 0 2024 05 06 21.0 22.50 33729.87500 33729.93750 1.667 6 0 2024 05 07 00.0 01.50 33730.00000 33730.06250 1.333 5 0 2024 05 07 03.0 04.50 33730.12500 33730.18750 1.667 6 0 2024 05 07 06.0 07.50 33730.25000 33730.31250 1.000 4 0 2024 05 07 09.0 10.50 33730.37500 33730.43750 1.333 5 0 2024 05 07 12.0 13.50 33730.50000 33730.56250 2.000 7 0 2024 05 07 15.0 16.50 33730.62500 33730.68750 2.333 9 0 2024 05 07 18.0 19.50 33730.75000 33730.81250 1.333 5 0 2024 05 07 21.0 22.50 33730.87500 33730.93750 1.667 6 0 2024 05 08 00.0 01.50 33731.00000 33731.06250 1.000 4 0 2024 05 08 03.0 04.50 33731.12500 33731.18750 1.667 6 0 2024 05 08 06.0 07.50 33731.25000 33731.31250 1.667 6 0 2024 05 08 09.0 10.50 33731.37500 33731.43750 1.667 6 0 2024 05 08 12.0 13.50 33731.50000 33731.56250 1.667 6 0 2024 05 08 15.0 16.50 33731.62500 33731.68750 1.667 6 0 2024 05 08 18.0 19.50 33731.75000 33731.81250 0.667 3 0 2024 05 08 21.0 22.50 33731.87500 33731.93750 1.000 4 0 2024 05 09 00.0 01.50 33732.00000 33732.06250 0.667 3 0 2024 05 09 03.0 04.50 33732.12500 33732.18750 1.667 6 0 2024 05 09 06.0 07.50 33732.25000 33732.31250 0.667 3 0 2024 05 09 09.0 10.50 33732.37500 33732.43750 1.333 5 0 2024 05 09 12.0 13.50 33732.50000 33732.56250 1.000 4 0 2024 05 09 15.0 16.50 33732.62500 33732.68750 1.000 4 0 2024 05 09 18.0 19.50 33732.75000 33732.81250 2.333 9 0 2024 05 09 21.0 22.50 33732.87500 33732.93750 2.000 7 0 2024 05 10 00.0 01.50 33733.00000 33733.06250 3.000 15 0 2024 05 10 03.0 04.50 33733.12500 33733.18750 2.667 12 0 2024 05 10 06.0 07.50 33733.25000 33733.31250 3.000 15 0 2024 05 10 09.0 10.50 33733.37500 33733.43750 3.000 15 0 2024 05 10 12.0 13.50 33733.50000 33733.56250 5.000 48 0 2024 05 10 15.0 16.50 33733.62500 33733.68750 8.000 207 0 2024 05 10 18.0 19.50 33733.75000 33733.81250 8.333 236 0 2024 05 10 21.0 22.50 33733.87500 33733.93750 9.000 400 0 2024 05 11 00.0 01.50 33734.00000 33734.06250 9.000 400 0 2024 05 11 03.0 04.50 33734.12500 33734.18750 -1.000 -1 0 2024 05 11 06.0 07.50 33734.25000 33734.31250 -1.000 -1 0 2024 05 11 09.0 10.50 33734.37500 33734.43750 -1.000 -1 0 2024 05 11 12.0 13.50 33734.50000 33734.56250 -1.000 -1 0 2024 05 11 15.0 16.50 33734.62500 33734.68750 -1.000 -1 0 2024 05 11 18.0 19.50 33734.75000 33734.81250 -1.000 -1 0 2024 05 11 21.0 22.50 33734.87500 33734.93750 -1.000 -1 0