# 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 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 # # 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 2025 02 28 00.0 01.50 34027.00000 34027.06250 5.000 48 1 2025 02 28 03.0 04.50 34027.12500 34027.18750 3.667 22 1 2025 02 28 06.0 07.50 34027.25000 34027.31250 4.667 39 1 2025 02 28 09.0 10.50 34027.37500 34027.43750 4.333 32 1 2025 02 28 12.0 13.50 34027.50000 34027.56250 4.667 39 1 2025 02 28 15.0 16.50 34027.62500 34027.68750 4.333 32 1 2025 02 28 18.0 19.50 34027.75000 34027.81250 4.000 27 1 2025 02 28 21.0 22.50 34027.87500 34027.93750 2.667 12 1 2025 03 01 00.0 01.50 34028.00000 34028.06250 2.333 9 0 2025 03 01 03.0 04.50 34028.12500 34028.18750 3.667 22 0 2025 03 01 06.0 07.50 34028.25000 34028.31250 4.000 27 0 2025 03 01 09.0 10.50 34028.37500 34028.43750 3.667 22 0 2025 03 01 12.0 13.50 34028.50000 34028.56250 3.667 22 0 2025 03 01 15.0 16.50 34028.62500 34028.68750 1.667 6 0 2025 03 01 18.0 19.50 34028.75000 34028.81250 3.000 15 0 2025 03 01 21.0 22.50 34028.87500 34028.93750 3.000 15 0 2025 03 02 00.0 01.50 34029.00000 34029.06250 1.667 6 0 2025 03 02 03.0 04.50 34029.12500 34029.18750 2.000 7 0 2025 03 02 06.0 07.50 34029.25000 34029.31250 2.333 9 0 2025 03 02 09.0 10.50 34029.37500 34029.43750 1.333 5 0 2025 03 02 12.0 13.50 34029.50000 34029.56250 1.333 5 0 2025 03 02 15.0 16.50 34029.62500 34029.68750 0.333 2 0 2025 03 02 18.0 19.50 34029.75000 34029.81250 0.000 0 0 2025 03 02 21.0 22.50 34029.87500 34029.93750 0.333 2 0 2025 03 03 00.0 01.50 34030.00000 34030.06250 1.333 5 0 2025 03 03 03.0 04.50 34030.12500 34030.18750 1.000 4 0 2025 03 03 06.0 07.50 34030.25000 34030.31250 1.000 4 0 2025 03 03 09.0 10.50 34030.37500 34030.43750 1.000 4 0 2025 03 03 12.0 13.50 34030.50000 34030.56250 0.333 2 0 2025 03 03 15.0 16.50 34030.62500 34030.68750 0.667 3 0 2025 03 03 18.0 19.50 34030.75000 34030.81250 1.000 4 0 2025 03 03 21.0 22.50 34030.87500 34030.93750 1.000 4 0 2025 03 04 00.0 01.50 34031.00000 34031.06250 1.333 5 0 2025 03 04 03.0 04.50 34031.12500 34031.18750 2.333 9 0 2025 03 04 06.0 07.50 34031.25000 34031.31250 1.667 6 0 2025 03 04 09.0 10.50 34031.37500 34031.43750 1.333 5 0 2025 03 04 12.0 13.50 34031.50000 34031.56250 1.667 6 0 2025 03 04 15.0 16.50 34031.62500 34031.68750 1.667 6 0 2025 03 04 18.0 19.50 34031.75000 34031.81250 2.667 12 0 2025 03 04 21.0 22.50 34031.87500 34031.93750 4.667 39 0 2025 03 05 00.0 01.50 34032.00000 34032.06250 3.667 22 0 2025 03 05 03.0 04.50 34032.12500 34032.18750 3.000 15 0 2025 03 05 06.0 07.50 34032.25000 34032.31250 2.333 9 0 2025 03 05 09.0 10.50 34032.37500 34032.43750 2.333 9 0 2025 03 05 12.0 13.50 34032.50000 34032.56250 1.667 6 0 2025 03 05 15.0 16.50 34032.62500 34032.68750 2.667 12 0 2025 03 05 18.0 19.50 34032.75000 34032.81250 1.667 6 0 2025 03 05 21.0 22.50 34032.87500 34032.93750 2.333 9 0 2025 03 06 00.0 01.50 34033.00000 34033.06250 2.333 9 0 2025 03 06 03.0 04.50 34033.12500 34033.18750 1.333 5 0 2025 03 06 06.0 07.50 34033.25000 34033.31250 2.333 9 0 2025 03 06 09.0 10.50 34033.37500 34033.43750 1.667 6 0 2025 03 06 12.0 13.50 34033.50000 34033.56250 0.667 3 0 2025 03 06 15.0 16.50 34033.62500 34033.68750 1.333 5 0 2025 03 06 18.0 19.50 34033.75000 34033.81250 2.333 9 0 2025 03 06 21.0 22.50 34033.87500 34033.93750 1.333 5 0 2025 03 07 00.0 01.50 34034.00000 34034.06250 1.000 4 0 2025 03 07 03.0 04.50 34034.12500 34034.18750 2.667 12 0 2025 03 07 06.0 07.50 34034.25000 34034.31250 2.333 9 0 2025 03 07 09.0 10.50 34034.37500 34034.43750 3.000 15 0 2025 03 07 12.0 13.50 34034.50000 34034.56250 2.000 7 0 2025 03 07 15.0 16.50 34034.62500 34034.68750 2.667 12 0 2025 03 07 18.0 19.50 34034.75000 34034.81250 2.000 7 0 2025 03 07 21.0 22.50 34034.87500 34034.93750 1.000 4 0 2025 03 08 00.0 01.50 34035.00000 34035.06250 1.667 6 0 2025 03 08 03.0 04.50 34035.12500 34035.18750 3.000 15 0 2025 03 08 06.0 07.50 34035.25000 34035.31250 3.000 15 0 2025 03 08 09.0 10.50 34035.37500 34035.43750 3.333 18 0 2025 03 08 12.0 13.50 34035.50000 34035.56250 2.333 9 0 2025 03 08 15.0 16.50 34035.62500 34035.68750 3.333 18 0 2025 03 08 18.0 19.50 34035.75000 34035.81250 4.667 39 0 2025 03 08 21.0 22.50 34035.87500 34035.93750 4.667 39 0 2025 03 09 00.0 01.50 34036.00000 34036.06250 5.000 48 0 2025 03 09 03.0 04.50 34036.12500 34036.18750 5.667 67 0 2025 03 09 06.0 07.50 34036.25000 34036.31250 4.000 27 0 2025 03 09 09.0 10.50 34036.37500 34036.43750 5.000 48 0 2025 03 09 12.0 13.50 34036.50000 34036.56250 4.000 27 0 2025 03 09 15.0 16.50 34036.62500 34036.68750 2.667 12 0 2025 03 09 18.0 19.50 34036.75000 34036.81250 2.667 12 0 2025 03 09 21.0 22.50 34036.87500 34036.93750 3.333 18 0 2025 03 10 00.0 01.50 34037.00000 34037.06250 2.667 12 0 2025 03 10 03.0 04.50 34037.12500 34037.18750 2.000 7 0 2025 03 10 06.0 07.50 34037.25000 34037.31250 2.000 7 0 2025 03 10 09.0 10.50 34037.37500 34037.43750 2.333 9 0 2025 03 10 12.0 13.50 34037.50000 34037.56250 2.333 9 0 2025 03 10 15.0 16.50 34037.62500 34037.68750 2.667 12 0 2025 03 10 18.0 19.50 34037.75000 34037.81250 1.333 5 0 2025 03 10 21.0 22.50 34037.87500 34037.93750 2.000 7 0 2025 03 11 00.0 01.50 34038.00000 34038.06250 2.000 7 0 2025 03 11 03.0 04.50 34038.12500 34038.18750 2.333 9 0 2025 03 11 06.0 07.50 34038.25000 34038.31250 2.000 7 0 2025 03 11 09.0 10.50 34038.37500 34038.43750 2.333 9 0 2025 03 11 12.0 13.50 34038.50000 34038.56250 2.333 9 0 2025 03 11 15.0 16.50 34038.62500 34038.68750 1.667 6 0 2025 03 11 18.0 19.50 34038.75000 34038.81250 1.333 5 0 2025 03 11 21.0 22.50 34038.87500 34038.93750 2.667 12 0 2025 03 12 00.0 01.50 34039.00000 34039.06250 4.000 27 0 2025 03 12 03.0 04.50 34039.12500 34039.18750 3.333 18 0 2025 03 12 06.0 07.50 34039.25000 34039.31250 3.000 15 0 2025 03 12 09.0 10.50 34039.37500 34039.43750 4.000 27 0 2025 03 12 12.0 13.50 34039.50000 34039.56250 4.000 27 0 2025 03 12 15.0 16.50 34039.62500 34039.68750 5.000 48 0 2025 03 12 18.0 19.50 34039.75000 34039.81250 5.000 48 0 2025 03 12 21.0 22.50 34039.87500 34039.93750 4.667 39 0 2025 03 13 00.0 01.50 34040.00000 34040.06250 5.000 48 0 2025 03 13 03.0 04.50 34040.12500 34040.18750 4.667 39 0 2025 03 13 06.0 07.50 34040.25000 34040.31250 4.333 32 0 2025 03 13 09.0 10.50 34040.37500 34040.43750 4.000 27 0 2025 03 13 12.0 13.50 34040.50000 34040.56250 4.667 39 0 2025 03 13 15.0 16.50 34040.62500 34040.68750 3.667 22 0 2025 03 13 18.0 19.50 34040.75000 34040.81250 4.667 39 0 2025 03 13 21.0 22.50 34040.87500 34040.93750 4.000 27 0 2025 03 14 00.0 01.50 34041.00000 34041.06250 5.333 56 0 2025 03 14 03.0 04.50 34041.12500 34041.18750 3.000 15 0 2025 03 14 06.0 07.50 34041.25000 34041.31250 3.333 18 0 2025 03 14 09.0 10.50 34041.37500 34041.43750 3.000 15 0 2025 03 14 12.0 13.50 34041.50000 34041.56250 3.333 18 0 2025 03 14 15.0 16.50 34041.62500 34041.68750 3.667 22 0 2025 03 14 18.0 19.50 34041.75000 34041.81250 2.667 12 0 2025 03 14 21.0 22.50 34041.87500 34041.93750 3.333 18 0 2025 03 15 00.0 01.50 34042.00000 34042.06250 4.000 27 0 2025 03 15 03.0 04.50 34042.12500 34042.18750 3.667 22 0 2025 03 15 06.0 07.50 34042.25000 34042.31250 3.667 22 0 2025 03 15 09.0 10.50 34042.37500 34042.43750 3.667 22 0 2025 03 15 12.0 13.50 34042.50000 34042.56250 3.333 18 0 2025 03 15 15.0 16.50 34042.62500 34042.68750 3.000 15 0 2025 03 15 18.0 19.50 34042.75000 34042.81250 1.000 4 0 2025 03 15 21.0 22.50 34042.87500 34042.93750 0.667 3 0 2025 03 16 00.0 01.50 34043.00000 34043.06250 2.000 7 0 2025 03 16 03.0 04.50 34043.12500 34043.18750 2.000 7 0 2025 03 16 06.0 07.50 34043.25000 34043.31250 2.000 7 0 2025 03 16 09.0 10.50 34043.37500 34043.43750 2.333 9 0 2025 03 16 12.0 13.50 34043.50000 34043.56250 3.333 18 0 2025 03 16 15.0 16.50 34043.62500 34043.68750 1.000 4 0 2025 03 16 18.0 19.50 34043.75000 34043.81250 2.000 7 0 2025 03 16 21.0 22.50 34043.87500 34043.93750 2.667 12 0 2025 03 17 00.0 01.50 34044.00000 34044.06250 3.000 15 0 2025 03 17 03.0 04.50 34044.12500 34044.18750 3.333 18 0 2025 03 17 06.0 07.50 34044.25000 34044.31250 2.667 12 0 2025 03 17 09.0 10.50 34044.37500 34044.43750 1.667 6 0 2025 03 17 12.0 13.50 34044.50000 34044.56250 3.000 15 0 2025 03 17 15.0 16.50 34044.62500 34044.68750 3.000 15 0 2025 03 17 18.0 19.50 34044.75000 34044.81250 3.333 18 0 2025 03 17 21.0 22.50 34044.87500 34044.93750 2.667 12 0 2025 03 18 00.0 01.50 34045.00000 34045.06250 3.333 18 0 2025 03 18 03.0 04.50 34045.12500 34045.18750 3.333 18 0 2025 03 18 06.0 07.50 34045.25000 34045.31250 2.333 9 0 2025 03 18 09.0 10.50 34045.37500 34045.43750 2.333 9 0 2025 03 18 12.0 13.50 34045.50000 34045.56250 3.000 15 0 2025 03 18 15.0 16.50 34045.62500 34045.68750 3.000 15 0 2025 03 18 18.0 19.50 34045.75000 34045.81250 1.667 6 0 2025 03 18 21.0 22.50 34045.87500 34045.93750 2.333 9 0 2025 03 19 00.0 01.50 34046.00000 34046.06250 2.333 9 0 2025 03 19 03.0 04.50 34046.12500 34046.18750 4.000 27 0 2025 03 19 06.0 07.50 34046.25000 34046.31250 4.000 27 0 2025 03 19 09.0 10.50 34046.37500 34046.43750 2.667 12 0 2025 03 19 12.0 13.50 34046.50000 34046.56250 3.000 15 0 2025 03 19 15.0 16.50 34046.62500 34046.68750 3.333 18 0 2025 03 19 18.0 19.50 34046.75000 34046.81250 4.667 39 0 2025 03 19 21.0 22.50 34046.87500 34046.93750 3.000 15 0 2025 03 20 00.0 01.50 34047.00000 34047.06250 2.000 7 0 2025 03 20 03.0 04.50 34047.12500 34047.18750 1.667 6 0 2025 03 20 06.0 07.50 34047.25000 34047.31250 2.000 7 0 2025 03 20 09.0 10.50 34047.37500 34047.43750 0.667 3 0 2025 03 20 12.0 13.50 34047.50000 34047.56250 1.333 5 0 2025 03 20 15.0 16.50 34047.62500 34047.68750 0.333 2 0 2025 03 20 18.0 19.50 34047.75000 34047.81250 1.000 4 0 2025 03 20 21.0 22.50 34047.87500 34047.93750 2.000 7 0 2025 03 21 00.0 01.50 34048.00000 34048.06250 3.333 18 0 2025 03 21 03.0 04.50 34048.12500 34048.18750 3.000 15 0 2025 03 21 06.0 07.50 34048.25000 34048.31250 1.667 6 0 2025 03 21 09.0 10.50 34048.37500 34048.43750 1.667 6 0 2025 03 21 12.0 13.50 34048.50000 34048.56250 2.333 9 0 2025 03 21 15.0 16.50 34048.62500 34048.68750 4.000 27 0 2025 03 21 18.0 19.50 34048.75000 34048.81250 5.333 56 0 2025 03 21 21.0 22.50 34048.87500 34048.93750 4.667 39 0 2025 03 22 00.0 01.50 34049.00000 34049.06250 5.667 67 0 2025 03 22 03.0 04.50 34049.12500 34049.18750 5.000 48 0 2025 03 22 06.0 07.50 34049.25000 34049.31250 3.000 15 0 2025 03 22 09.0 10.50 34049.37500 34049.43750 2.333 9 0 2025 03 22 12.0 13.50 34049.50000 34049.56250 3.667 22 0 2025 03 22 15.0 16.50 34049.62500 34049.68750 4.000 27 0 2025 03 22 18.0 19.50 34049.75000 34049.81250 3.667 22 0 2025 03 22 21.0 22.50 34049.87500 34049.93750 4.000 27 0 2025 03 23 00.0 01.50 34050.00000 34050.06250 4.000 27 0 2025 03 23 03.0 04.50 34050.12500 34050.18750 2.000 7 0 2025 03 23 06.0 07.50 34050.25000 34050.31250 2.667 12 0 2025 03 23 09.0 10.50 34050.37500 34050.43750 1.667 6 0 2025 03 23 12.0 13.50 34050.50000 34050.56250 2.000 7 0 2025 03 23 15.0 16.50 34050.62500 34050.68750 1.000 4 0 2025 03 23 18.0 19.50 34050.75000 34050.81250 1.667 6 0 2025 03 23 21.0 22.50 34050.87500 34050.93750 1.333 5 0 2025 03 24 00.0 01.50 34051.00000 34051.06250 4.000 27 0 2025 03 24 03.0 04.50 34051.12500 34051.18750 4.333 32 0 2025 03 24 06.0 07.50 34051.25000 34051.31250 2.667 12 0 2025 03 24 09.0 10.50 34051.37500 34051.43750 3.333 18 0 2025 03 24 12.0 13.50 34051.50000 34051.56250 3.667 22 0 2025 03 24 15.0 16.50 34051.62500 34051.68750 3.333 18 0 2025 03 24 18.0 19.50 34051.75000 34051.81250 2.667 12 0 2025 03 24 21.0 22.50 34051.87500 34051.93750 1.667 6 0 2025 03 25 00.0 01.50 34052.00000 34052.06250 3.333 18 0 2025 03 25 03.0 04.50 34052.12500 34052.18750 2.667 12 0 2025 03 25 06.0 07.50 34052.25000 34052.31250 2.667 12 0 2025 03 25 09.0 10.50 34052.37500 34052.43750 3.000 15 0 2025 03 25 12.0 13.50 34052.50000 34052.56250 2.000 7 0 2025 03 25 15.0 16.50 34052.62500 34052.68750 2.333 9 0 2025 03 25 18.0 19.50 34052.75000 34052.81250 4.000 27 0 2025 03 25 21.0 22.50 34052.87500 34052.93750 3.333 18 0 2025 03 26 00.0 01.50 34053.00000 34053.06250 4.333 32 0 2025 03 26 03.0 04.50 34053.12500 34053.18750 4.333 32 0 2025 03 26 06.0 07.50 34053.25000 34053.31250 2.333 9 0 2025 03 26 09.0 10.50 34053.37500 34053.43750 3.333 18 0 2025 03 26 12.0 13.50 34053.50000 34053.56250 5.667 67 0 2025 03 26 15.0 16.50 34053.62500 34053.68750 5.667 67 0 2025 03 26 18.0 19.50 34053.75000 34053.81250 6.000 80 0 2025 03 26 21.0 22.50 34053.87500 34053.93750 4.667 39 0 2025 03 27 00.0 01.50 34054.00000 34054.06250 3.667 22 0 2025 03 27 03.0 04.50 34054.12500 34054.18750 4.667 39 0 2025 03 27 06.0 07.50 34054.25000 34054.31250 4.667 39 0 2025 03 27 09.0 10.50 34054.37500 34054.43750 4.000 27 0 2025 03 27 12.0 13.50 34054.50000 34054.56250 4.667 39 0 2025 03 27 15.0 16.50 34054.62500 34054.68750 4.667 39 0 2025 03 27 18.0 19.50 34054.75000 34054.81250 3.333 18 0 2025 03 27 21.0 22.50 34054.87500 34054.93750 3.667 22 0 2025 03 28 00.0 01.50 34055.00000 34055.06250 2.333 9 0 2025 03 28 03.0 04.50 34055.12500 34055.18750 3.000 15 0 2025 03 28 06.0 07.50 34055.25000 34055.31250 2.667 12 0 2025 03 28 09.0 10.50 34055.37500 34055.43750 2.000 7 0 2025 03 28 12.0 13.50 34055.50000 34055.56250 2.333 9 0 2025 03 28 15.0 16.50 34055.62500 34055.68750 3.000 15 0 2025 03 28 18.0 19.50 34055.75000 34055.81250 3.000 15 0 2025 03 28 21.0 22.50 34055.87500 34055.93750 4.000 27 0 2025 03 29 00.0 01.50 34056.00000 34056.06250 3.000 15 0 2025 03 29 03.0 04.50 34056.12500 34056.18750 3.667 22 0 2025 03 29 06.0 07.50 34056.25000 34056.31250 1.333 5 0 2025 03 29 09.0 10.50 34056.37500 34056.43750 -1.000 -1 0 2025 03 29 12.0 13.50 34056.50000 34056.56250 -1.000 -1 0 2025 03 29 15.0 16.50 34056.62500 34056.68750 -1.000 -1 0 2025 03 29 18.0 19.50 34056.75000 34056.81250 -1.000 -1 0 2025 03 29 21.0 22.50 34056.87500 34056.93750 -1.000 -1 0