# 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 11 09 00.0 01.50 34281.00000 34281.06250 1.667 6 1 2025 11 09 03.0 04.50 34281.12500 34281.18750 1.333 5 1 2025 11 09 06.0 07.50 34281.25000 34281.31250 2.333 9 1 2025 11 09 09.0 10.50 34281.37500 34281.43750 1.000 4 1 2025 11 09 12.0 13.50 34281.50000 34281.56250 2.000 7 1 2025 11 09 15.0 16.50 34281.62500 34281.68750 1.000 4 1 2025 11 09 18.0 19.50 34281.75000 34281.81250 1.000 4 1 2025 11 09 21.0 22.50 34281.87500 34281.93750 3.000 15 1 2025 11 10 00.0 01.50 34282.00000 34282.06250 2.667 12 1 2025 11 10 03.0 04.50 34282.12500 34282.18750 2.000 7 1 2025 11 10 06.0 07.50 34282.25000 34282.31250 1.000 4 1 2025 11 10 09.0 10.50 34282.37500 34282.43750 2.333 9 1 2025 11 10 12.0 13.50 34282.50000 34282.56250 2.667 12 1 2025 11 10 15.0 16.50 34282.62500 34282.68750 4.333 32 1 2025 11 10 18.0 19.50 34282.75000 34282.81250 3.000 15 1 2025 11 10 21.0 22.50 34282.87500 34282.93750 3.333 18 1 2025 11 11 00.0 01.50 34283.00000 34283.06250 1.333 5 1 2025 11 11 03.0 04.50 34283.12500 34283.18750 2.667 12 1 2025 11 11 06.0 07.50 34283.25000 34283.31250 1.000 4 1 2025 11 11 09.0 10.50 34283.37500 34283.43750 2.333 9 1 2025 11 11 12.0 13.50 34283.50000 34283.56250 0.667 3 1 2025 11 11 15.0 16.50 34283.62500 34283.68750 1.000 4 1 2025 11 11 18.0 19.50 34283.75000 34283.81250 0.333 2 1 2025 11 11 21.0 22.50 34283.87500 34283.93750 2.333 9 1 2025 11 12 00.0 01.50 34284.00000 34284.06250 8.667 300 1 2025 11 12 03.0 04.50 34284.12500 34284.18750 8.667 300 1 2025 11 12 06.0 07.50 34284.25000 34284.31250 7.000 132 1 2025 11 12 09.0 10.50 34284.37500 34284.43750 7.667 179 1 2025 11 12 12.0 13.50 34284.50000 34284.56250 5.333 56 1 2025 11 12 15.0 16.50 34284.62500 34284.68750 4.333 32 1 2025 11 12 18.0 19.50 34284.75000 34284.81250 5.667 67 1 2025 11 12 21.0 22.50 34284.87500 34284.93750 4.000 27 1 2025 11 13 00.0 01.50 34285.00000 34285.06250 6.667 111 1 2025 11 13 03.0 04.50 34285.12500 34285.18750 7.333 154 1 2025 11 13 06.0 07.50 34285.25000 34285.31250 6.333 94 1 2025 11 13 09.0 10.50 34285.37500 34285.43750 3.667 22 1 2025 11 13 12.0 13.50 34285.50000 34285.56250 4.667 39 1 2025 11 13 15.0 16.50 34285.62500 34285.68750 3.667 22 1 2025 11 13 18.0 19.50 34285.75000 34285.81250 2.667 12 1 2025 11 13 21.0 22.50 34285.87500 34285.93750 0.667 3 1 2025 11 14 00.0 01.50 34286.00000 34286.06250 0.667 3 1 2025 11 14 03.0 04.50 34286.12500 34286.18750 0.667 3 1 2025 11 14 06.0 07.50 34286.25000 34286.31250 0.667 3 1 2025 11 14 09.0 10.50 34286.37500 34286.43750 1.333 5 1 2025 11 14 12.0 13.50 34286.50000 34286.56250 1.000 4 1 2025 11 14 15.0 16.50 34286.62500 34286.68750 1.000 4 1 2025 11 14 18.0 19.50 34286.75000 34286.81250 0.333 2 1 2025 11 14 21.0 22.50 34286.87500 34286.93750 0.000 0 1 2025 11 15 00.0 01.50 34287.00000 34287.06250 1.333 5 1 2025 11 15 03.0 04.50 34287.12500 34287.18750 1.000 4 1 2025 11 15 06.0 07.50 34287.25000 34287.31250 2.000 7 1 2025 11 15 09.0 10.50 34287.37500 34287.43750 1.667 6 1 2025 11 15 12.0 13.50 34287.50000 34287.56250 1.667 6 1 2025 11 15 15.0 16.50 34287.62500 34287.68750 1.667 6 1 2025 11 15 18.0 19.50 34287.75000 34287.81250 3.333 18 1 2025 11 15 21.0 22.50 34287.87500 34287.93750 3.000 15 1 2025 11 16 00.0 01.50 34288.00000 34288.06250 3.333 18 1 2025 11 16 03.0 04.50 34288.12500 34288.18750 3.667 22 1 2025 11 16 06.0 07.50 34288.25000 34288.31250 2.667 12 1 2025 11 16 09.0 10.50 34288.37500 34288.43750 2.667 12 1 2025 11 16 12.0 13.50 34288.50000 34288.56250 3.667 22 1 2025 11 16 15.0 16.50 34288.62500 34288.68750 3.000 15 1 2025 11 16 18.0 19.50 34288.75000 34288.81250 3.000 15 1 2025 11 16 21.0 22.50 34288.87500 34288.93750 3.333 18 1 2025 11 17 00.0 01.50 34289.00000 34289.06250 3.667 22 1 2025 11 17 03.0 04.50 34289.12500 34289.18750 2.667 12 1 2025 11 17 06.0 07.50 34289.25000 34289.31250 3.000 15 1 2025 11 17 09.0 10.50 34289.37500 34289.43750 1.000 4 1 2025 11 17 12.0 13.50 34289.50000 34289.56250 2.000 7 1 2025 11 17 15.0 16.50 34289.62500 34289.68750 0.667 3 1 2025 11 17 18.0 19.50 34289.75000 34289.81250 2.000 7 1 2025 11 17 21.0 22.50 34289.87500 34289.93750 2.000 7 1 2025 11 18 00.0 01.50 34290.00000 34290.06250 2.333 9 1 2025 11 18 03.0 04.50 34290.12500 34290.18750 2.000 7 1 2025 11 18 06.0 07.50 34290.25000 34290.31250 2.000 7 1 2025 11 18 09.0 10.50 34290.37500 34290.43750 0.333 2 1 2025 11 18 12.0 13.50 34290.50000 34290.56250 0.000 0 1 2025 11 18 15.0 16.50 34290.62500 34290.68750 0.000 0 1 2025 11 18 18.0 19.50 34290.75000 34290.81250 0.000 0 1 2025 11 18 21.0 22.50 34290.87500 34290.93750 0.667 3 1 2025 11 19 00.0 01.50 34291.00000 34291.06250 0.333 2 1 2025 11 19 03.0 04.50 34291.12500 34291.18750 0.000 0 1 2025 11 19 06.0 07.50 34291.25000 34291.31250 0.667 3 1 2025 11 19 09.0 10.50 34291.37500 34291.43750 0.333 2 1 2025 11 19 12.0 13.50 34291.50000 34291.56250 0.333 2 1 2025 11 19 15.0 16.50 34291.62500 34291.68750 0.333 2 1 2025 11 19 18.0 19.50 34291.75000 34291.81250 1.000 4 1 2025 11 19 21.0 22.50 34291.87500 34291.93750 0.333 2 1 2025 11 20 00.0 01.50 34292.00000 34292.06250 0.333 2 1 2025 11 20 03.0 04.50 34292.12500 34292.18750 1.667 6 1 2025 11 20 06.0 07.50 34292.25000 34292.31250 1.000 4 1 2025 11 20 09.0 10.50 34292.37500 34292.43750 1.000 4 1 2025 11 20 12.0 13.50 34292.50000 34292.56250 0.333 2 1 2025 11 20 15.0 16.50 34292.62500 34292.68750 2.000 7 1 2025 11 20 18.0 19.50 34292.75000 34292.81250 2.667 12 1 2025 11 20 21.0 22.50 34292.87500 34292.93750 3.000 15 1 2025 11 21 00.0 01.50 34293.00000 34293.06250 2.667 12 1 2025 11 21 03.0 04.50 34293.12500 34293.18750 2.667 12 1 2025 11 21 06.0 07.50 34293.25000 34293.31250 0.667 3 1 2025 11 21 09.0 10.50 34293.37500 34293.43750 1.333 5 1 2025 11 21 12.0 13.50 34293.50000 34293.56250 1.667 6 1 2025 11 21 15.0 16.50 34293.62500 34293.68750 2.000 7 1 2025 11 21 18.0 19.50 34293.75000 34293.81250 2.000 7 1 2025 11 21 21.0 22.50 34293.87500 34293.93750 1.333 5 1 2025 11 22 00.0 01.50 34294.00000 34294.06250 2.000 7 1 2025 11 22 03.0 04.50 34294.12500 34294.18750 1.000 4 1 2025 11 22 06.0 07.50 34294.25000 34294.31250 0.667 3 1 2025 11 22 09.0 10.50 34294.37500 34294.43750 0.333 2 1 2025 11 22 12.0 13.50 34294.50000 34294.56250 1.000 4 1 2025 11 22 15.0 16.50 34294.62500 34294.68750 0.667 3 1 2025 11 22 18.0 19.50 34294.75000 34294.81250 1.667 6 1 2025 11 22 21.0 22.50 34294.87500 34294.93750 2.333 9 1 2025 11 23 00.0 01.50 34295.00000 34295.06250 2.667 12 1 2025 11 23 03.0 04.50 34295.12500 34295.18750 1.667 6 1 2025 11 23 06.0 07.50 34295.25000 34295.31250 1.667 6 1 2025 11 23 09.0 10.50 34295.37500 34295.43750 2.333 9 1 2025 11 23 12.0 13.50 34295.50000 34295.56250 3.000 15 1 2025 11 23 15.0 16.50 34295.62500 34295.68750 3.667 22 1 2025 11 23 18.0 19.50 34295.75000 34295.81250 2.667 12 1 2025 11 23 21.0 22.50 34295.87500 34295.93750 2.333 9 1 2025 11 24 00.0 01.50 34296.00000 34296.06250 3.000 15 1 2025 11 24 03.0 04.50 34296.12500 34296.18750 3.000 15 1 2025 11 24 06.0 07.50 34296.25000 34296.31250 3.333 18 1 2025 11 24 09.0 10.50 34296.37500 34296.43750 3.333 18 1 2025 11 24 12.0 13.50 34296.50000 34296.56250 4.667 39 1 2025 11 24 15.0 16.50 34296.62500 34296.68750 3.667 22 1 2025 11 24 18.0 19.50 34296.75000 34296.81250 3.333 18 1 2025 11 24 21.0 22.50 34296.87500 34296.93750 3.333 18 1 2025 11 25 00.0 01.50 34297.00000 34297.06250 4.667 39 1 2025 11 25 03.0 04.50 34297.12500 34297.18750 4.667 39 1 2025 11 25 06.0 07.50 34297.25000 34297.31250 4.333 32 1 2025 11 25 09.0 10.50 34297.37500 34297.43750 4.000 27 1 2025 11 25 12.0 13.50 34297.50000 34297.56250 4.000 27 1 2025 11 25 15.0 16.50 34297.62500 34297.68750 4.000 27 1 2025 11 25 18.0 19.50 34297.75000 34297.81250 4.000 27 1 2025 11 25 21.0 22.50 34297.87500 34297.93750 2.667 12 1 2025 11 26 00.0 01.50 34298.00000 34298.06250 2.667 12 1 2025 11 26 03.0 04.50 34298.12500 34298.18750 4.000 27 1 2025 11 26 06.0 07.50 34298.25000 34298.31250 4.333 32 1 2025 11 26 09.0 10.50 34298.37500 34298.43750 3.333 18 1 2025 11 26 12.0 13.50 34298.50000 34298.56250 4.000 27 1 2025 11 26 15.0 16.50 34298.62500 34298.68750 4.333 32 1 2025 11 26 18.0 19.50 34298.75000 34298.81250 3.333 18 1 2025 11 26 21.0 22.50 34298.87500 34298.93750 3.000 15 1 2025 11 27 00.0 01.50 34299.00000 34299.06250 2.667 12 1 2025 11 27 03.0 04.50 34299.12500 34299.18750 3.333 18 1 2025 11 27 06.0 07.50 34299.25000 34299.31250 4.000 27 1 2025 11 27 09.0 10.50 34299.37500 34299.43750 4.333 32 1 2025 11 27 12.0 13.50 34299.50000 34299.56250 4.000 27 1 2025 11 27 15.0 16.50 34299.62500 34299.68750 3.667 22 1 2025 11 27 18.0 19.50 34299.75000 34299.81250 4.333 32 1 2025 11 27 21.0 22.50 34299.87500 34299.93750 4.333 32 1 2025 11 28 00.0 01.50 34300.00000 34300.06250 3.333 18 1 2025 11 28 03.0 04.50 34300.12500 34300.18750 3.000 15 1 2025 11 28 06.0 07.50 34300.25000 34300.31250 3.667 22 1 2025 11 28 09.0 10.50 34300.37500 34300.43750 4.000 27 1 2025 11 28 12.0 13.50 34300.50000 34300.56250 3.667 22 1 2025 11 28 15.0 16.50 34300.62500 34300.68750 3.667 22 1 2025 11 28 18.0 19.50 34300.75000 34300.81250 3.333 18 1 2025 11 28 21.0 22.50 34300.87500 34300.93750 2.667 12 1 2025 11 29 00.0 01.50 34301.00000 34301.06250 2.333 9 1 2025 11 29 03.0 04.50 34301.12500 34301.18750 3.333 18 1 2025 11 29 06.0 07.50 34301.25000 34301.31250 3.667 22 1 2025 11 29 09.0 10.50 34301.37500 34301.43750 3.333 18 1 2025 11 29 12.0 13.50 34301.50000 34301.56250 4.000 27 1 2025 11 29 15.0 16.50 34301.62500 34301.68750 4.000 27 1 2025 11 29 18.0 19.50 34301.75000 34301.81250 3.000 15 1 2025 11 29 21.0 22.50 34301.87500 34301.93750 3.000 15 1 2025 11 30 00.0 01.50 34302.00000 34302.06250 3.667 22 1 2025 11 30 03.0 04.50 34302.12500 34302.18750 4.000 27 1 2025 11 30 06.0 07.50 34302.25000 34302.31250 2.333 9 1 2025 11 30 09.0 10.50 34302.37500 34302.43750 3.000 15 1 2025 11 30 12.0 13.50 34302.50000 34302.56250 1.333 5 1 2025 11 30 15.0 16.50 34302.62500 34302.68750 2.333 9 1 2025 11 30 18.0 19.50 34302.75000 34302.81250 3.000 15 1 2025 11 30 21.0 22.50 34302.87500 34302.93750 2.667 12 1 2025 12 01 00.0 01.50 34303.00000 34303.06250 4.000 27 0 2025 12 01 03.0 04.50 34303.12500 34303.18750 1.000 4 0 2025 12 01 06.0 07.50 34303.25000 34303.31250 1.667 6 0 2025 12 01 09.0 10.50 34303.37500 34303.43750 1.667 6 0 2025 12 01 12.0 13.50 34303.50000 34303.56250 2.000 7 0 2025 12 01 15.0 16.50 34303.62500 34303.68750 3.000 15 0 2025 12 01 18.0 19.50 34303.75000 34303.81250 1.667 6 0 2025 12 01 21.0 22.50 34303.87500 34303.93750 1.333 5 0 2025 12 02 00.0 01.50 34304.00000 34304.06250 2.333 9 0 2025 12 02 03.0 04.50 34304.12500 34304.18750 2.667 12 0 2025 12 02 06.0 07.50 34304.25000 34304.31250 1.000 4 0 2025 12 02 09.0 10.50 34304.37500 34304.43750 1.667 6 0 2025 12 02 12.0 13.50 34304.50000 34304.56250 1.000 4 0 2025 12 02 15.0 16.50 34304.62500 34304.68750 2.000 7 0 2025 12 02 18.0 19.50 34304.75000 34304.81250 2.667 12 0 2025 12 02 21.0 22.50 34304.87500 34304.93750 2.000 7 0 2025 12 03 00.0 01.50 34305.00000 34305.06250 1.667 6 0 2025 12 03 03.0 04.50 34305.12500 34305.18750 2.333 9 0 2025 12 03 06.0 07.50 34305.25000 34305.31250 1.667 6 0 2025 12 03 09.0 10.50 34305.37500 34305.43750 2.667 12 0 2025 12 03 12.0 13.50 34305.50000 34305.56250 4.000 27 0 2025 12 03 15.0 16.50 34305.62500 34305.68750 4.333 32 0 2025 12 03 18.0 19.50 34305.75000 34305.81250 6.667 111 0 2025 12 03 21.0 22.50 34305.87500 34305.93750 5.000 48 0 2025 12 04 00.0 01.50 34306.00000 34306.06250 5.000 48 0 2025 12 04 03.0 04.50 34306.12500 34306.18750 5.000 48 0 2025 12 04 06.0 07.50 34306.25000 34306.31250 4.667 39 0 2025 12 04 09.0 10.50 34306.37500 34306.43750 4.000 27 0 2025 12 04 12.0 13.50 34306.50000 34306.56250 4.333 32 0 2025 12 04 15.0 16.50 34306.62500 34306.68750 4.000 27 0 2025 12 04 18.0 19.50 34306.75000 34306.81250 3.667 22 0 2025 12 04 21.0 22.50 34306.87500 34306.93750 2.333 9 0 2025 12 05 00.0 01.50 34307.00000 34307.06250 3.000 15 0 2025 12 05 03.0 04.50 34307.12500 34307.18750 3.333 18 0 2025 12 05 06.0 07.50 34307.25000 34307.31250 3.333 18 0 2025 12 05 09.0 10.50 34307.37500 34307.43750 2.667 12 0 2025 12 05 12.0 13.50 34307.50000 34307.56250 2.333 9 0 2025 12 05 15.0 16.50 34307.62500 34307.68750 2.000 7 0 2025 12 05 18.0 19.50 34307.75000 34307.81250 3.333 18 0 2025 12 05 21.0 22.50 34307.87500 34307.93750 2.667 12 0 2025 12 06 00.0 01.50 34308.00000 34308.06250 3.667 22 0 2025 12 06 03.0 04.50 34308.12500 34308.18750 3.667 22 0 2025 12 06 06.0 07.50 34308.25000 34308.31250 4.333 32 0 2025 12 06 09.0 10.50 34308.37500 34308.43750 3.333 18 0 2025 12 06 12.0 13.50 34308.50000 34308.56250 3.000 15 0 2025 12 06 15.0 16.50 34308.62500 34308.68750 2.333 9 0 2025 12 06 18.0 19.50 34308.75000 34308.81250 1.667 6 0 2025 12 06 21.0 22.50 34308.87500 34308.93750 1.667 6 0 2025 12 07 00.0 01.50 34309.00000 34309.06250 2.333 9 0 2025 12 07 03.0 04.50 34309.12500 34309.18750 3.667 22 0 2025 12 07 06.0 07.50 34309.25000 34309.31250 3.000 15 0 2025 12 07 09.0 10.50 34309.37500 34309.43750 2.000 7 0 2025 12 07 12.0 13.50 34309.50000 34309.56250 1.333 5 0 2025 12 07 15.0 16.50 34309.62500 34309.68750 0.000 0 0 2025 12 07 18.0 19.50 34309.75000 34309.81250 0.000 0 0 2025 12 07 21.0 22.50 34309.87500 34309.93750 0.333 2 0 2025 12 08 00.0 01.50 34310.00000 34310.06250 0.000 0 0 2025 12 08 03.0 04.50 34310.12500 34310.18750 0.000 0 0 2025 12 08 06.0 07.50 34310.25000 34310.31250 0.000 0 0 2025 12 08 09.0 10.50 34310.37500 34310.43750 0.000 0 0 2025 12 08 12.0 13.50 34310.50000 34310.56250 -1.000 -1 0 2025 12 08 15.0 16.50 34310.62500 34310.68750 -1.000 -1 0 2025 12 08 18.0 19.50 34310.75000 34310.81250 -1.000 -1 0 2025 12 08 21.0 22.50 34310.87500 34310.93750 -1.000 -1 0