# 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 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 0.000 0 0 2025 12 08 15.0 16.50 34310.62500 34310.68750 0.000 0 0 2025 12 08 18.0 19.50 34310.75000 34310.81250 0.667 3 0 2025 12 08 21.0 22.50 34310.87500 34310.93750 0.333 2 0 2025 12 09 00.0 01.50 34311.00000 34311.06250 0.667 3 0 2025 12 09 03.0 04.50 34311.12500 34311.18750 0.000 0 0 2025 12 09 06.0 07.50 34311.25000 34311.31250 0.667 3 0 2025 12 09 09.0 10.50 34311.37500 34311.43750 1.000 4 0 2025 12 09 12.0 13.50 34311.50000 34311.56250 1.000 4 0 2025 12 09 15.0 16.50 34311.62500 34311.68750 1.333 5 0 2025 12 09 18.0 19.50 34311.75000 34311.81250 1.333 5 0 2025 12 09 21.0 22.50 34311.87500 34311.93750 1.333 5 0 2025 12 10 00.0 01.50 34312.00000 34312.06250 2.000 7 0 2025 12 10 03.0 04.50 34312.12500 34312.18750 2.667 12 0 2025 12 10 06.0 07.50 34312.25000 34312.31250 3.667 22 0 2025 12 10 09.0 10.50 34312.37500 34312.43750 2.000 7 0 2025 12 10 12.0 13.50 34312.50000 34312.56250 2.000 7 0 2025 12 10 15.0 16.50 34312.62500 34312.68750 2.333 9 0 2025 12 10 18.0 19.50 34312.75000 34312.81250 3.333 18 0 2025 12 10 21.0 22.50 34312.87500 34312.93750 6.333 94 0 2025 12 11 00.0 01.50 34313.00000 34313.06250 6.000 80 0 2025 12 11 03.0 04.50 34313.12500 34313.18750 4.333 32 0 2025 12 11 06.0 07.50 34313.25000 34313.31250 2.333 9 0 2025 12 11 09.0 10.50 34313.37500 34313.43750 2.000 7 0 2025 12 11 12.0 13.50 34313.50000 34313.56250 2.000 7 0 2025 12 11 15.0 16.50 34313.62500 34313.68750 3.667 22 0 2025 12 11 18.0 19.50 34313.75000 34313.81250 4.333 32 0 2025 12 11 21.0 22.50 34313.87500 34313.93750 3.333 18 0 2025 12 12 00.0 01.50 34314.00000 34314.06250 4.000 27 0 2025 12 12 03.0 04.50 34314.12500 34314.18750 4.000 27 0 2025 12 12 06.0 07.50 34314.25000 34314.31250 3.000 15 0 2025 12 12 09.0 10.50 34314.37500 34314.43750 3.000 15 0 2025 12 12 12.0 13.50 34314.50000 34314.56250 3.000 15 0 2025 12 12 15.0 16.50 34314.62500 34314.68750 4.000 27 0 2025 12 12 18.0 19.50 34314.75000 34314.81250 5.333 56 0 2025 12 12 21.0 22.50 34314.87500 34314.93750 5.000 48 0 2025 12 13 00.0 01.50 34315.00000 34315.06250 4.667 39 0 2025 12 13 03.0 04.50 34315.12500 34315.18750 2.333 9 0 2025 12 13 06.0 07.50 34315.25000 34315.31250 2.333 9 0 2025 12 13 09.0 10.50 34315.37500 34315.43750 2.667 12 0 2025 12 13 12.0 13.50 34315.50000 34315.56250 2.333 9 0 2025 12 13 15.0 16.50 34315.62500 34315.68750 2.333 9 0 2025 12 13 18.0 19.50 34315.75000 34315.81250 3.333 18 0 2025 12 13 21.0 22.50 34315.87500 34315.93750 2.667 12 0 2025 12 14 00.0 01.50 34316.00000 34316.06250 3.000 15 0 2025 12 14 03.0 04.50 34316.12500 34316.18750 2.333 9 0 2025 12 14 06.0 07.50 34316.25000 34316.31250 1.000 4 0 2025 12 14 09.0 10.50 34316.37500 34316.43750 2.000 7 0 2025 12 14 12.0 13.50 34316.50000 34316.56250 1.000 4 0 2025 12 14 15.0 16.50 34316.62500 34316.68750 0.667 3 0 2025 12 14 18.0 19.50 34316.75000 34316.81250 1.667 6 0 2025 12 14 21.0 22.50 34316.87500 34316.93750 1.000 4 0 2025 12 15 00.0 01.50 34317.00000 34317.06250 0.667 3 0 2025 12 15 03.0 04.50 34317.12500 34317.18750 0.000 0 0 2025 12 15 06.0 07.50 34317.25000 34317.31250 1.000 4 0 2025 12 15 09.0 10.50 34317.37500 34317.43750 1.667 6 0 2025 12 15 12.0 13.50 34317.50000 34317.56250 3.000 15 0 2025 12 15 15.0 16.50 34317.62500 34317.68750 1.333 5 0 2025 12 15 18.0 19.50 34317.75000 34317.81250 0.333 2 0 2025 12 15 21.0 22.50 34317.87500 34317.93750 1.000 4 0 2025 12 16 00.0 01.50 34318.00000 34318.06250 3.000 15 0 2025 12 16 03.0 04.50 34318.12500 34318.18750 2.333 9 0 2025 12 16 06.0 07.50 34318.25000 34318.31250 2.000 7 0 2025 12 16 09.0 10.50 34318.37500 34318.43750 2.000 7 0 2025 12 16 12.0 13.50 34318.50000 34318.56250 2.000 7 0 2025 12 16 15.0 16.50 34318.62500 34318.68750 3.333 18 0 2025 12 16 18.0 19.50 34318.75000 34318.81250 2.667 12 0 2025 12 16 21.0 22.50 34318.87500 34318.93750 2.667 12 0 2025 12 17 00.0 01.50 34319.00000 34319.06250 2.667 12 0 2025 12 17 03.0 04.50 34319.12500 34319.18750 3.000 15 0 2025 12 17 06.0 07.50 34319.25000 34319.31250 3.000 15 0 2025 12 17 09.0 10.50 34319.37500 34319.43750 2.333 9 0 2025 12 17 12.0 13.50 34319.50000 34319.56250 2.667 12 0 2025 12 17 15.0 16.50 34319.62500 34319.68750 3.000 15 0 2025 12 17 18.0 19.50 34319.75000 34319.81250 3.667 22 0 2025 12 17 21.0 22.50 34319.87500 34319.93750 4.667 39 0 2025 12 18 00.0 01.50 34320.00000 34320.06250 4.333 32 0 2025 12 18 03.0 04.50 34320.12500 34320.18750 2.667 12 0 2025 12 18 06.0 07.50 34320.25000 34320.31250 3.667 22 0 2025 12 18 09.0 10.50 34320.37500 34320.43750 3.333 18 0 2025 12 18 12.0 13.50 34320.50000 34320.56250 2.000 7 0 2025 12 18 15.0 16.50 34320.62500 34320.68750 3.333 18 0 2025 12 18 18.0 19.50 34320.75000 34320.81250 3.000 15 0 2025 12 18 21.0 22.50 34320.87500 34320.93750 2.667 12 0 2025 12 19 00.0 01.50 34321.00000 34321.06250 2.333 9 0 2025 12 19 03.0 04.50 34321.12500 34321.18750 2.000 7 0 2025 12 19 06.0 07.50 34321.25000 34321.31250 1.333 5 0 2025 12 19 09.0 10.50 34321.37500 34321.43750 1.000 4 0 2025 12 19 12.0 13.50 34321.50000 34321.56250 1.000 4 0 2025 12 19 15.0 16.50 34321.62500 34321.68750 1.333 5 0 2025 12 19 18.0 19.50 34321.75000 34321.81250 2.000 7 0 2025 12 19 21.0 22.50 34321.87500 34321.93750 2.000 7 0 2025 12 20 00.0 01.50 34322.00000 34322.06250 1.667 6 0 2025 12 20 03.0 04.50 34322.12500 34322.18750 0.667 3 0 2025 12 20 06.0 07.50 34322.25000 34322.31250 1.333 5 0 2025 12 20 09.0 10.50 34322.37500 34322.43750 1.000 4 0 2025 12 20 12.0 13.50 34322.50000 34322.56250 1.333 5 0 2025 12 20 15.0 16.50 34322.62500 34322.68750 2.000 7 0 2025 12 20 18.0 19.50 34322.75000 34322.81250 1.333 5 0 2025 12 20 21.0 22.50 34322.87500 34322.93750 1.667 6 0 2025 12 21 00.0 01.50 34323.00000 34323.06250 3.667 22 0 2025 12 21 03.0 04.50 34323.12500 34323.18750 2.667 12 0 2025 12 21 06.0 07.50 34323.25000 34323.31250 3.000 15 0 2025 12 21 09.0 10.50 34323.37500 34323.43750 3.667 22 0 2025 12 21 12.0 13.50 34323.50000 34323.56250 4.667 39 0 2025 12 21 15.0 16.50 34323.62500 34323.68750 4.667 39 0 2025 12 21 18.0 19.50 34323.75000 34323.81250 3.667 22 0 2025 12 21 21.0 22.50 34323.87500 34323.93750 5.000 48 0 2025 12 22 00.0 01.50 34324.00000 34324.06250 3.333 18 0 2025 12 22 03.0 04.50 34324.12500 34324.18750 3.333 18 0 2025 12 22 06.0 07.50 34324.25000 34324.31250 3.667 22 0 2025 12 22 09.0 10.50 34324.37500 34324.43750 3.333 18 0 2025 12 22 12.0 13.50 34324.50000 34324.56250 4.667 39 0 2025 12 22 15.0 16.50 34324.62500 34324.68750 3.667 22 0 2025 12 22 18.0 19.50 34324.75000 34324.81250 4.000 27 0 2025 12 22 21.0 22.50 34324.87500 34324.93750 4.000 27 0 2025 12 23 00.0 01.50 34325.00000 34325.06250 3.000 15 0 2025 12 23 03.0 04.50 34325.12500 34325.18750 3.667 22 0 2025 12 23 06.0 07.50 34325.25000 34325.31250 3.667 22 0 2025 12 23 09.0 10.50 34325.37500 34325.43750 3.333 18 0 2025 12 23 12.0 13.50 34325.50000 34325.56250 3.333 18 0 2025 12 23 15.0 16.50 34325.62500 34325.68750 3.667 22 0 2025 12 23 18.0 19.50 34325.75000 34325.81250 4.000 27 0 2025 12 23 21.0 22.50 34325.87500 34325.93750 4.000 27 0 2025 12 24 00.0 01.50 34326.00000 34326.06250 3.667 22 0 2025 12 24 03.0 04.50 34326.12500 34326.18750 4.333 32 0 2025 12 24 06.0 07.50 34326.25000 34326.31250 3.667 22 0 2025 12 24 09.0 10.50 34326.37500 34326.43750 3.000 15 0 2025 12 24 12.0 13.50 34326.50000 34326.56250 3.333 18 0 2025 12 24 15.0 16.50 34326.62500 34326.68750 3.333 18 0 2025 12 24 18.0 19.50 34326.75000 34326.81250 3.000 15 0 2025 12 24 21.0 22.50 34326.87500 34326.93750 3.000 15 0 2025 12 25 00.0 01.50 34327.00000 34327.06250 2.667 12 0 2025 12 25 03.0 04.50 34327.12500 34327.18750 -1.000 -1 0 2025 12 25 06.0 07.50 34327.25000 34327.31250 -1.000 -1 0 2025 12 25 09.0 10.50 34327.37500 34327.43750 -1.000 -1 0 2025 12 25 12.0 13.50 34327.50000 34327.56250 -1.000 -1 0 2025 12 25 15.0 16.50 34327.62500 34327.68750 -1.000 -1 0 2025 12 25 18.0 19.50 34327.75000 34327.81250 -1.000 -1 0 2025 12 25 21.0 22.50 34327.87500 34327.93750 -1.000 -1 0