# 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 09 13 00.0 01.50 33859.00000 33859.06250 5.333 56 1 2024 09 13 03.0 04.50 33859.12500 33859.18750 4.333 32 1 2024 09 13 06.0 07.50 33859.25000 33859.31250 4.000 27 1 2024 09 13 09.0 10.50 33859.37500 33859.43750 3.333 18 1 2024 09 13 12.0 13.50 33859.50000 33859.56250 3.333 18 1 2024 09 13 15.0 16.50 33859.62500 33859.68750 3.667 22 1 2024 09 13 18.0 19.50 33859.75000 33859.81250 4.000 27 1 2024 09 13 21.0 22.50 33859.87500 33859.93750 6.000 80 1 2024 09 14 00.0 01.50 33860.00000 33860.06250 4.000 27 1 2024 09 14 03.0 04.50 33860.12500 33860.18750 3.667 22 1 2024 09 14 06.0 07.50 33860.25000 33860.31250 2.000 7 1 2024 09 14 09.0 10.50 33860.37500 33860.43750 4.000 27 1 2024 09 14 12.0 13.50 33860.50000 33860.56250 4.333 32 1 2024 09 14 15.0 16.50 33860.62500 33860.68750 1.667 6 1 2024 09 14 18.0 19.50 33860.75000 33860.81250 2.667 12 1 2024 09 14 21.0 22.50 33860.87500 33860.93750 3.000 15 1 2024 09 15 00.0 01.50 33861.00000 33861.06250 1.667 6 1 2024 09 15 03.0 04.50 33861.12500 33861.18750 4.000 27 1 2024 09 15 06.0 07.50 33861.25000 33861.31250 4.000 27 1 2024 09 15 09.0 10.50 33861.37500 33861.43750 3.333 18 1 2024 09 15 12.0 13.50 33861.50000 33861.56250 3.667 22 1 2024 09 15 15.0 16.50 33861.62500 33861.68750 3.667 22 1 2024 09 15 18.0 19.50 33861.75000 33861.81250 2.333 9 1 2024 09 15 21.0 22.50 33861.87500 33861.93750 2.000 7 1 2024 09 16 00.0 01.50 33862.00000 33862.06250 3.333 18 1 2024 09 16 03.0 04.50 33862.12500 33862.18750 4.000 27 1 2024 09 16 06.0 07.50 33862.25000 33862.31250 3.667 22 1 2024 09 16 09.0 10.50 33862.37500 33862.43750 3.667 22 1 2024 09 16 12.0 13.50 33862.50000 33862.56250 3.667 22 1 2024 09 16 15.0 16.50 33862.62500 33862.68750 2.333 9 1 2024 09 16 18.0 19.50 33862.75000 33862.81250 1.667 6 1 2024 09 16 21.0 22.50 33862.87500 33862.93750 4.000 27 1 2024 09 17 00.0 01.50 33863.00000 33863.06250 7.333 154 1 2024 09 17 03.0 04.50 33863.12500 33863.18750 7.000 132 1 2024 09 17 06.0 07.50 33863.25000 33863.31250 5.333 56 1 2024 09 17 09.0 10.50 33863.37500 33863.43750 6.333 94 1 2024 09 17 12.0 13.50 33863.50000 33863.56250 5.333 56 1 2024 09 17 15.0 16.50 33863.62500 33863.68750 4.333 32 1 2024 09 17 18.0 19.50 33863.75000 33863.81250 3.333 18 1 2024 09 17 21.0 22.50 33863.87500 33863.93750 4.000 27 1 2024 09 18 00.0 01.50 33864.00000 33864.06250 3.667 22 1 2024 09 18 03.0 04.50 33864.12500 33864.18750 2.000 7 1 2024 09 18 06.0 07.50 33864.25000 33864.31250 1.000 4 1 2024 09 18 09.0 10.50 33864.37500 33864.43750 2.000 7 1 2024 09 18 12.0 13.50 33864.50000 33864.56250 2.000 7 1 2024 09 18 15.0 16.50 33864.62500 33864.68750 2.667 12 1 2024 09 18 18.0 19.50 33864.75000 33864.81250 1.667 6 1 2024 09 18 21.0 22.50 33864.87500 33864.93750 3.667 22 1 2024 09 19 00.0 01.50 33865.00000 33865.06250 4.333 32 1 2024 09 19 03.0 04.50 33865.12500 33865.18750 2.667 12 1 2024 09 19 06.0 07.50 33865.25000 33865.31250 2.000 7 1 2024 09 19 09.0 10.50 33865.37500 33865.43750 3.333 18 1 2024 09 19 12.0 13.50 33865.50000 33865.56250 3.667 22 1 2024 09 19 15.0 16.50 33865.62500 33865.68750 4.333 32 1 2024 09 19 18.0 19.50 33865.75000 33865.81250 3.000 15 1 2024 09 19 21.0 22.50 33865.87500 33865.93750 1.000 4 1 2024 09 20 00.0 01.50 33866.00000 33866.06250 0.333 2 1 2024 09 20 03.0 04.50 33866.12500 33866.18750 0.333 2 1 2024 09 20 06.0 07.50 33866.25000 33866.31250 0.667 3 1 2024 09 20 09.0 10.50 33866.37500 33866.43750 1.000 4 1 2024 09 20 12.0 13.50 33866.50000 33866.56250 0.667 3 1 2024 09 20 15.0 16.50 33866.62500 33866.68750 0.667 3 1 2024 09 20 18.0 19.50 33866.75000 33866.81250 1.333 5 1 2024 09 20 21.0 22.50 33866.87500 33866.93750 3.333 18 1 2024 09 21 00.0 01.50 33867.00000 33867.06250 1.333 5 1 2024 09 21 03.0 04.50 33867.12500 33867.18750 2.000 7 1 2024 09 21 06.0 07.50 33867.25000 33867.31250 1.667 6 1 2024 09 21 09.0 10.50 33867.37500 33867.43750 1.333 5 1 2024 09 21 12.0 13.50 33867.50000 33867.56250 1.000 4 1 2024 09 21 15.0 16.50 33867.62500 33867.68750 1.000 4 1 2024 09 21 18.0 19.50 33867.75000 33867.81250 1.667 6 1 2024 09 21 21.0 22.50 33867.87500 33867.93750 1.000 4 1 2024 09 22 00.0 01.50 33868.00000 33868.06250 1.000 4 1 2024 09 22 03.0 04.50 33868.12500 33868.18750 0.333 2 1 2024 09 22 06.0 07.50 33868.25000 33868.31250 0.667 3 1 2024 09 22 09.0 10.50 33868.37500 33868.43750 1.667 6 1 2024 09 22 12.0 13.50 33868.50000 33868.56250 1.667 6 1 2024 09 22 15.0 16.50 33868.62500 33868.68750 2.000 7 1 2024 09 22 18.0 19.50 33868.75000 33868.81250 1.333 5 1 2024 09 22 21.0 22.50 33868.87500 33868.93750 1.000 4 1 2024 09 23 00.0 01.50 33869.00000 33869.06250 1.333 5 1 2024 09 23 03.0 04.50 33869.12500 33869.18750 0.667 3 1 2024 09 23 06.0 07.50 33869.25000 33869.31250 1.667 6 1 2024 09 23 09.0 10.50 33869.37500 33869.43750 3.000 15 1 2024 09 23 12.0 13.50 33869.50000 33869.56250 3.667 22 1 2024 09 23 15.0 16.50 33869.62500 33869.68750 4.333 32 1 2024 09 23 18.0 19.50 33869.75000 33869.81250 1.667 6 1 2024 09 23 21.0 22.50 33869.87500 33869.93750 1.000 4 1 2024 09 24 00.0 01.50 33870.00000 33870.06250 3.333 18 1 2024 09 24 03.0 04.50 33870.12500 33870.18750 2.333 9 1 2024 09 24 06.0 07.50 33870.25000 33870.31250 2.333 9 1 2024 09 24 09.0 10.50 33870.37500 33870.43750 2.000 7 1 2024 09 24 12.0 13.50 33870.50000 33870.56250 2.333 9 1 2024 09 24 15.0 16.50 33870.62500 33870.68750 2.667 12 1 2024 09 24 18.0 19.50 33870.75000 33870.81250 3.000 15 1 2024 09 24 21.0 22.50 33870.87500 33870.93750 4.333 32 1 2024 09 25 00.0 01.50 33871.00000 33871.06250 4.333 32 1 2024 09 25 03.0 04.50 33871.12500 33871.18750 4.667 39 1 2024 09 25 06.0 07.50 33871.25000 33871.31250 4.000 27 1 2024 09 25 09.0 10.50 33871.37500 33871.43750 3.667 22 1 2024 09 25 12.0 13.50 33871.50000 33871.56250 3.667 22 1 2024 09 25 15.0 16.50 33871.62500 33871.68750 4.667 39 1 2024 09 25 18.0 19.50 33871.75000 33871.81250 4.000 27 1 2024 09 25 21.0 22.50 33871.87500 33871.93750 4.000 27 1 2024 09 26 00.0 01.50 33872.00000 33872.06250 4.000 27 1 2024 09 26 03.0 04.50 33872.12500 33872.18750 3.333 18 1 2024 09 26 06.0 07.50 33872.25000 33872.31250 1.667 6 1 2024 09 26 09.0 10.50 33872.37500 33872.43750 1.667 6 1 2024 09 26 12.0 13.50 33872.50000 33872.56250 2.667 12 1 2024 09 26 15.0 16.50 33872.62500 33872.68750 1.667 6 1 2024 09 26 18.0 19.50 33872.75000 33872.81250 1.667 6 1 2024 09 26 21.0 22.50 33872.87500 33872.93750 0.667 3 1 2024 09 27 00.0 01.50 33873.00000 33873.06250 1.333 5 1 2024 09 27 03.0 04.50 33873.12500 33873.18750 2.333 9 1 2024 09 27 06.0 07.50 33873.25000 33873.31250 2.000 7 1 2024 09 27 09.0 10.50 33873.37500 33873.43750 1.333 5 1 2024 09 27 12.0 13.50 33873.50000 33873.56250 2.333 9 1 2024 09 27 15.0 16.50 33873.62500 33873.68750 0.667 3 1 2024 09 27 18.0 19.50 33873.75000 33873.81250 0.333 2 1 2024 09 27 21.0 22.50 33873.87500 33873.93750 0.333 2 1 2024 09 28 00.0 01.50 33874.00000 33874.06250 0.000 0 1 2024 09 28 03.0 04.50 33874.12500 33874.18750 0.000 0 1 2024 09 28 06.0 07.50 33874.25000 33874.31250 1.333 5 1 2024 09 28 09.0 10.50 33874.37500 33874.43750 1.667 6 1 2024 09 28 12.0 13.50 33874.50000 33874.56250 2.000 7 1 2024 09 28 15.0 16.50 33874.62500 33874.68750 3.000 15 1 2024 09 28 18.0 19.50 33874.75000 33874.81250 1.667 6 1 2024 09 28 21.0 22.50 33874.87500 33874.93750 2.000 7 1 2024 09 29 00.0 01.50 33875.00000 33875.06250 2.667 12 1 2024 09 29 03.0 04.50 33875.12500 33875.18750 2.000 7 1 2024 09 29 06.0 07.50 33875.25000 33875.31250 3.333 18 1 2024 09 29 09.0 10.50 33875.37500 33875.43750 3.333 18 1 2024 09 29 12.0 13.50 33875.50000 33875.56250 3.667 22 1 2024 09 29 15.0 16.50 33875.62500 33875.68750 2.333 9 1 2024 09 29 18.0 19.50 33875.75000 33875.81250 2.667 12 1 2024 09 29 21.0 22.50 33875.87500 33875.93750 3.000 15 1 2024 09 30 00.0 01.50 33876.00000 33876.06250 4.000 27 1 2024 09 30 03.0 04.50 33876.12500 33876.18750 2.333 9 1 2024 09 30 06.0 07.50 33876.25000 33876.31250 1.333 5 1 2024 09 30 09.0 10.50 33876.37500 33876.43750 0.667 3 1 2024 09 30 12.0 13.50 33876.50000 33876.56250 1.333 5 1 2024 09 30 15.0 16.50 33876.62500 33876.68750 1.667 6 1 2024 09 30 18.0 19.50 33876.75000 33876.81250 2.333 9 1 2024 09 30 21.0 22.50 33876.87500 33876.93750 2.333 9 1 2024 10 01 00.0 01.50 33877.00000 33877.06250 1.667 6 0 2024 10 01 03.0 04.50 33877.12500 33877.18750 2.333 9 0 2024 10 01 06.0 07.50 33877.25000 33877.31250 1.333 5 0 2024 10 01 09.0 10.50 33877.37500 33877.43750 0.667 3 0 2024 10 01 12.0 13.50 33877.50000 33877.56250 1.000 4 0 2024 10 01 15.0 16.50 33877.62500 33877.68750 1.667 6 0 2024 10 01 18.0 19.50 33877.75000 33877.81250 1.333 5 0 2024 10 01 21.0 22.50 33877.87500 33877.93750 1.000 4 0 2024 10 02 00.0 01.50 33878.00000 33878.06250 2.333 9 0 2024 10 02 03.0 04.50 33878.12500 33878.18750 1.667 6 0 2024 10 02 06.0 07.50 33878.25000 33878.31250 1.667 6 0 2024 10 02 09.0 10.50 33878.37500 33878.43750 1.667 6 0 2024 10 02 12.0 13.50 33878.50000 33878.56250 1.667 6 0 2024 10 02 15.0 16.50 33878.62500 33878.68750 0.667 3 0 2024 10 02 18.0 19.50 33878.75000 33878.81250 1.333 5 0 2024 10 02 21.0 22.50 33878.87500 33878.93750 1.000 4 0 2024 10 03 00.0 01.50 33879.00000 33879.06250 1.000 4 0 2024 10 03 03.0 04.50 33879.12500 33879.18750 1.333 5 0 2024 10 03 06.0 07.50 33879.25000 33879.31250 1.667 6 0 2024 10 03 09.0 10.50 33879.37500 33879.43750 1.667 6 0 2024 10 03 12.0 13.50 33879.50000 33879.56250 3.000 15 0 2024 10 03 15.0 16.50 33879.62500 33879.68750 1.000 4 0 2024 10 03 18.0 19.50 33879.75000 33879.81250 2.000 7 0 2024 10 03 21.0 22.50 33879.87500 33879.93750 2.333 9 0 2024 10 04 00.0 01.50 33880.00000 33880.06250 2.333 9 0 2024 10 04 03.0 04.50 33880.12500 33880.18750 1.667 6 0 2024 10 04 06.0 07.50 33880.25000 33880.31250 1.667 6 0 2024 10 04 09.0 10.50 33880.37500 33880.43750 1.333 5 0 2024 10 04 12.0 13.50 33880.50000 33880.56250 1.667 6 0 2024 10 04 15.0 16.50 33880.62500 33880.68750 2.000 7 0 2024 10 04 18.0 19.50 33880.75000 33880.81250 2.333 9 0 2024 10 04 21.0 22.50 33880.87500 33880.93750 3.333 18 0 2024 10 05 00.0 01.50 33881.00000 33881.06250 2.667 12 0 2024 10 05 03.0 04.50 33881.12500 33881.18750 0.667 3 0 2024 10 05 06.0 07.50 33881.25000 33881.31250 1.667 6 0 2024 10 05 09.0 10.50 33881.37500 33881.43750 1.000 4 0 2024 10 05 12.0 13.50 33881.50000 33881.56250 1.667 6 0 2024 10 05 15.0 16.50 33881.62500 33881.68750 1.000 4 0 2024 10 05 18.0 19.50 33881.75000 33881.81250 1.667 6 0 2024 10 05 21.0 22.50 33881.87500 33881.93750 1.333 5 0 2024 10 06 00.0 01.50 33882.00000 33882.06250 1.333 5 0 2024 10 06 03.0 04.50 33882.12500 33882.18750 0.000 0 0 2024 10 06 06.0 07.50 33882.25000 33882.31250 2.333 9 0 2024 10 06 09.0 10.50 33882.37500 33882.43750 1.333 5 0 2024 10 06 12.0 13.50 33882.50000 33882.56250 3.000 15 0 2024 10 06 15.0 16.50 33882.62500 33882.68750 3.333 18 0 2024 10 06 18.0 19.50 33882.75000 33882.81250 3.333 18 0 2024 10 06 21.0 22.50 33882.87500 33882.93750 4.667 39 0 2024 10 07 00.0 01.50 33883.00000 33883.06250 5.667 67 0 2024 10 07 03.0 04.50 33883.12500 33883.18750 4.667 39 0 2024 10 07 06.0 07.50 33883.25000 33883.31250 3.333 18 0 2024 10 07 09.0 10.50 33883.37500 33883.43750 5.000 48 0 2024 10 07 12.0 13.50 33883.50000 33883.56250 5.667 67 0 2024 10 07 15.0 16.50 33883.62500 33883.68750 4.667 39 0 2024 10 07 18.0 19.50 33883.75000 33883.81250 6.333 94 0 2024 10 07 21.0 22.50 33883.87500 33883.93750 5.333 56 0 2024 10 08 00.0 01.50 33884.00000 33884.06250 6.667 111 0 2024 10 08 03.0 04.50 33884.12500 33884.18750 7.000 132 0 2024 10 08 06.0 07.50 33884.25000 33884.31250 6.000 80 0 2024 10 08 09.0 10.50 33884.37500 33884.43750 4.333 32 0 2024 10 08 12.0 13.50 33884.50000 33884.56250 3.333 18 0 2024 10 08 15.0 16.50 33884.62500 33884.68750 3.667 22 0 2024 10 08 18.0 19.50 33884.75000 33884.81250 3.667 22 0 2024 10 08 21.0 22.50 33884.87500 33884.93750 4.333 32 0 2024 10 09 00.0 01.50 33885.00000 33885.06250 4.000 27 0 2024 10 09 03.0 04.50 33885.12500 33885.18750 4.333 32 0 2024 10 09 06.0 07.50 33885.25000 33885.31250 4.000 27 0 2024 10 09 09.0 10.50 33885.37500 33885.43750 3.000 15 0 2024 10 09 12.0 13.50 33885.50000 33885.56250 3.333 18 0 2024 10 09 15.0 16.50 33885.62500 33885.68750 2.333 9 0 2024 10 09 18.0 19.50 33885.75000 33885.81250 1.667 6 0 2024 10 09 21.0 22.50 33885.87500 33885.93750 2.333 9 0 2024 10 10 00.0 01.50 33886.00000 33886.06250 1.667 6 0 2024 10 10 03.0 04.50 33886.12500 33886.18750 2.667 12 0 2024 10 10 06.0 07.50 33886.25000 33886.31250 1.333 5 0 2024 10 10 09.0 10.50 33886.37500 33886.43750 2.333 9 0 2024 10 10 12.0 13.50 33886.50000 33886.56250 4.000 27 0 2024 10 10 15.0 16.50 33886.62500 33886.68750 7.667 179 0 2024 10 10 18.0 19.50 33886.75000 33886.81250 8.333 236 0 2024 10 10 21.0 22.50 33886.87500 33886.93750 8.667 300 0 2024 10 11 00.0 01.50 33887.00000 33887.06250 8.333 236 0 2024 10 11 03.0 04.50 33887.12500 33887.18750 7.667 179 0 2024 10 11 06.0 07.50 33887.25000 33887.31250 7.667 179 0 2024 10 11 09.0 10.50 33887.37500 33887.43750 7.667 179 0 2024 10 11 12.0 13.50 33887.50000 33887.56250 6.667 111 0 2024 10 11 15.0 16.50 33887.62500 33887.68750 4.000 27 0 2024 10 11 18.0 19.50 33887.75000 33887.81250 3.333 18 0 2024 10 11 21.0 22.50 33887.87500 33887.93750 3.667 22 0 2024 10 12 00.0 01.50 33888.00000 33888.06250 3.333 18 0 2024 10 12 03.0 04.50 33888.12500 33888.18750 1.667 6 0 2024 10 12 06.0 07.50 33888.25000 33888.31250 2.333 9 0 2024 10 12 09.0 10.50 33888.37500 33888.43750 1.667 6 0 2024 10 12 12.0 13.50 33888.50000 33888.56250 -1.000 -1 0 2024 10 12 15.0 16.50 33888.62500 33888.68750 -1.000 -1 0 2024 10 12 18.0 19.50 33888.75000 33888.81250 -1.000 -1 0 2024 10 12 21.0 22.50 33888.87500 33888.93750 -1.000 -1 0