# DOI: https://doi.org/10.5880/Kp.0001
# LICENCE: CC BY 4.0, please cite:
# 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
# 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
# The Kp index was introduced by Bartels (1949) and is produced by Geomagnetic
# Observatory Niemegk, GFZ German Research Centre for Geosciences.
                          Quietest Days                 Most Disturbed Days
  Month
            Q1  Q2  Q3  Q4  Q5    Q6  Q7  Q8  Q9  Q10   D1  D2  D3  D4  D5

 Jan 2010   17   7   9   2   8    27   6  16  19   1    20* 13* 11* 21* 30*
 Feb 2010   20  21  27   5  28     9  26  10  23   7    15*  2*  3* 16*  1*
 Mar 2010   22  23  21   9   8    13  15   5  19  16    11* 12* 10*  3* 17*
 Apr 2010   26  10  18  25  30    16  28  13  17  20     5   6  12*  7   2*
 May 2010   23  24  27   9  13    15   1  14  22  16     2  29   3  30  31*
 Jun 2010   12  20   8  19   9    23  14  11  22   7    16* 30*  4* 26* 27*

 Jul 2010   10  17  18   7  13     6  19   8   5  16    27* 28*  1* 14* 15*
 Aug 2010   30  22  21  29  14    20  31  13  19   7     4   3  24  25* 27*
 Sep 2010   11  12  30   4  22    10   3  13  19  20    24* 28*  8*  7* 14*
 Oct 2010    2  14   1   3   4    30  21   7  28  10    23  11  24* 17* 12*
 Nov 2010    6  26  19   2   7     5  20   9  30   1    11* 12* 23* 28* 15*
 Dec 2010   10  22  11   3  23     9   4   5  21   1    14* 20* 28* 15* 13*

 Jan 2011   30  23   5  27  21    22  26   1   2  29     7* 14* 13* 19*  8*
 Feb 2011    3   9  27  13  28    24  23  25  17  22     4  18   5*  6* 14*
 Mar 2011   15  26  16  27  18    28  31  14  29  25    11   1  10*  2*  3*
 Apr 2011   27  26  10  28  16    17  23  21  15  14    30   6  12   2  20*
 May 2011   20   8  12  25   9    13   6  19  14  23    28  29   2   1* 31*
 Jun 2011   29   3  28  19  27    18  30  16   6  25     5  23* 22* 24*  8*

 Jul 2011   27  28  16  24  17    29  15   2  26  18    20* 30* 19*  1* 11*
 Aug 2011   31  18  19   3  21     2  30  13  12  11     6   5  15* 14* 23*
 Sep 2011   23  19   1  16   8     2  24  22  14  25    10  27  26  17  12 
 Oct 2011   28  29  22  14  23    10  13  26  11  18    25   1* 24   5*  2*
 Nov 2011   19  14   9  20  13    18  10   5   3  16     1* 29* 30*  2* 24*
 Dec 2011   27  16  26  17   6    15   7  23  24  18     3* 29* 10* 11* 30*

 Jan 2012   14  19   4  31  18    20   8   1   2  15    22  24* 25* 23* 16*
 Feb 2012   17  23  12   2  16    11  10  18K 24K  9    15  19  20  27*  7*
 Mar 2012   26  29  25  31  20    30  21  23K  3A 22A    9   7  15  12  16 
 Apr 2012   30   6   9   8  16    29  15  11   3  19K   24  25  23  13   5*
 May 2012   27   7   5   1  26    17   4  14   2   6     9  22* 23* 13* 11*
 Jun 2012   19  15  21  14  20    24  23  22  13  29    17   3  30   5* 16 

 Jul 2012   13  26  27  18  31    19  29  25K 22   7A   15   9  16   2  17*
 Aug 2012   31  10  30  28  29    11   5   1   9  15     2* 19* 16* 20* 26*
 Sep 2012   23  28  11  25  24    29  10   9  22  17     3   5   2*  4* 19*
 Oct 2012   20   4  29  30  22    21  28  25  19  27    13   9   8   1  14 
 Nov 2012    9  30  28   4  11    22   3  29  10   8    14   1  13* 20* 24*
 Dec 2012    6   8  22   7  27    31  12  23  28   5    17* 15* 20*  2* 18*

 Jan 2013    1  22   5  30  10    31   3  23  24   4    26  17* 13* 18* 20*
 Feb 2013    6   5  24  25   9    27  15   3  18K 10    14* 13* 22*  2* 17*
 Mar 2013    8   7  26  25  13    10   6   5  31   4    17   1  29  27  30*
 Apr 2013   19   8  18  17  21     3   5   9  20   2    24  26* 14* 25* 23*
 May 2013   29  30  11  12   9    10  13   4  21   3     1  25  24  18* 26*
 Jun 2013   16  26  17  13  14    18  12  15  19   5     1  29   7   6  28 

 Jul 2013    2   3  17   8  21     4  24  31  23  16     6  14  10  15  11 
 Aug 2013   29   2   7   8  20    11   3  19   1  26    16  21* 23* 27*  5*
 Sep 2013   28  26  27  15  29     7  30   9   5  16    19* 24*  1* 13*  2*
 Oct 2013    5  28   4  19  21    20  26  24  25  13     2   9  14* 15* 30*
 Nov 2013   25  24  21  27  28    26  12  18  14  22    11   9  10* 16*  7*
 Dec 2013    2  12  22  26  27    23  30  28  24  11     8  14*  1*  3* 25*

 Jan 2014   19  31  18  20  16    17   5   6  27  15     2*  1* 14* 22*  3*
 Feb 2014   13  26  14  25   2     4   5   1  17  24    19  20   8  16* 23*
 Mar 2014   16   9  17   7   8    11  24  10  15  19    13* 26* 21* 25* 29*
 Apr 2014   10   6  27   2  22    16   9   8  29K 15    20  12  21* 30* 13*
 May 2014   21   6  31  17  26     2  13   7  25  27     8  23*  4* 11* 30*
 Jun 2014    1  12  27  15  22     2  26  23K 13  16     8  18*  7* 19* 20*

 Jul 2014   19  18  20   1  29     6   5  17  30  16    28* 14* 10*  9* 15*
 Aug 2014   16  25  24   9  26    22  15  14  23  18    28* 27* 29* 31* 19*
 Sep 2014   14  15   8  17  20    21K  4  18K  7A 10K   12  19  24  26* 27*
 Oct 2014   12   3  30   4   5     7K 31   6K 13K 16K   20  14* 21* 18* 22*
 Nov 2014   29  26  13  28   3    25  24   1A 27A  6A   10   4  16  15*  5*
 Dec 2014   11  18  17  16  27K    3A 20A 19A 31A 10A    7  29  12* 26* 22*

 Jan 2015   20  18  19  25  15K   24   1  14  17K  9     7   4*  5* 26*  8*
 Feb 2015   13  27  14  26  12    20  16   6  11K 15K    2  24  17   1  18*
 Mar 2015   10  30   5  14   9K   15  13K 27A 26A 12A   17  18   2  19   1 
 Apr 2015   25  26  12   8  29    24  30   7  27  28    16  10  15  17  21 
 May 2015   25  21  22  23  24    30  31  16  17  27    13   6  12* 18* 11*
 Jun 2015   20   5   2   4   3    19   6  29  30  12    23  22   8  25  14*

 Jul 2015   19   2   3  18  20     8  17   9  29   7    13  11   5  23   4*
 Aug 2015   14  30  31   5  21     4   3  24K 11A 25A   27  28  15  16  23 
 Sep 2015   30  27  28  26   1    29  25K 24A  2A  3A   11   9  20   7   8 
 Oct 2015   26  28  27  19  29    22  23  31  16K 25     7   8   9  13  12 
 Nov 2015   24  25  23  22  26    21  12  20   2  28    10   7   3   4   9 
 Dec 2015   30   3   4  28  18    29  16K 13A 17K 25A   20  31  21  10   6 

 Jan 2016   25  30  29  16  17    26  27  15  18K  4    21   1  20   6*  7*
 Feb 2016   22  28  27  21  29    10   4  25  20   2    16  17  18   8* 19*
 Mar 2016   26  13   5   4  25K   22  24  31K  9   3     6  15   7  17  16 
 Apr 2016   19   9  29   1  20    28  21  25  18  11K   13  14  12* 17*  2*
 May 2016   25  26  12  23   4    24  11  20  13   5     8   9   2  21*  1*
 Jun 2016    3   2  21   4  20     9  29  19   1   8     5   6  14  24* 15*

 Jul 2016    5  18  27  31  26     6  17  30K  4  21     7   8* 20* 12* 25*
 Aug 2016   28   1  15  14  22    19  20  13  27  16K    3  24* 30* 23*  5*
 Sep 2016   16  11  23  17  10    22   9  13  24  12     3  28  29   2  27 
 Oct 2016   21  11  20   9  22    12K  6   7  19   8A   25  26  13  29  27 
 Nov 2016   19   5   8  20  30    17  18   7  16   6    25  13  24  12*  3*
 Dec 2016    4  16   3  15  30     1   2  14  13   5     9  22  26   8  21 

 Jan 2017   16  24  17  14  13    23  12  15  25K  2    31  27   7   5*  8*
 Feb 2017   14  26  15  12   8    11  21  13  25K  9     1   2  17*  3* 24*
 Mar 2017   20  19  18  13  17    25  26  14  16  24    27   1   2  28  31 
 Apr 2017   16  17   3  13  10    30  28  12K 29  18K   22  23  20   4* 24*
 May 2017   26  25   3  24  13    31   6   2   5K  1    28  20  19* 15* 27*
 Jun 2017    4  20  10   8  30    15  21  28   9   2    16  17* 11* 18* 25*

 Jul 2017    5  14   8  31  15    30  19  13  29  12    16  17   9   2* 22*
 Aug 2017   28  15  26   9   2    30   8  25  14  10    31  19  17  23  20 
 Sep 2017   26   9  25  23  22    21  10K 24   3A 19A    8  28  27  15   7 
 Oct 2017   30   9  29  31  10     8   7  27  23  18    13  14  11  12  15 
 Nov 2017    6   5  26   1   4    29  19  27  17  12     8   7  21  10  16*
 Dec 2017    3  22  21  10  15    16  30  31   2   9     5  17  18*  6* 12*

 Jan 2018   18  17   7  11   6     3  29   4  12  28    14* 22*  1* 25*  9*
 Feb 2018   11  13  14   8   7    21   2   3  12   4    27* 19* 23* 18* 15*
 Mar 2018   28  12  13   8  29     2   7   6  21   5    18  16* 25* 15* 23*
 Apr 2018   19  16  17  29  28     6   3  26   7   1    20  10* 11* 21*  9*
 May 2018    1  21  19  20  26     3  25  15  24  16     6   5   7* 11*  9*
 Jun 2018   16  10  21  15  11    29  22  30   9  12     1  26  23*  2* 25*

 Jul 2018    1   9   2  18  15    23  27  26  19   3    24*  5* 21* 11* 25*
 Aug 2018    6  14  10  13  23    30   9   5   8  31    26  27  20* 15* 17*
 Sep 2018   20   3  19   1   8     6   2   7  30  16    11  22  10  13* 14*
 Oct 2018   18  20  29  19  23    28  17  24  27   4     7   8*  9* 10* 13*
 Nov 2018   17  15  16  26  22    23  30  18  28  25     5   4* 10*  8*  9*
 Dec 2018   15  23  14  16  13    26  22  24  25  12    28   2*  8* 20*  7*

 Jan 2019    2  28   3  30  12    13  29  10  21  20    24*  5* 23* 31* 25*
 Feb 2019   25  24  23  26  19    20  22  16  15  17    28   2*  1* 13* 21*
 Mar 2019   22  23  21  18  11    24  30  13  10   5     1  17*  2* 16* 28*
 Apr 2019   18  22  21  17  20    26  14  19  30  28    10*  5*  8*  3*  4*
 May 2019    8  19   5  21  25    31  22  12  18  17    14  11  29*  1*  2*
 Jun 2019   11   6  10  17  23     1  29  19  18  12     8  13*  4* 20* 14*

 Jul 2019   26  20  25   6  19    18   3   5  24   7     9* 10* 30*  1*  8*
 Aug 2019    3  19   2  29  15     4  25  14  23  21    31   5  27*  6* 30*
 Sep 2019   20  23  19  26  22    25  11  10  12  14     1  28   2  27   9*
 Oct 2019   13  23  22   3  19    15   8   6  20  17    25  26  24* 27* 10*
 Nov 2019   18   2   3  20  13    15  19   8  10  14    22* 24* 21* 23* 11*
 Dec 2019    3  29  28  30   5     2   7  17  16  24    18* 19* 11* 20* 15*