# 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.
  International           Quietest Days                 Most Disturbed Days
  Month
            Q1  Q2  Q3  Q4  Q5    Q6  Q7  Q8  Q9  Q10   D1  D2  D3  D4  D5

 Jan 1987    5   4   6  30  14     7  15K 11  10  13    20*  1* 16* 28* 23*
 Feb 1987    3   2   5   4  14    19  13  26  15  11A   20  21* 12* 22*  8*
 Mar 1987   20   2  31  30  24    29  23   3  25K 13A   27   5   7  21* 22*
 Apr 1987    3  28  23  18  21    30  16  25  26   2     4*  7*  5* 13*  8*
 May 1987   18  19  12  21  17     8  20  15  16   9    25  24  29  27* 31*
 Jun 1987   30  23   8   9  22    10  28  15   3  29     6  19* 12* 26*  7*
 Jul 1987    1  26   2   7   6    13  27  14  23   5    29  28  15  16  25*
 Aug 1987   10   7   2  21  18    22A  4A 11A  6A  9A   26  25  31  13  27 
 Sep 1987   19   3   5   4  18A    6A  9A  8A 21A  7A   25  30  11   1  10 
 Oct 1987    9   6  18  22   5    19  10A 20A 12A  7A   28  27   3  14  11 
 Nov 1987   17  29  30   8  18     7K 21  22A  1A 16A   23   3  13  24   2 
 Dec 1987    8  27  30  28  13    14   2  31  26   7    16  10  22   5* 17*