# 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 1968    9  25  10   8   4A    7A 31A  3A 21A 22A    2   1  29*  6* 20*
 Feb 1968    6  25  26   7K 14    23  24A  5A 27A  1A   11  10  20  28  15 
 Mar 1968    9   8   7  13  22     6A 21A 12A 11A 23A   15  16  30  14  24 
 Apr 1968   20  19   9   8  21    10  25K 30A 24A 18A    6   1   5  26  14 
 May 1968    6   5  26  27   4    25  28K  8A 29A 15A    7  12  21   9  20*
 Jun 1968   24  21  25   6   5    28K 23  20A 15A  9A   11  13  10  12  14 
 Jul 1968   24   9  29  20  31    17   8  12A 15   6    10  14  13  22*  3*
 Aug 1968   29  30   1  28   2    26  21  25K 22  27    16  17  14  15  24*
 Sep 1968   25  27  18  24  26    11  17  10  30A 20A    8  13  15  14  23 
 Oct 1968   22  21  11  23   5     4  15  16  26  28K   31  12   2  29  13 
 Nov 1968   30  15  12  14  29    24  22  13  19  23K    1   2   3   4   9 
 Dec 1968   14  26  20  17   7    28   9  13   2  15     5   4  25   3* 23*