# 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 1953   16  15  17  10   4    12  23A 22A  7A 11A    5  26  27  28  19 
 Feb 1953    7  13   6   5   1     8  12  18  20K  3    24  26  25  23  22 
 Mar 1953   18  13K 12  17  11A   31A  6A  5A  4A 20A    2  24  25   9  23 
 Apr 1953    7  14   5  28A  6A    9A  8A 24A 29A 27A   16  20   4  21  23 
 May 1953   13  14   3   2  12    30   1  25  29   4    16  15   6   8  19 
 Jun 1953   26  23  27  16  19    28   1   9   8  25     2  29  30   3   4 
 Jul 1953   16  17  18  11K 21    19  22K 10K 20A 25A   27  23  29   2   1 
 Aug 1953   20  21  22  19  17    18   5   6   8   3A   24  30  27  12  23 
 Sep 1953   14  29   9A 30A 28A   10A 26A 13A  8A 12A   19   4  23   3  20 
 Oct 1953   14   5  12  13   6     4  26   2   3A 30A   19  18  16  15  20 
 Nov 1953   10  28  30   2   9     8   4   1  11   7    13  15  19  14  16 
 Dec 1953    1   2  31  30  23    21  10  26   3  16    11  12  13* 22*  4*