# 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 1950    8  31  17  29   3    23  18K 12   5   2A   24  25  20  14  21*
 Feb 1950   26  17  10  13  18    16  27  11  19  14    21  20  23  24  22 
 Mar 1950   11  10  13  18  12     8   4  23   5  17    19  27  21  22  24 
 Apr 1950   21  26  27K 14  22K   11A  8A 25A  9A 10A    5   1   2  30  24 
 May 1950    9  18   8  19K 12    17  31K  1  21A 20A   28   3  27  23  15 
 Jun 1950   13  15  19  28  20     7  27  14  16K  4A   24  30   6  29   9 
 Jul 1950   23  19  26  18   2     8  20  17A 27A 10A   12  25  24  11   4 
 Aug 1950   26  17  25  24  16    27   5  22  23A 31A   19  20   8  10   9 
 Sep 1950   29  15  14  22   1     2  28A 21A 12A 27A    5   3   6   4   8 
 Oct 1950   27  21  19  10  11    25K 20  26  24A 22A   28   2  29   1  31 
 Nov 1950    7  20  15   6  21K   19K  9  16   8A 23A   26   1  25  27   4 
 Dec 1950   11  31   4   1K 21K   17A 29A 30A  3A  5A   24  13  23  14  25