# 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 1966   16  13  12   1  31     6  17  11  30  14    22  21  20* 23* 24*
 Feb 1966   28  14  26   9   1     2  18  27  21   7    23  24*  5* 20* 19*
 Mar 1966    2   7   1  24  31     8  18   6   5   9K   23  14  28  19  26 
 Apr 1966   27  19  11  25  26    16  18  12  17  28     1* 13* 22*  2* 30*
 May 1966   15  23  24  14  10    19  29   7  21  22    26  31   4*  2* 11*
 Jun 1966   10  22  18   9  27    11  17   8   6  14    25* 24* 23*  1*  2*
 Jul 1966   13  25   7  14  18     2   3   6  19  31     9  10   8  12* 21*
 Aug 1966    2  17  16  28  22    15   7  21   8  27    30  31  23  19  24*
 Sep 1966   18  13  12  22K 11A   17A 21A 14A 16A 24A    4   3   8   6  26 
 Oct 1966   11  21  22   2  23    10  29  20   3  19     5  31  16   4   6 
 Nov 1966   14  23   9  22  25    15  16   7K 24K 27     1  30  28*  3* 29*
 Dec 1966   12  11   9  31   3     7  19   8  10  18    14  27  26  13   5