# 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 1977   10  26  27   2K 21    23   9  17   8  13A   30  14* 31*  1* 29*
 Feb 1977   27   4  20  16K 19    21A  1A 26A 22A 12A    9   2   7*  8* 18*
 Mar 1977    4   5  31   3   2    15   7  19  30  16     9  12  11* 10* 26*
 Apr 1977   27  26   1  28   2    23  13  22  30A 18A   19   7   6   8  20 
 May 1977   29  26   8  27  21    19  30  25   7  13K    2  11  16  17* 12*
 Jun 1977   15  11  12  25   6     4   8   9  26   3     2* 28* 20* 23* 18*
 Jul 1977   26  27  28  12  25     5  23  24A 18A 31A   29  20  16   6  19 
 Aug 1977   31   2  21  30  22    29   1  23   3A 28A    5  17  11  25  19 
 Sep 1977    5   6  29   1  30     2   7K 12K  4K 18K   22  21  20  19  13 
 Oct 1977    9   7   1  25  10     2  21  31  26K 24    27  28  12  19  22 
 Nov 1977   24  23   9   8  22     3  20   1  21K 28    14  15  13  26* 12*
 Dec 1977    8  18  19   7  20     9  23  10  15   6     2  11  12   5* 13*