# 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 1995 28 26 15 27 24 14 1 19 25 12 30 17 3 18 29 Feb 1995 25 22 24 10 9 23 21 5 20 17 13 28 12 14 11 Mar 1995 21 22 7 8 19 18 20 6K 24 25 12 13 1 26 11 Apr 1995 3 21 4 15 16 30 14 17K 6K 19 7 8 27 9 10 May 1995 1 21 15 10 27 14 22 11 28 29A 3 2 5 16 30 Jun 1995 13 12 8 24 9 17 11 15 14 27 19 30 1 3 20 Jul 1995 10 11 6 5 12 7 21 8 13 2 16 24 17 1* 18* Aug 1995 31 21 6 1 30 28 4 20 2 5 14 8 9 25* 10* Sep 1995 29 18 22 1 2 19 3 26 30 25 8 27 5 11 6 Oct 1995 28 29 1 26 25 15 27 14 16A 17A 4 20 8 7 18 Nov 1995 24 25 21 9 15 26 14 16K 13 23 1 6 27 2 5* Dec 1995 8 13 30 18 29 7 11 28 20 6 24 22 16 1* 4*