# 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 1992 24 23 25 19 9A 18A 26A 21A 7A 22A 13 11 16 12 30 Feb 1992 16 15 5A 11A 6A 28A 14A 13A 12A 19A 3 9 20 21 27 Mar 1992 19 14 20 13K 6A 15A 28A 7A 3A 27A 23 9 17 24 21 Apr 1992 11 12 17 16 10 27 9 14 2K 13 3 6 8 7* 20* May 1992 17 16 14 15 6 5 26A 31A 21A 20A 10 11 22 9 8 Jun 1992 4 16 6 2 17 3K 5 14 20A 1A 8 29 12 30 11 Jul 1992 11 7 26 19 9 29 4 18 8 6 22 13 1* 28* 23* Aug 1992 3 17 31 2 25 28 30K 18 12 10A 23 22 5 20 7 Sep 1992 1 27 24 13 12 21A 14A 26A 20A 23A 17 10 9 29 3 Oct 1992 24 23 5 3 21 25A 4A 8A 7A 22A 12 15 27 1 29 Nov 1992 20 29 27 28 18A 19A 21A 17A 26A 16A 9 23 4 2 15* Dec 1992 26 25 6K 16K 5A 22A 12A 27A 23A 13A 29 28 8 17 9*