# 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 2002 3 5 30 4 6 9 16 29 24K 22 11 10* 12* 19* 13* Feb 2002 14 15 23 3 16 24 27 4 19K 25 28 6 5 2* 7* Mar 2002 17 28 14 16 27 8 29K 9 15 13 24 5 31 30 19* Apr 2002 8 9 26 5 25 6 4 21 10 15 20 18 17 19 23 May 2002 24 5 31 1 25 4 3 17 2 30 23 11 14 27 10* Jun 2002 28 27 14 1 15 6 17 7 24 29 2* 10* 4* 8* 30* Jul 2002 14 3 15 2 4K 18 13 11 30K 24A 6 17 21 12* 27* Aug 2002 6 24 7 5 25 8K 23A 28A 22A 31A 2 21 19 20 1 Sep 2002 23 25 24 29 20 28 26 16K 27K 15 7 4 8 30 11 Oct 2002 13 12 11 21A 22A 20A 23A 17A 19A 18A 24 4 1 7 2 Nov 2002 8 9K 16A 1A 17A 14A 18A 15A 11A 26A 21 3 2 22 5 Dec 2002 18 17 11 12 13 10 16 9K 31A 15A 27 19 23 20 24