# 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 2016 25 30 29 16 17 26 27 15 18K 4 21 1 20 6* 7* Feb 2016 22 28 27 21 29 10 4 25 20 2 16 17 18 8* 19* Mar 2016 26 13 5 4 25K 22 24 31K 9 3 6 15 7 17 16 Apr 2016 19 9 29 1 20 28 21 25 18 11K 13 14 12* 17* 2* May 2016 25 26 12 23 4 24 11 20 13 5 8 9 2 21* 1* Jun 2016 3 2 21 4 20 9 29 19 1 8 5 6 14 24* 15* Jul 2016 5 18 27 31 26 6 17 30K 4 21 7 8* 20* 12* 25* Aug 2016 28 1 15 14 22 19 20 13 27 16K 3 24* 30* 23* 5* Sep 2016 16 11 23 17 10 22 9 13 24 12 3 28 29 2 27 Oct 2016 21 11 20 9 22 12K 6 7 19 8A 25 26 13 29 27 Nov 2016 19 5 8 20 30 17 18 7 16 6 25 13 24 12* 3* Dec 2016 4 16 3 15 30 1 2 14 13 5 9 22 26 8 21