# 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 2014 19 31 18 20 16 17 5 6 27 15 2* 1* 14* 22* 3* Feb 2014 13 26 14 25 2 4 5 1 17 24 19 20 8 16* 23* Mar 2014 16 9 17 7 8 11 24 10 15 19 13* 26* 21* 25* 29* Apr 2014 10 6 27 2 22 16 9 8 29K 15 20 12 21* 30* 13* May 2014 21 6 31 17 26 2 13 7 25 27 8 23* 4* 11* 30* Jun 2014 1 12 27 15 22 2 26 23K 13 16 8 18* 7* 19* 20* Jul 2014 19 18 20 1 29 6 5 17 30 16 28* 14* 10* 9* 15* Aug 2014 16 25 24 9 26 22 15 14 23 18 28* 27* 29* 31* 19* Sep 2014 14 15 8 17 20 21K 4 18K 7A 10K 12 19 24 26* 27* Oct 2014 12 3 30 4 5 7K 31 6K 13K 16K 20 14* 21* 18* 22* Nov 2014 29 26 13 28 3 25 24 1A 27A 6A 10 4 16 15* 5* Dec 2014 11 18 17 16 27K 3A 20A 19A 31A 10A 7 29 12* 26* 22*