# 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 2020 20 19 14 24 13 27 2 17 1 12 30* 9* 5* 29* 6* Feb 2020 13 25 14 27 16 26 3 24 10 5 6* 7* 21* 18* 19* Mar 2020 14 11 25 5 10 7 24 6 15 2 31* 23* 30* 19* 21* Apr 2020 19 30 29 6 23 17 7 18 16 5 20* 8* 21* 3* 14* May 2020 14 9 17 20 28 15 29 16 8 7 30* 22* 5* 6* 25* Jun 2020 29 22 14 6 25 12 13 3 28 15 7* 2* 10* 27* 26* Jul 2020 8 12 11 10 23 26 22 9 20 27 25* 24* 14* 5* 4* Aug 2020 9 10 15 11 24 20 17 1 25 16 31 3* 29* 2* 28* Sep 2020 9 10 21 11 19 16 17 8 3 7 28 26 24 27 1* Oct 2020 14 9 10 15 8 18 13 11 12 16 24* 26* 25* 23* 29* Nov 2020 9 10 16 4 2 17 19 3 18 13 22 21* 28* 1* 23* Dec 2020 4 17 18 7 1 16 15 3 31 2 22* 21* 23* 24* 30*