Kp index breakdown Apr 26-Apr 28 2018 Apr 26 Apr 27 Apr 28 00-03UT 2 3 2 03-06UT 1 4 1 06-09UT 1 2 1 09-12UT 1 3 1 12-15UT 2 3 1 15-18UT 2 3 1 18-21UT 3 2 2 21-00UT 3 3 2