18 02 2012 15-minute Estimated Geomagnetic Activity Index UT:min Kp 00:00 0.67 00:15 0.67 00:30 0.67 00:45 0.67 01:00 0.67 01:15 0.67 01:30 0.67 01:45 0.67 02:00 0.67 02:15 0.67 02:30 0.67 02:45 0.67 03:00 0.67 03:15 0.33 03:30 0.67 03:45 0.67 04:00 0.67 04:15 0.33 04:30 0.67 04:45 0.33 05:00 0.33 05:15 0.67 05:30 0.67 05:45 0.67 06:00 0.67 06:15 0.67 06:30 0.67 06:45 0.67 07:00 0.67 07:15 0.67 07:30 0.67 07:45 0.67 08:00 0.67 08:15 0.67 08:30 1.00 08:45 1.00 09:00 1.00 09:15 1.00 09:30 1.00 09:45 1.00 10:00 1.00 10:15 1.00 10:30 0.67 10:45 0.67 11:00 0.67 11:15 0.67 11:30 0.67 11:45 0.67 12:00 0.67 12:15 0.67 12:30 0.67 12:45 0.67 13:00 0.67 13:15 0.67 13:30 0.67 13:45 0.67 14:00 0.67 14:15 0.67 14:30 0.67 14:45 0.67 15:00 0.67 15:15 0.67 15:30 0.67 15:45 0.67 16:00 1.00 16:15 1.00 16:30 1.00 16:45 1.00 17:00 1.00 17:15 1.00 17:30 1.33 17:45 1.33 18:00 1.33 18:15 1.33 18:30 1.33 18:45 1.33 19:00 1.33 19:15 1.67 19:30 2.00 19:45 2.33 20:00 2.67 20:15 2.33 20:30 2.33 20:45 2.67 21:00 2.67 21:15 2.67 21:30 3.00 21:45 3.33 22:00 3.33 22:15 3.67 22:30 3.67 22:45 4.00 23:00 4.33 23:15 4.67 23:30 4.33 23:45 4.00