21 03 2007 15-minute Estimated Geomagnetic Activity Index UT:min Kp 00:00 -1.00 00:15 -1.00 00:30 -1.00 00:45 -1.00 01:00 -1.00 01:15 -1.00 01:30 0.67 01:45 0.67 02:00 0.67 02:15 1.00 02:30 1.00 02:45 1.00 03:00 1.00 03:15 1.00 03:30 1.00 03:45 0.67 04:00 0.67 04:15 1.00 04:30 1.00 04:45 1.00 05:00 1.00 05:15 1.00 05:30 0.67 05:45 0.67 06:00 0.67 06:15 -1.00 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 1.00 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 0.67 16:15 0.67 16:30 0.67 16:45 0.67 17:00 0.67 17:15 0.67 17:30 0.67 17:45 0.67 18:00 0.67 18:15 0.67 18:30 0.67 18:45 0.67 19:00 0.67 19:15 0.67 19:30 0.67 19:45 0.67 20:00 0.67 20:15 0.67 20:30 0.67 20:45 0.67 21:00 0.67 21:15 0.67 21:30 0.67 21:45 0.67 22:00 0.67 22:15 0.67 22:30 0.67 22:45 0.67 23:00 0.67 23:15 0.67 23:30 0.67 23:45 0.67