11 09 2015 15-minute Estimated Geomagnetic Activity Index UT:min Kp 00:00 3.33 00:15 3.00 00:30 3.00 00:45 3.00 01:00 3.00 01:15 3.00 01:30 3.00 01:45 3.00 02:00 3.33 02:15 3.33 02:30 3.00 02:45 3.00 03:00 3.00 03:15 3.00 03:30 3.33 03:45 3.67 04:00 4.00 04:15 4.00 04:30 4.00 04:45 4.00 05:00 4.00 05:15 4.00 05:30 4.00 05:45 4.00 06:00 4.00 06:15 4.00 06:30 3.67 06:45 4.00 07:00 4.33 07:15 5.00 07:30 5.00 07:45 5.67 08:00 5.67 08:15 6.00 08:30 6.33 08:45 6.00 09:00 6.33 09:15 6.00 09:30 6.00 09:45 6.00 10:00 5.67 10:15 6.00 10:30 5.67 10:45 5.67 11:00 5.67 11:15 5.33 11:30 5.67 11:45 5.33 12:00 5.33 12:15 5.33 12:30 5.33 12:45 5.33 13:00 5.00 13:15 5.00 13:30 5.00 13:45 5.00 14:00 5.00 14:15 5.00 14:30 4.67 14:45 4.67 15:00 4.67 15:15 4.67 15:30 4.67 15:45 4.67 16:00 4.67 16:15 4.67 16:30 4.67 16:45 4.33 17:00 4.33 17:15 4.33 17:30 4.33 17:45 4.33 18:00 4.33 18:15 4.33 18:30 4.33 18:45 4.00 19:00 4.00 19:15 4.33 19:30 4.00 19:45 4.00 20:00 4.00 20:15 4.00 20:30 3.67 20:45 3.67 21:00 3.67 21:15 3.67 21:30 3.67 21:45 3.67 22:00 3.67 22:15 3.67 22:30 3.67 22:45 3.67 23:00 3.67 23:15 3.67 23:30 3.67 23:45 3.33