21 04 2025 15-minute Estimated Geomagnetic Activity Index UT:min Kp 00:00 3.00 00:15 3.33 00:30 3.33 00:45 3.67 01:00 4.00 01:15 4.33 01:30 4.00 01:45 4.00 02:00 4.00 02:15 4.67 02:30 3.67 02:45 4.00 03:00 4.00 03:15 4.00 03:30 4.00 03:45 4.00 04:00 3.67 04:15 3.33 04:30 3.67 04:45 4.00 05:00 3.67 05:15 3.33 05:30 3.33 05:45 3.33 06:00 4.00 06:15 3.67 06:30 4.00 06:45 4.00 07:00 5.00 07:15 4.00 07:30 4.00 07:45 4.33 08:00 4.67 08:15 4.33 08:30 4.33 08:45 4.33 09:00 5.33 09:15 5.00 09:30 4.67 09:45 4.67 10:00 5.00 10:15 4.67 10:30 4.67 10:45 4.67 11:00 4.33 11:15 4.33 11:30 4.33 11:45 4.00 12:00 5.00 12:15 5.00 12:30 4.67 12:45 5.33 13:00 4.33 13:15 4.33 13:30 4.33 13:45 4.33 14:00 4.33 14:15 4.33 14:30 4.00 14:45 4.33 15:00 4.00 15:15 4.33 15:30 4.00 15:45 4.33 16:00 4.33 16:15 4.00 16:30 4.00 16:45 4.00 17:00 4.00 17:15 4.00 17:30 4.00 17:45 4.33 18:00 4.33 18:15 4.00 18:30 4.00 18:45 4.00 19:00 4.00 19:15 3.67 19:30 3.67 19:45 3.67 20:00 3.67 20:15 3.67 20:30 3.67 20:45 3.67 21:00 3.67 21:15 3.33 21:30 3.33 21:45 3.67 22:00 3.33 22:15 3.33 22:30 3.67 22:45 3.67 23:00 3.33 23:15 3.33 23:30 3.33 23:45 3.33