Geomagnetic Storms in December, 2025
17 storms ↑ MAX: Kp 8 ↓ MIN: Kp 0.2
17 storms ↑ MAX: Kp 8 ↓ MIN: Kp 0.2
In December 2025, 17 geomagnetic storms were recorded; the strongest was Kp 8 on December 10, 2025. The longest run of consecutive active days was 4 (10 Dec–13 Dec).
Most powerful Geomagnetic Storms in December 2025
| Date | Class | Level | Duration |
|---|---|---|---|
| December 10, 2025 | Kp 8 | Severe (G4) | 9 h |
| December 3, 2025 | Kp 7 | Strong (G3) | 20 h |
| December 11, 2025 | Kp 7 | Strong (G3) | 3 h |
| December 21, 2025 | Kp 7 | Strong (G3) | 9 h |
| December 22, 2025 | Kp 7 | Strong (G3) | 12 h |
| December 23, 2025 | Kp 7 | Strong (G3) | 8 h |
| December 1, 2025 | Kp 6 | Moderate (G2) | 3 h |
| December 4, 2025 | Kp 6 | Moderate (G2) | 3 h |
| December 5, 2025 | Kp 6 | Moderate (G2) | 3 h |
| December 12, 2025 | Kp 6 | Moderate (G2) | 12 h |
| December 17, 2025 | Kp 6 | Moderate (G2) | 11 h |
| December 1, 2025 | Kp 5 | Minor (G1) | 3 h |
| December 5, 2025 | Kp 5 | Minor (G1) | 3 h |
| December 13, 2025 | Kp 5 | Minor (G1) | 3 h |
| December 16, 2025 | Kp 5 | Minor (G1) | 3 h |
| December 18, 2025 | Kp 5 | Minor (G1) | 3 h |
| December 24, 2025 | Kp 5 | Minor (G1) | 3 h |