List of magnetic storms in December 2025
Location — Hartford (geographic coordinates — 41.77 N -72.68 W | time zone UTC-05)
Days with magnetic storms — 4
03 December 2025 — Magnetic storm of level G2
04 December 2025 — Magnetic storm of level G1
10 December 2025 — Magnetic storm of level G2
12 December 2025 — Magnetic storm of level G1
Days with geomagnetic disturbances — 2
06 December 2025 — geomagnetic disturbances
11 December 2025 — geomagnetic disturbances
Maximum of solar activity in December 2025
Solar radio flux (10.7 cm) = 214
Mean planetary A index = 33
Mean planetary Kp index = 6.67