List of magnetic storms in December 2004
Location — Sarnia (geographic coordinates — 42.99 N -82.4 W | time zone UTC-05)
Days with magnetic storms — 7
01 December 2004 — Magnetic storm of level G1
06 December 2004 — Magnetic storm of level G1
07 December 2004 — Magnetic storm of level G1
11 December 2004 — Magnetic storm of level G1
12 December 2004 — Magnetic storm of level G1
21 December 2004 — Magnetic storm of level G1
22 December 2004 — Magnetic storm of level G1
Days with geomagnetic disturbances — 11
05 December 2004 — geomagnetic disturbances
09 December 2004 — geomagnetic disturbances
16 December 2004 — geomagnetic disturbances
17 December 2004 — geomagnetic disturbances
18 December 2004 — geomagnetic disturbances
24 December 2004 — geomagnetic disturbances
25 December 2004 — geomagnetic disturbances
28 December 2004 — geomagnetic disturbances
29 December 2004 — geomagnetic disturbances
30 December 2004 — geomagnetic disturbances
31 December 2004 — geomagnetic disturbances
Maximum of solar activity in December 2004
Solar radio flux (10.7 cm) = 111
Mean planetary A index = 36
Mean planetary Kp index = 5