List of magnetic storms in September 2004
Location — Sarnia (geographic coordinates — 42.99 N -82.4 W | time zone UTC-04 - summer time)
Days with magnetic storms — 5
14 September 2004 — Magnetic storm of level G1
16 September 2004 — Magnetic storm of level G1
17 September 2004 — Magnetic storm of level G1
18 September 2004 — Magnetic storm of level G1
22 September 2004 — Magnetic storm of level G1
Days with geomagnetic disturbances — 6
06 September 2004 — geomagnetic disturbances
07 September 2004 — geomagnetic disturbances
08 September 2004 — geomagnetic disturbances
13 September 2004 — geomagnetic disturbances
20 September 2004 — geomagnetic disturbances
23 September 2004 — geomagnetic disturbances
Maximum of solar activity in September 2004
Solar radio flux (10.7 cm) = 131
Mean planetary A index = 28
Mean planetary Kp index = 5