List of magnetic storms in September 2011
Location — Mirny (Sakha Republic) (geographic coordinates — 62.05 N 113.95 E | time zone UTC+09)
Days with magnetic storms — 9
09 September 2011 — Magnetic storm of level G1
10 September 2011 — Magnetic storm of level G3
11 September 2011 — Magnetic storm of level G1
13 September 2011 — Magnetic storm of level G1
17 September 2011 — Magnetic storm of level G2
18 September 2011 — Magnetic storm of level G2
26 September 2011 — Magnetic storm of level G1
27 September 2011 — Magnetic storm of level G4
28 September 2011 — Magnetic storm of level G1
Days with geomagnetic disturbances — 2
12 September 2011 — geomagnetic disturbances
29 September 2011 — geomagnetic disturbances
Maximum of solar activity in September 2011
Solar radio flux (10.7 cm) = 190
Mean planetary A index = 67
Mean planetary Kp index = 8