List of magnetic storms in December 2009
Location — Peterborough (geographic coordinates — 44.3 N -78.34 W | time zone UTC-05)
There were no days with an increased level of geomagnetic disturbance in December 2009
Maximum of solar activity in December 2009
Solar radio flux (10.7 cm) = 87
Mean planetary A index = 4
Mean planetary Kp index = 3