Geomagnetic storms in Thunder bay in December 2004
Time zone — UTC−05 (Thunder bay | 48.42 N 89.28 W)
Geomagnetic storm calendar in December 2004 by time in Thunder bay
Days with magnetic storms — 7 Days with geomagnetic disturbances — 11
Ap and F10.7 index values in December 2004
Maximum value of the Ap index for the month — 36 Maximum value of the F10.7 index for the month — 111 Maximum value of the Kp index for the month — 5