List of magnetic storms in December 1999
Region — UTC+0:00
Days with magnetic storms — 3
04 December 1999 — Magnetic storm of level G2
13 December 1999 — Magnetic storm of level G1
31 December 1999 — Magnetic storm of level G1
Days with geomagnetic disturbances — 8
03 December 1999 — geomagnetic disturbances
05 December 1999 — geomagnetic disturbances
06 December 1999 — geomagnetic disturbances
07 December 1999 — geomagnetic disturbances
08 December 1999 — geomagnetic disturbances
09 December 1999 — geomagnetic disturbances
24 December 1999 — geomagnetic disturbances
25 December 1999 — geomagnetic disturbances