List of magnetic storms in December 2012
Location — Tver (geographic coordinates — 56.87 N 35.92 E | time zone UTC+03 )
Days with geomagnetic disturbances — 1
17 December 2012 — geomagnetic disturbances
Changes in the maximum daily geomagnetic index Kp in December 2012 for mid latitudes
Location — Tver (geographic coordinates — 56.87 N 35.92 E | time zone UTC+03 )

Location — Tver (geographic coordinates — 56.87 N 35.92 E | time zone UTC+03 )
17 December 2012 — geomagnetic disturbances
Solar radio flux (10.7 cm) = 122
Mean planetary A index = 10
Mean planetary Kp index = 4