& {( z$ l. H# m+ S(Dec 19 to Dec 21) The geomagnetic field is expected to be at active to major storm levels on Dec 20 (19 Dec), quiet to active levels on Dec 21 (20 Dec) and quiet to unsettled levels on Dec 22 (21 Dec).. n* }5 G9 N0 T7 \
* X% n, |7 m3 a. P$ f& S) l( m
是不是说明今晚看到极光的概率很大呀?