Summary: On September 12th the
interplanetary magnetic (IMF) field near Earth turned south for
nearly 24 hours. South-pointing IMFs render Earth's magnetosphere
vulnerable to solar wind gusts and set the stage for auroras,
which high-latitude observers accordingly spotted on September
otherwise stated, all images are copyrighted by the photographers.
D. Clausen: "The display was unremarkable
until around 02:00 a.m. local time. [Then I saw] a surprising
amount of red -- at times there was very little else but spires
of red aurora. Every storm seems to have it's own unique characteristics,
this was no exception."