A large, Earth-facing X-class coronal mass ejection (CME) or "solar flare" occured on 7 January 2014. The effects of this event should reach Earth sometime on the 9-10th January. NOAA's Space Weather Prediction Center have forecast a G3 (strong) geomagnetic storm. Aurorae may be visible to the naked eye from southern coasts in South Australia.
For up-to-date forecast information visit http://www.swpc.noaa.gov/