Basically due to fundamentals like cheap oil FX:USOIL , iron ore, coal and metals like copper FX:COPPER . Main consumer worldwide and in this region is China. China's economy is slowing down after years of +7% growth.
One of China's big supplier is Australia. http://atlas.media.mit.edu/en/visualize/tree_map/hs92/import/chn/aus/show/2013
Australia's currency devalues with cheap .
Watch out for the main event for GBPAUD .
Interest Rate in Australia is reported by the Reserve Bank of Australia this week.