there were some warning signs (Score 2, Informative)

There was a huge earthquake (8.1 on Richter) south of Tasmania 3 days before. It made headlines http://www.bloomberg.com/apps/news?pid=10000081&si d=aUIanL7wC_m8&refer=australia/ but fortunately no victims. However if you look at a map of tectonic plates http://geology.about.com/library/bl/maps/blplatesw topoehem.htm/ and compare it with the location of the earthquake http://www.iris.edu/seismon/ you can see it happened at the southern tip of the Indian plate. Now 3 days later on the middle of the eastern edge of the same plate another huge earthquake...looks like plate movement to me.