Each of the volume contracts shown for the future months is 1000 ounces of gold.
All together they show 238102 contracts
There are approximately 2471 tonnes mined of gold a year which equals to 79,442,650 ounces of gold.
That means 3 years worth of gold dumped so far.
Chart for Gold April 2013 future contracts.
They decided to do a major smash today. Considering there is a major shortage of Silver happening and countries are asking for their Gold back, the big shorts seem to be dumping their contracts.