Huge blocks of ice calved off and collapsed into tidal waves of icy slush.

BBC: Patagonia��s ice-carved waterways

The Petermann Glacier last birthed or "calved" a massive iceberg two years ago, in August 2010.

MSN: Iceberg bigger than Manhattan breaks free - Technology & science - Science - OurAmazingPlanet | NBC News

Satellite images have revealed that three massive icebergs have been calved from the Ronne Ice Shelf in the Weddell Sea on the Antarctic coast.

BBC: Three giant bergs calved in Antarctic

Iceberg A-44 is believed to have calved in the afternoon or evening of 6 May at or near the time that A-43 broke in half.

BBC: Three giant bergs calved in Antarctic

It is known to have calved from the Ronne Ice Shelf sometime during the afternoon or evening of 4 May as satellite imagery indicates that the ice shelf was still intact on that morning.

BBC: Three giant bergs calved in Antarctic