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Car demolition derbies last minutes, but when it comes to a giant iceberg near Antarctica it takes a bit longer. The Moderate Resolution Imaging Spectroradiometer (MODIS) on board the Terra and Aqua satellites captured images of iceberg B-15A steaming a steady course towards the extended Drygalski Ice Tongue and scientists expected the Long Island, NY sized berg to initiate a colossal collision by January 15. Instead B15A appears to have grounded on a submarine shoal when it was just 2.5 miles from the glacier. Continued observations of the area on the eve of what is expected to be renewed iceberg movements have shown a sudden break up sea ice around the iceberg.
The image also reveals that the B-15A iceberg has drifted away from the Drygalski Ice Tongue. The massive iceberg had been on course to strike the ice tongue in what could have been a collision of giants. The Drygalski Ice Tongue is a floating extension of a land-based glacier. Such ice tongues have been known to break under smaller strains, and according to NASA scientist Robert Bindschadler, the Drygalski Ice Tongue has never experienced a blow of the magnitude that B-15A could deliver. The iceberg had been moving steadily towards the ice tongue, but its movement slowed in late December. Just as the gap between the two narrowed to less than 2.5 miles (4 kilometers) , the iceberg rotated slightly and may have become grounded. By January 13, the gap widened as the iceberg appeared to reverse its course, perhaps in response to being grounded, says Bindschadler.