Storm swells in Alaska caused the breakup of the one time world's largest floating iceberg halfway around the globe in Antarctica:

Glaciologists studying the gigantic B-15A iceberg, which broke up in October 2005, have discovered that it fragmented as it was being buffeted by a wave whipped up by a violent storm in the Gulf of Alaska six days before.

The swell travelled a staggering 13,500 kilometres before reaching the iceberg, which measured some 100 by 30 kilometres and was floating just off Cape Adare, at the tip of Antarctica's Victoria Land region.

...By comparing the arrival times of faster and slower-moving wavelengths of the swell, the team calculated the storm responsible had, surprisingly, originated almost on the far side of the globe. Buoy measurements confirmed that 10 metre-tall waves were spotted in the Gulf of Alaska during its storm, and 5 metre waves showed up in Hawaii two days after that. The researchers report their discovery in the journal Geophysical Research Letters.

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