Hurricane Ivan may have been a bigger monster than we first thought.
The category three storm caused a path of destruction when its winds came ashore on the northwest Florida Gulf Coast in September 2004.
But scientists estimate its waves were even bigger before it made landfall, more than 90 feet high.
Those could be the tallest waves ever measured with modern instruments.
Ivan sank seven oil platforms and set five adrift, in addition to causing billions of dollars of damage on shore, and leading to the deaths of at least 54 people.
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