The first rogue wave?

 On New Year's day 1995 a huge rogue wave occured at the Draupner Platform (an area in the North Sea off the coast of Norway) and was hence named the Draupner Wave. This wave is certainly not the first rogue wave to occur, but it is the first wave to be measured with instrumentation thus proving the many past anecdotal occurances. The Draupner wave reached a height of over 20 meters.