I wonder if interference between these waves might contribute to the formation of giant rogue waves: http://news.nationalgeographic.com/news/2004/08/0810_040810_...

10mHz, thats once per 100 seconds. What kind of ocean waves are these?

I don't think the waves are doing anything at that frequency. They are just providing the force that keeps the planet resonating at its natural frequency. This is my best guess.

As a surfer I already think waves are incredible...this just confirms it! Ocean waves are an amazing thing. Lots of untapped energy.

Yeah, and now that we know where it's coming from, please don't screw with the hum and kill us all, k?