Bill Chadwick from Oregon State University is the scientist you see interviewed in the NBC story about the Marianas Trench Marine National Monument. He just finished up a research cruise in the Marianas where they visited NW Rota, an undersea volcano off the coast of, you guessed it, Rota. NW Rota is also one of the 21 seamounts that are a part of the monument.
The expedition has a blog with some video of the underwater vents and a few pictures. Check it out.