AlohaYes, I know the volcanos on Oahu are on longer active, but the hot rocks are still down there somewhere. Who knows? maybe an udersea cable from the big isalnd would be practical.
Oahu has moved away from the vents that made that island (really) Oahu used to be where the big island is now. A Loooooong time ago. Even not a new island is building south east . Read somewhere the island will break the oceans surface in 5000 years. I do not expect to be there to watch. :giggle:
I haven't seen or read recently about the status of an undersea cable, but eventually I am sure one will connect the islands in our lifetime.