Must be largely inactive. Otherwise, there'd be a sizable landmass above it, one would think.
Ya rly. Otherwise, "West Hawaii" would be there.
("According to Sager, Tamu Massif is believed to be about 145 million years old, and it became inactive within a few million years after it was formed.")
So it would be number one on your Top Volcano list?
One big eruption from that thing and the Palins will be able to walk to Russia from their home!
That's a volcano that's been doing its super squats.