How new is it? I was under the impression that Kilauea in Hawaii was the "newest" (or Lōʻihi if you want to get technical)
And Lōʻihi is still underwater, likely for thousands of years yet.
[1] http://rt.com/news/224879-island-tonga-volcanic-eruption/
[2] http://www.stuff.co.nz/world/south-pacific/65103454/tonga-vo...