• Question: how big is the biggest undersea volcanoe you ever saw

    Asked by jamesstimpson to Jon on 22 Jun 2010 in Categories: .
    • Photo: Jon Copley

      Jon Copley answered on 22 Jun 2010:

      Hi James – this year I was on an expedition that went to an undersea volcano near Antarctica that was about half a mile high on the seafloor.

      I’ve been to bigger ones that are now extinct, but that was the largest one that was still active (it wasn’t actually erupting while we were there, but it had erupted recently, maybe even during the past year, and may do again soon).

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