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The full nature of the eruption? so, the problem we have with this particular volcano is it's an underwater volcano. if a volcano erupts on land, it's reasonably easy to assess the effects of that eruption by looking at fallen trees and you can actually clearly see the blast radius and debris that's flowed out but because this volcano was underwater, it requires quite a significant scientific expedition to actually go out to sea and actually map this area. we assumed, based on the size of the explosion, that an area of about 2000 square kilometres would be affected by this eruption — that's ...

A monstrous eruption which has left its mark on our planet. when hunga tonga—hunga ha'apai blew its top injanuary, it scattered water vapour and ash halfway to space and sent tsunami waves swelling out across the world. a new survey offers a fresh picture of the scale of what happened. scientists have fully mapped the area around the volcano, showing just how badly the sea floor has been sculpted and scarred. we didn't map enough. this volcano even exceeded our maximum expectations about how far the effects of this eruption was on the sea floor, it really was an absolutely outstanding event....