An expedition examining the aftermath of the deadly volcanic eruption near Tonga earlier this year found it shifted enough rock to fill three million Olympic sized swimming pools.
Scientists from New Zealand’s National Institute for Water and Atmospheric Research (NIWA ) studied the after effects of Hunga Tonga–Hunga Ha'apai’s violent explosion in January.
At least six died as a fatal tsunami slammed into the nearby island community, cutting it off from the world and causing around £90million in damage.
