NUKU’ALOFA, Tonga (AFP) – The Tonga volcanic eruption unleashed explosive forces that dwarfed the power of the Hiroshima atomic bomb, NASA scientists have said, as survivors on Monday described how the devastating Pacific blast “messed up our brains”. The NASA Earth Observatory said the Hunga Tonga-Hunga Ha’apai volcano spewed debris as high as 40 kilometres (25 miles) into the atmosphere during the January 15 eruption that triggered huge tsunami waves. “We think the amount of […]