On Saturday, the volcano at Hunga Tonga-Hunga Ha’apai erupted, sending ash plumes 30 kilometres into the atmosphere, kicking off a tsunami in Tonga that reached as far away as Alaska, and destroying a volcanic cone that connected the uninhabited islands of Hunga Tonga and Hunga Ha’apai. The volcano is around 65 kilometres northwest of Tongan capital, Nuku’alofa, with experts saying it was one of the most powerful eruptions since the 1990s. “The sea level gauge at Nuku’alofa, Tonga, recorded a tsunami wave of 1.19 metres before it stopped reporting,” Dr Hannah Power of the University of Newcastle said. “Waves of...