AdvertisementNASA scientists estimate Tonga blast at 10 megatonsJanuary 18, 2022Geoff BrumfielfacebookEmailThe island of Hunga Tonga-Hunga Ha'apai as imaged by the satellite company Maxar on Jan. 6 (left) and Jan. 18 (right). It was obliterated in a volcanic eruption that scientists estimate was 10 megatons in size. (Satellite image ©2022 Maxar Technologies)