The Hunga Tonga–Hunga Ha'apai volcanic eruption in December 2021 was the most violent in 140 years, and we are still learning from its aftermath. A recent study focuses on the eruption's incredible underwater flows, which damaged nearly 200 kilometers of underwater cables. (Image credit: eruption - Tonga Geological Services, illustration - APS/C. Cain; research credit: M. Clare et al.; via APS Physics)












