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Ars Technica

Small undersea volcanoes may unleash outsized tsunamis

Wednesday, September 23, 2026


Imaging conducted after the 2022 eruption of Hunga Tonga-Hunga Ha'apai volcano revealed new details about how the caldera collapsed. The eruption and subsequent collapse generated a tsunami that caused significant damage across the Pacific region. Researchers used the post-eruption data to study the relationship between underwater volcanic collapse and tsunami generation.

Original reporting: https://arstechnica.com/science/2026/09/small-undersea-volcanoes-may-unleash-outsized-tsunamis/

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