Decoding the World’s Largest Volcano

After decades of work and a series of state-of-the-art oceanographic expeditions, one of the world’s most confounding geologic mysteries is slowly coming into focus.

The object of interest is the Tamu Massif in the western Pacific Ocean, a New Mexico-sized bump in the oceanic crust that constitutes the world’s largest volcano. This superlative was only bestowed in 2013, when the enormous feature was declared a single structure; the recency of the finding highlights the inherent difficulty

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