Newly Discovered Mega-Volcano Off Philippines Has Biggest Caldera on Earth

A team including members from GNS Science have identified an ancient mega-volcano that could have the largest known caldera on Earth.
The 150km (93.2 miles) wide feature is on the crest of Benham Rise, an oceanic plateau off the Philippines coast. In comparison, the caldera at Taupō is about 35km (21.8 miles) wide, and that at Yellowstone about 60km (37.3 miles).

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