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(CNN) — An unknown volcano erupted so explosively in 1831 that it cooled Earth’s climate. Now, nearly 200 years later, scientists have identified the “mystery volcano.” The eruption was ...

"When we used magnetotellurics, we were able to see, actually, there’s not a lot there," said Ninfa Bennington, lead author on the study and a research geophysicist at the Hawaiian Volcano Observatory ...