Pioneering geologist sought to demystify volcanic eruptions

New book recounts the life and career of an influential American volcanologist

Thomas Jaggar at Kilauea

PIONEERING SCIENTIST  The new book The Last Volcano chronicles the life of volcanologist Thomas Jaggar. Jaggar, second from left, is shown here measuring lava at Hawaii’s Kilauea volcano in 1917. 

U.S. Geological Survey/Wikimedia Commons

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