Thomas Jaggar, American volcanologist (died 1953)

Thomas Jaggar

American volcanologist (1871–1953)

Thomas Augustus Jaggar Jr. was an American volcanologist. He founded the Hawaiian Volcano Observatory and directed it from 1912 to 1940. The son of Thomas Augustus Jaggar, Jaggar Jr. graduated with a PhD in geology from Harvard University in 1897. In 1902, he was one of the…