HVO Scientists-in-Charge Thomas Jaggar and Tina Neal

Thomas A. Jaggar, shown at his desk circa 1925, founded the Hawaiian Volcano Observatory in 1912 and served as its Director until he retired in 1940. Since then, volcano monitoring and research efforts in Hawaii have been guided by 19 scientists who have served as HVO's "Director" or "Scientist-in-Charge." In 2015, Christina Neal (inset) became HVO's most recent Scientist-in-Charge.