While they are quick to point out that Faith had killed a volcanologist, not a Vulcan, they watch Faith exercise in the back yard with fascination over this other Slayer.
Dwight R. "Rocky" Crandell (1923 - April 6, 2009) was an American volcanologist who alongside Donal R. Mullineaux correctly predicted that Mount St. Helens would erupt before the end of the 20th century.
Garniss H. Curtis, (born May 27, 1919 ~ died December 19, 2012) was a professor emeritus of geology at the University of California, Berkeley, geochronologist, volcanologist, geophysicist, and founder of the Berkeley Geochronology Center.
Haraldur Sigurdsson (born 1939), Icelandic volcanologist and geochemist
During his time on the faculty at Heidelberg, one of his famous students was the American volcanologist Thomas Jaggar.