John Castagna

{{short description|American geophysicist}}

John Castagna is an American geophysicist, known for the Mudrock line, currently the Margaret S. and Robert E. Sheriff Endowed Faculty Chair in Applied Seismology at the University of Houston and formerly the Edward L. McCullough Chair.{{Cite web |url=http://www.uh.edu/nsm/earth-atmospheric/people/faculty/john-castagna/ |title=John Castagna |publisher=uh.edu |accessdate=May 12, 2017}}{{Cite web |url=https://scholar.google.com/citations?user=zfdfvBMAAAAJ&hl=en |title=John Castagna |publisher=scholar.google.com |accessdate=May 12, 2017}}