C
- Henry Cavendish (British, 1731–1810) – made first estimate of the mass of the Earth
- Sydney Chapman (British, 1888–1970) – predicted magnetosphere; developed theories for effect of solar wind on geomagnetic storms and aurorae
- Jon Claerbout (American, 1937–) – exploration geophysics
- Alexis Clairaut (French, 1713–1765) – proved Clairaut's theorem and calculated the ellipticity of the Earth
- Vincent Courtillot (French, 1948–) – paleomagnetist; promoted theory that mass extinctions are caused by massive volcanic episodes
- Allan V. Cox (American, 1926–1987) – created a timeline for geomagnetic reversals and was a pioneer in plate tectonics; Vetlesen Prize
- Albert P. Crary (America, 1911–1987) – Arctic and Antarctic exploration, seismology
Read more about this topic: List Of Geophysicists