"relating to the physics of the earth," 1885; see geophysics + -al (1).
Entries linking to geophysical
geophysics n.
1885, from geo- "earth" + physics.
-al 1
suffix forming adjectives from nouns or other adjectives, "of, like, related to, pertaining to," Middle English -al, -el, from French or directly from Latin -alis (see -al (2)).