History of geophysics

The study of how ideas, methods, instruments, and institutions for investigating Earth’s physical properties developed over time.

Connect

William Gilbert: An English physician whose 1600 book argued that Earth behaves like a giant magnet. His magnetic model helped turn Earth into an object of experimental physical study.
Seismology: The study of earthquakes and seismic waves traveling through Earth. Earthquake waves revealed deep structure that direct observation could not reach.
Magnetic declination: The angle between geographic north and the direction a compass points toward magnetic north. Its practical measurement connected geomagnetism with navigation and mapping.
Emil Wiechert: A German geophysicist who developed influential models of Earth’s layered interior. His work helped establish seismology as a tool for studying internal structure.
Seafloor spreading: The process by which new oceanic crust forms at mid-ocean ridges and moves outward. Its acceptance connected ocean-floor observations with moving continents.
Isaac Newton: An English mathematician and physicist who formulated laws of motion and universal gravitation. His theory of gravity made Earth’s shape and internal density quantitative problems.
Geomagnetism: The study of Earth’s magnetic field, its sources, and its variations. Magnetic measurement became one of geophysics’ earliest global methods.
Marine geophysics: The use of physical measurements to investigate the seafloor and subsurface beneath oceans. Ocean surveys expanded geophysics beyond land and exposed previously unknown crustal structure.
Beno Gutenberg: A German-American seismologist known for research on earthquake waves and Earth’s interior. His analyses clarified seismic boundaries and the depth distribution of earthquakes.
Paleomagnetism: The study of the record of Earth’s ancient magnetic field preserved in rocks and sediments. Magnetic reversals and remanence supplied key evidence for seafloor spreading.