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Geophysics examples

One executed example per breakthrough in Breakthroughs in Geophysics, in chronological order, each with an asserted check of the result it shows. Download the Python source or notebook from each page. Geophysics: units, equations and validation records units and limits; all examples use deterministic synthetic inputs and require no downloads.

Gilbert’s magnetic Earth (1600)

Gilbert's magnetic Earth (1600)

Newton’s oblate Earth (1687)

Newton's oblate Earth (1687)

Clairaut’s theorem (1743)

Clairaut's theorem (1743)

Bouguer’s mountain attraction (1749)

Bouguer's mountain attraction (1749)

Cavendish weighs the Earth (1798)

Cavendish weighs the Earth (1798)

Gauss’s spherical-harmonic geomagnetic field (1839)

Gauss's spherical-harmonic geomagnetic field (1839)

Stokes’s geoid formula (1849)

Stokes's geoid formula (1849)

Brunhes’s reversed magnetization (1906)

Brunhes's reversed magnetization (1906)

Love numbers (1909)

Love numbers (1909)

Larmor’s self-exciting dynamo (1919)

Larmor's self-exciting dynamo (1919)

Matuyama’s reversed epoch (1929)

Matuyama's reversed epoch (1929)

Runcorn’s apparent polar wander (1956)

Runcorn's apparent polar wander (1956)

Rikitake’s two-disc dynamo (1958)

Rikitake's two-disc dynamo (1958)

King-Hele’s flattening from satellite orbits (1958)

King-Hele's flattening from satellite orbits (1958)

Cox, Doell and Dalrymple’s polarity timescale (1964)

Cox, Doell and Dalrymple's polarity timescale (1964)

GRACE gravity changes (2002)

GRACE gravity changes (2002)