Charles Richter

Charles Francis Richter was an American seismologist and physicist. He is the namesake and one of the creators of the Richter magnitude scale, which, until the development of the moment magnitude scale in 1979, was widely used to quantify the size of earthquakes. Inspired by Kiyoo Wadati's 1928 paper on shallow and deep earthquakes, Richter first used the scale in 1935 after developing it in collaboration with Beno Gutenberg; both worked at the California Institute of Technology.

26 April 1900

Born on the same birth date (26 April 1900): Eva Aschoff • Hack Wilson

Born on the same birth day (26 April): Anna Mucha • April 26 • Christian Leopold von Buch • Colin Scotts • Gian Paolo Lomazzo • Israr Ahmed • Jadwiga Staniszkis • James Holt (historian) • Jordana Brewster • Kurt Bodewig • Marilyn Nelson • Ms. Dynamite • Peter Madsen (footballer) • Richard Bradshaw (conductor) • Sandra Schmitt • Václav Varaďa

Born in the same month (April 1900): Albert Walsh • Alfred Strange • Alice Berry • Anis Fuleihan • Elizabeth Goudge • Hack Wilson • Iracema de Alencar • Joseph Green (actor) • Marie Byles • Ramón Iribarren • Rhea Silberta • Roberto Arlt • Roland Michener • Roman Steinberg • Spencer Tracy • Sándor Márai • Wolfgang Pauli