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): Bill Wennington • Carol Burnett • Frederick Law Olmsted • Giancarlo Esposito • James Dooley (Australian politician) • John II of France • John Isner • John James Audubon • Jules and Gédéon Naudet • Ludwig Uhland • Michael Smith (chemist) • Morris West • Paul Verner • Steve Lombardozzi • Sylvain Simard • Xenophon Zolotas

Born in the same month (April 1900): Albert Walsh • Elizabeth Goudge • Jan Oort • Leo Robin • Nellie Beer • Ramón Iribarren • Rhea Silberta • Roberto Arlt • Spencer Tracy • Stefanie Clausen • Sándor Márai