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): Douglas Sirk • Peter II of Portugal • Rudolf Hess • Sandra Schmitt • Vicente Aleixandre
Born in the same month (April 1900): Adolf Dymsza • Bertha Isaacs • Camille Chamoun • Elizabeth Goudge • Gladwyn Jebb • Heinrich Müller (Gestapo) • Herbert Bayer • Jim Bottomley • Marie Byles • Pierre Molinier • Rhea Silberta • Richard Hughes (British writer) • Stefanie Clausen • Tebbs Lloyd Johnson