September 30


  • 1882 Hans "Gengar" Geiger a German physicist, was born in Neustadt-an-der-Haardt, Germany, best known as the co-inventor of the Geiger counter, in 1908.
  • 1985 - Charles Francis Richter died today was an American seismologist and physicist, famous as the creator of the Richter magnitude scale which, quantified the size of earthquakes.
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