Richter Scale Day

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April 26 is the birthday of Charles Francis Richter, the famous seismologist and physicist and most of all famous as the creator of the Richter magnitude scale

#RichterScaleDay #NationalRichterScaleDay

Sources:

• http://www.holidayinsights.com/moreholidays/April/richterscaleday.htm
• https://en.wikipedia.org/wiki/Charles_Francis_Richter