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NATIONAL RICHTER SCALE DAY – April 26

NATIONAL RICHTER SCALE DAY

National Richter Scale Day on April 26th each year honors the birth of the Richter Scale inventor, Charles F. Richter (April 26, 1900 – September 30, 1985).

Richter was an American seismologist and physicist most famous as the inventor of the Richter magnitude scale, which quantified the size of earthquakes. While working at the California Institute of Technology, with Beno Gutenberg, Richter first used the scale in 1935.

After publishing the Richter Scale in 1935, it immediately became the standard measure of earthquake intensity. Since 1935, there have been other magnitude scales developed. Depending on the data available, different scales are used. However, most are not as popularly known as Richter Scale.

The United States Geological Service records show that the most significant earthquake since 1900, was in Chile in May 1960.  Measuring 9.5 on the Richter Scale, it is known as the Great Chilean Earthquake. 

Following is a link of the ten largest earthquakes: http://www.infoplease.com/ipa/A0763403.html

HOW TO OBSERVE #NationalRichterScaleDay

Learn more about earthquake activity. Watch a documentary or read a book about Charles F. Richter and his invention. Use #NationalRichterScaleDay to post on social media.

NATIONAL RICHTER SCALE DAY HISTORY

Although the day commemorates the birth of Charles F. Richter, National Day Calendar continues researching the founders of this seismic holiday.

There are over 1,500 national days. Don’t miss a single one. Celebrate Every Day® with National Day Calendar®!

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