Definition

the Richter scale: the system used to measure the strength of an earthquake idiom
The Richter scale is a measurement of seismic activity named after American scientist Charles Richter.
a scale: a ranking, a ratio, a measurement noun
  • "Seismic experts measured it at nearly 6.0 on the Richter scale."
  • "China: an earthquake measuring 8.1 on the Richter scale has hit central China, leaving 6,000 people dead and the Chinese city of Xangxingxongdo in ruins."

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