A numerical scale for expressing the magnitude of an earthquake on the basis of seismograph oscillations. The more destructive earthquakes typically have magnitudes between about 5.5 and 8.9; the scale is logarithmic and a difference of one represents an approximate thirtyfold difference in magnitude.
More example sentences
- Each unit on the Richter scale represents a thirty-fold increase of energy.
- Seismographs and the Richter scale are just one type of graph that scientists use to measure the world.
- Nine on the Richter scale indicates an earthquake of absolutely awesome destructive power.
1930s: named after Charles F. Richter (1900–85), American geologist.
Definition of Richter scale in:
- The British & World English dictionary