Richter scale of earthquake magnitude

Table
Richter scale of earthquake magnitude
magnitude level category effects earthquakes per year
less than 1.0 to 2.9 micro generally not felt by people, though recorded on local instruments more than 100,000
3.0-3.9 minor felt by many people; no damage 12,000-100,000
4.0-4.9 light felt by all; minor breakage of objects 2,000-12,000
5.0-5.9 moderate some damage to weak structures 200-2,000
6.0-6.9 strong moderate damage in populated areas 20-200
7.0-7.9 major serious damage over large areas; loss of life 3-20
8.0 and higher great severe destruction and loss of life over large areas fewer than 3
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Universalium. 2010.

Look at other dictionaries:

  • Richter scale — a scale, ranging from 1 to 10, for indicating the intensity of an earthquake. [1935 40; after Charles F. Richter (1900 85), U.S. seismologist] * * * Widely used measure of the magnitude of an earthquake, introduced in 1935 by U.S. seismologists… …   Universalium

  • Richter scale — ► NOUN ▪ a logarithmic scale for expressing the magnitude of an earthquake on the basis of seismograph oscillations. ORIGIN named after the American geologist Charles F. Richter (1900 85) …   English terms dictionary

  • Richter scale —  for the standard measure of earthquake magnitudes. It is named for Charles Richter (1900–1985) of the California Institute of Technology, who invented it in the 1930s. The scale increases at a rate that is exponential rather than linear, making… …   Bryson’s dictionary for writers and editors

  • Richter scale —    for the standard measure of earthquake magnitudes. It is named for Charles Richter of the California Institute of Technology, who invented it in the 1930s. The scale increases at a rate that is exponential rather than linear, making each level …   Dictionary of troublesome word

  • earthquake magnitude —   a mathematical measure of the strength of an earthquake based on the maximum amplitude of the seismic waves produced.   See Richter scale …   Geography glossary

  • Richter scale — noun Etymology: Charles F. Richter Date: 1938 an open ended logarithmic scale for expressing the magnitude of a seismic disturbance (as an earthquake) in terms of the energy dissipated in it with 1.5 indicating the smallest earthquake that can be …   New Collegiate Dictionary

  • Richter scale — /ˈrɪktə skeɪl / (say riktuh skayl) noun an open ended logarithmic scale used to express the magnitude or total energy of a seismic disturbance (as an earthquake). In this scale an increase of 1 indicates a tenfold increase in energy. Recorded… …   Australian English dictionary

  • Richter scale — Rich′ter scale n. gel a logarithmic scale for expressing the magnitude of an earthquake, a measurement under 5 considered minor and over 7 indicating major destruction • Etymology: 1935–40; after Charles F. Richter (1900–85), U.S. seismologist …   From formal English to slang

  • Richter scale — [ rɪktə] noun Geology a logarithmic scale for expressing the magnitude of an earthquake on the basis of seismograph oscillations. Origin 1930s: named after the American geologist Charles F. Richter …   English new terms dictionary

  • earthquake — /errth kwayk /, n. 1. a series of vibrations induced in the earth s crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating. 2. something that is severely disruptive; upheaval. [1300 50; ME erthequake …   Universalium

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