Earth Quakes Informations - Measuring Intensity
 

 

 
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Earth Quake Information - Measuring Intensity
 

Measuring Intensity

Richter Magnitude Scale
In 1935 Charles F. Richter developed the Richter Magnitude Scale to mathematically rate how much force an earthquake releases based on seismograph readings. The scale takes into account the distance between various seismographs, the density of the ground and other factors to give a number for reference. Each increase in whole number on the scale is ten times the measured amplitude (strength) of the previous and corresponds to about 31 times more energy released by the quake.

Uncounted numbers of quakes less than 2.0 happen each year with several thousand over 4.5 on the scale. The highest on the scale and most damaging have had magnitudes of 8.0 to 8.9. Quakes in this range occur about once per year. The simplified version below gives an idea of how the scale works.
 
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