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This post offers reasons for using logarithmic scales, also called log scales, on charts and graphs. It explains when logarithmic graphs with base 2 are preferred to logarithmic graphs with base ...
But that number is based on a logarithmic scale, and can be hard to grasp. Earthquakes aren't measured linearly, but in orders of magnitude.
Logarithmic scales have other advantages as well. Returning to the APPL charts above, it is impossible to imagine drawing a trendline connecting the series of lows in 2003 on up through 2008.
There is disagreement on the proper way to label logarithmic scales in charts and graphs, especially when the base is not 10. This post shows several alternative ways of labeling log scales ...
This example uses a DATA step to generate data. The PROC PLOT step shows two plots of the same data -- one plot without a horizontal axis specification and one plot with a logarithmic scale specified ...
More precisely, the Richter scale is logarithmic, so the amplitude of a magnitude 8 quake is 10 times greater than that of a magnitude 7 quake.