Sir, In Jude Webber’s article on the Mexico earthquake (“Mexican death toll hits 90 from massive earthquake”, September 10), she reports that quakes are measured on a scale of 0 to 10. More ...

The Richter Scale. The first widely-used method, the Richter scale, was developed by Charles F. Richter in 1934. It used a formula based on the amplitude of the largest wave recorded on a specific ...

The Richter scale, developed by the American geologist Charles Richter in the 1930s, is a "logarithmic" scale, which means that each one-point increase on the scale represents a tenfold increase ...

While it may seem like splitting hairs, the scale used to estimate earthquake magnitude is a logarithmic scale, and small increments matter more than you think. ... is also a logarithmic scale.

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 10.

Logarithmic price scales tend to show less severe price increases or decreases than linear price scales. For example, if an asset price has collapsed from $100.00 to $10.00, the distance between ...