Question

explain me measurements of earthquake​

Answer 1

The Richter magnitude scale is a scale of numbers used to tell the size of earthquakes. Charles Richter developed the Richter Scale in 1935. His scale was based on the seismogram measured by a particular type of seismometer at a distance of 100 kilometres (62 mi) from the earthquake.

Earthquakes 4.5 or higher on the Richter scale can be measured by tools all over the world. An earthquake a size that scores 3.0 is about 10 times the amplitude of one that scores 2.0. The energy that is released increases by a factor of about 32.

Every increase of 1 on the Richter scale is 10, not 1, therefore it is a logarithmic scale.