The strength of earthquakes is measured on the Richter magnitude scale, with valuestypically between 0 and 8 where 8 is the most severe. The Gutenberg–Richter equation gives the average number of earthquakes per year, N,which have a magnitude of at least M. For a particular region the equation is log10 N=a-M, for somea∈ℝ. This region has an average of 100 earthquakes per year with a magnitude of at least 3.The equation for this region can also be written asN=b10M.The expected length of time, in years, between earthquakes with a magnitude of atleast M is1N. Within this region the most severe earthquake recorded had a magnitude of 7.2.

The strength of earthquakes is measured on the Richter magnitude scale, with valuestypically between $0$ and $8$ where $8$ is the most severe.

The Gutenberg–Richter equation gives the average number of earthquakes per year, $N$,which have a magnitude of at least $M$. For a particular region the equation is

${\log }_{10} N=a-M$, for some$a\in \mathrm{ℝ}$.

This region has an average of $100$ earthquakes per year with a magnitude of at least $3$.

The equation for this region can also be written as$N=\frac{b}{{10}^M}$.

The expected length of time, in years, between earthquakes with a magnitude of atleast $M$ is$\frac{1}{N}$.

Within this region the most severe earthquake recorded had a magnitude of $7.2$.