How are earthquakes measured

The mercalli and Richter scale

how earth quakes happen...

Earthquakes happen when tectonic plates move and flex until they unleash an epic amount of energy.

Meet the scales

these are the scales

How are the scales different.

The Richter scale and the mercalli scale are different because the Richter scale uses the magnitude of the strongest seismic wave. On the other hand the mercalli scale uses the observations of people who had gone through the earthquake to estimate the strength of the earthquake, thus making the Richter scale more accurate.