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Models of Earth

Question 11 • CA-Earth and Space Science B-CR

Which scale is good for small nearby earthquakes but not as useful for larger or distant ones?

Answer
A
Mercalli scale
B
Richter scale
C
moment magnitude scale

Explanation

The Richter scale measures the strength of nearby earthquakes using seismic-wave amplitudes, so it works well for smaller, local events. It becomes less reliable for larger earthquakes because its readings can saturate, and it is not as useful for distant events; the moment magnitude scale is preferred for those cases. The correct choice is the Richter scale.

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