Question

which statement describes one aspect of an earthquakes magnitude? it is measured by the mercalli scale. it is based on the size of seismic waves. it is not usually affected by the amount of fault movement. it is used to determine damage caused by earthquakes.

Explanation:

Earthquake magnitude is determined by the amplitude of seismic waves (measured by seismographs). The Mercalli scale measures intensity (not magnitude). Magnitude is affected by fault movement (more movement often = larger magnitude). Intensity (not magnitude) is used to determine damage.

Answer:

It is based on the size of seismic waves.