Question

multiple choice question
magnitude is measured on the richter scale using differences in
speed of the seismic waves.
intensity of the seismic waves.
amplitude of seismic waves.

Explanation:

The Richter scale is a logarithmic scale used to measure the magnitude of earthquakes. It is based on the amplitude of seismic waves recorded by seismographs. The intensity of seismic waves (which relates to the damage caused at a particular location) is measured by the Mercalli scale. The speed of seismic waves is a physical property related to the medium through which they travel (e.g., P - waves are faster than S - waves).

Answer:

amplitude of seismic waves.