Contour lines are lines that signifies the elevation on a mountain or hill
Answer:
The Richter scale measures the largest wiggle (amplitude) on the recording, but other magnitude scales measure different parts of the earthquake. The USGS currently reports earthquake magnitudes using the Moment Magnitude scale, though many other magnitudes are calculated for research and comparison purposes.
If my math is right its A) 7
because 189 divided by 27 is 7
