The Richter scale is used, from 0.1 to 9.0 magnitude. The Richter scale is determined from the logarithm of the amplitude of waves recorded by seismographs.
There are three mountains: the Sierra Madre Occidental, the Sierra Madre Oriental, and Sierra Madre del Sur.
About 1.1 miles long Or 5,989 feet
C. I believe because when you graph -4 and -2 it should make probably a straight line
The ocean floor that is were the tsunami begian.