Most earthquake questions in Math 12 will compare theintensity of different earthquakes
Ie: how many times one EQ is bigger than another
Ex: How many times as intense as the Messina, Italy EQ(7.5) was the Valparaiso, Chile EQ (8.6)?
Difference or Increasein Richter Scale
The Valparaiso EQ was 12.6 times
Greater than the Messina EQ