Question

An earthquake has a magnitude 7 on the Richter Scale. How many times greater are ground disturbances for this earthquake than for an earthquake with a magnitude 4 on the Richter Scale?

Can you help me calculate this?

Answer 1

Each jump from whole number to whole number represents a factor of 10

so say from 4 to 5 is times ten in magnitude
from 4 to 6 is times 100 (10*10 = 100)
etc etc

Answer 2

1000 times greater?

Answer 3

yes the jump from 4 to 7 is 1000 times in magnitude

a 7.0 is 1000 times stronger than a 4.0