For the moment magnitude scale, each increase on the scale represents 31.5 more energy released by the earthquake. Which is a good estimate of how much more motion is there for a magnitude 7 earthquake than a magnitude 4 earthquake?
A. 90 times
B. 27,000 times
C. 900 Times
D. 3000 times

The provided statement talks about an estimate of energy release by an Earthquake with a magnitude of 4 to a magnitude of 7. According to the statement, for the moment magnitude scale, 31.5 times more energy is released with increase of one magnitude scale. Therefore, if we take a rounded value of 31.5 as 30 and multiply it three times (30 X 30 X 30) to represent 3 scales (4 to 7) on moment magnitude scale, we will get 27,000 times more energy.

For the moment magnitude scale, each increase on the scale represents 31.5 more energy released by the earthquake. Which is a good estimate of how much more motion is there for a magnitude 7 earthquake than a magnitude 4 earthquake? A. 90 times B. 27,000 times C. 900 Times D. 3000 times

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For the moment magnitude scale, each increase on the scale represents 31.5 more energy released by the earthquake. Which is a good estimate of how much more motion is there for a magnitude 7 earthquake than a magnitude 4 earthquake?
A. 90 times
B. 27,000 times
C. 900 Times
D. 3000 times