Earth Trivia : As for the scale of earthquake, when Magnitude(M) 5 is assumed to be 1, M7 is 1,000 and M9 is ?.
1,000,000
Magnitude(Richter scale) is a measure of the amount of energy released by an earthquake.
In terms of energy, an earthquake of magnitude 7 releases about 1,000 times more energy than an earthquake of magnitude 5 and M9 does 1,000,000 times more energy than M5.
