"i feel the earth move under my feet . . ."

1 = 10
2 = 100
3 = 1,000
4 = 10,000
5 = 100,000

5.1 = 126,000
5.2 = 158,000
5.3 = 199,000
5.4 = 251,000
5.5 = 316,000
5.6 = 398,000
5.7 = 501,000
5.8 = 631,000
5.9 = 794,000
6.0 = 1,000,000

6.1 = 1,259,000
6.2 = 1,585,000
6.3 = 1,995,000
6.4 = 2,512,000
6.5 = 3,162,000
6.6 = 3,981,000
6.7 = 5,012,000
6.8 = 6,310,000
6.9 = 7,943,000
7.0 = 10,000,000

richter scale: exponential each # = 10 x the previous #