[Petronski]

Isn't each 0.1 greater = 10 X the energy?

Not quite. The Richter magnitude is the power of 10. Thus, a 7 is 10 times stronger than a 6, 100 times stronger than a 5, etc.

I believe a .8 climb in Richter magnitude makes the quake 8 times stronger than earlier believed.

[Quix]

MUCH APPRECIATED.