Anything below 3 is generally not felt. Maybe if you're in a high-rise or something.
The scale is a factor of 10 every time it goes up- logarithmic scale? Something like that. But a 3 is ten times stronger than a 2. I think. It's been a while since I looked it up.
__________________
Why cycling? Anything [sport] that had to do with a ball, I wasn't very good at.
-Lance Armstrong
|