1. This calculation is just for engineers:
![](http://upload.lushstories.com/297-ATT00028%20-%2020101130_154513.gif)
2. And this one is for laymen -- like you:
This is a trepidatory earthquake -- an up and down movement...
![](http://upload.lushstories.com/786-ATT00031%20-%2020101130_154513.gif)
This is an oscillatory earthquake -- a side to side movement..
![](http://upload.lushstories.com/551-ATT00034%20-%2020101130_154513.gif)
And this is a combination of both trepidatory and oscillatory:
![](http://upload.lushstories.com/339-ATT00037%20-%2020101130_154513.gif)
Isn't science beautiful when properly explained???!!!!
Now you can impress your friends...
Hey, you're welcome!