Earthquake( <scale>, <duration>, <source>, <radius> )
Module: Level
Summary:
Create an earthquake at the given point
Example:
Earthquake( 0.3, 3, self.origin, 850 );
Required Args:
1 : <scale> The scale of the quake.
2 : <duration> Duration in seconds.
3 : <source> The earthquake origin.
4 : <radius> The earthquake radius of effect.