Now that you’ve forged your Foundation Friends, and are beginning to expand your authority by continuing to write excellent quality blog posts, while securing new friends and fans through the previously mentioned tactics, the concepts ‘Spheres of Influence’ and ‘Influence Ripples’ become tremendously important.

Source: http://darmano.typepad.com/logic_emotion/
Spheres of Influence & Influence Ripples … the Concept:
David Armano introduced the concept of Influence Ripples in 2006. His post Influence Ripples 2.0 shows how numerous bloggers with varied spheres of influence interact. Ultimately, networks become evident.
The concept is this, each person’s authority can be viewed as a circle (see above) on a 2-dimensional grid:



