In this image, we are looking at the core of the blogosphere. The dark edges show the reciprocal links (where A has cited B and B has cited A), the lighter edges indicate a-reciprocal links. The larger, denser area of the graph is that part of the blogosphere generally characterised by socio-political discussion (the periphery contains some topical groupings). Above and to the left is that area of the blogosphere concerned with technical discussion and gadgetry.

From the work of Matthew Hurst of Microsoft’s Live Labs, co-creator of Blogpulse, from which the data for this image was derived.