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. 2016 Aug 18;17(Suppl 4):543. doi: 10.1186/s12864-016-2792-1

Fig. 2.

Fig. 2

Illustration of ripple centrality. a Node Acl is the source of highly active paths, and has high closeness centrality. However it can only reach 4 nodes, and is not a good epicenter. b Node Aor can reach 14 nodes, but paths originating at Aor have low activity. Thus it is not a good epicenter. c Node Arc is the source of highly active paths and can reach a large number of nodes (7), making it the best candidate for an epicenter. The hexagon represents candidate epicenters