Figure 7

Inter- and intra-modular cascading events. Inter- and intra-modular cascading events for the topics under consideration (left: ‘grassroots’; right: ‘elections’). Binned representation of the relationship between the number of nodes in a cascade that unfolds in the same community of the initial seed ($n_{\mathrm{int}}$) and the size of the cascade itself ($n_c$). Proportions have been normalized column-wise, i.e. by the total number of cascades with same size. Note that cascades affecting up to 10³ nodes mostly lie close to the diagonal, i.e. a vast majority of the cascade occurs within the community where it began. At a certain point (beyond $n_c\approx {10}^3$) cascades spill over the module where they began.