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Fig. 8 | Applied Network Science

Fig. 8

From: Spatiotemporal evolution of COVID-19 infection and detection within night light networks: comparative analysis of USA and China

Fig. 8

USA COVID-19 confirmed case network scales similarly regardless of low luminance threshold. High threshold (thin green) results in fewer, larger components than low threshold (thin orange). Intermediate threshold (thick blue) shows the emergence of the largest component (Northeast Corridor) but similar scaling to high threshold for other components in the upper tail. All thresholds show rank-size linearity suggesting scale-free behavior spanning 4+ orders of magnitude. Upper tail (gray box; enlarged at right) shows percolation-like behavior at low threshold, with the ~ 30 largest components disproportionately larger than the remainder of the distribution

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