Figure 6
The figure contains two line plots and one heat map. Plot (a) shows correlation entropy values that fluctuate during the first week before stabilising above 2.05 by day 12. Plot (b) depicts running entropy, which increases steadily from around 0.6 to near 1.0, indicating improving system stability. The heat map (c) visualises the correlation between variables such as number of donation items, donors, donation values by material category, number of announcements, and a search index over time. The highest intensity appears in the early days, gradually decreasing after day 8, reflecting concentrated early coordination and activity during the emergency response period.Daily changes in correlation entropy (a), running entropy (b) and correlation coefficients (c) of HMDS after the earthquake
Source: Authors’ own work