Figure 5
The figure presents three panels showing entropy analysis and data correlation during a 28-day post-earthquake period. Panel (a) shows correlation entropy, which fluctuates within the first 10 days and then stabilises around 2.1, indicating structural coordination. Panel (b) shows running entropy, which steadily increases from about 0.6 to near 1.0, suggesting improved operational orderliness. Panel (c) shows a heat map comparing variables such as number of unique donation items, number of donors, and per capita donation values for life-sustaining materials, daily necessities, medical materials, and rescue equipment, along with official announcements and the search index. The strongest correlations appear during the first 8 days, representing the peak phase of emergency response activity.Daily changes in official announcements and comprehensive search index after the earthquake
Source: Authors’ own work