Locust plagues showed clear distribution patterns on a spatial scale during this period, with the mean center located in Henan Province. Over this period, the frequency of individual plagues varied greatly and 1857 was the peak year. The results suggested that: (1) the locust plagues followed an approximately 5-year duration from 1855 to 1859. The objective was to reconstruct the temporal dynamics and spatial patterns of a major locust plague event to explore the social impact and reveal the underlying climate trends. Using records extracted from historical documents and focusing on locust plague events, this study investigated disasters that occurred from 1855 to 1859. Historical disaster studies tend to be addressed from various perspectives, and case studies (i.e., event reconstruction) are an important aspect of such research.
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