![]() (3) Locust plagues impacted society and damaged agricultural yields, as indicated by higher rice prices and increased wars. The droughts were likely related to teleconnection between the increasing El Niño, frequency of sunspot activity and declining SSTs. The main reason for the locust plagues was probably drought events, climate and other geographic factors. Locust plagues tended to be localized at the beginning and then spread out from the original locations, presenting a general spatial pattern of “radiating after clustering.” (2) Locust plagues were closely related to drought and showed a correlation with the overall drainage pattern of major bodies of water in the regions studied. 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 Using records extracted from historical documents and focusing on locust plague events, this study investigated disasters that occurred from 1855 to 1859.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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