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康熙七年六月十七日戌时(1668年7月25日晚),山东南部发生了一次旷古未有的特大地震,震级为8.5级。震中位置位于今山东省郯城、临沐、临沂交界处,极震区烈度达Ⅻ度。由于极震区大部分位于郑城县境内,故称为郑城地震。这次地震波及到中国东部绝大部分地区以及东部海域,强烈有感的V度区北起辽宁南部,西至山西太原、湖北襄樊,南至江西吉安,东至隔海遥望的朝鲜半岛,连日本等
On June 17, seven years of Kangxi, Xu Shushi (evening of July 25, 1668), a tremendous earthquake unprecedented in magnitude occurred in southern Shandong at magnitude 8.5. The epicenter is located in Tancheng, Linmu and Linyi at the junction of Shandong Province and Shandong Province. Because most of the earthquake zone is located in Zhengcheng County, it is called Zhengcheng Earthquake. The earthquake spread to most parts of eastern China and the eastern waters. The highly-felt V-zone starts from the south of Liaoning Province to the north, Taiyuan of Shanxi Province, Xiangfan of Hubei Province, Ji’an of Hubei Province to the south of Ji’an City of Jiangxi Province, Japan and so on