1884年云南宁洱63/4地震补充考证与发震构造讨论  

Supplement Textual Research on Historical Data of the 1884 Ninger Earthquake in Yunnan Province and Discussion on its Seismogenic Structure

作　　者：谢虹[1,2,3] 雷中生[1] 袁道阳[1,3] 苏琦[1] 

机构地区：[1]中国地震局兰州地震研究所,甘肃兰州730000 [2]中国地震局地震预测研究所兰州科技创新基地,甘肃兰州730000 [3]兰州地球物理国家野外科学观测研究站,甘肃兰州730000

出　　处：《地震工程学报》2014年第3期663-673,共11页China Earthquake Engineering Journal

基　　金：公益性行业科研专项(201108001);国家自然科学基金项目(41302174)

摘　　要：对1884年11月14日云南宁洱地震参数进行了重新核定。这次地震的震中位置位于普洱府(今宁洱)周围,即23.1°N、101.0°E,精度为1类,误差≤10 km,震级6级,震中烈度Ⅷ度。等震线破坏区呈NE走向,而有感区长轴呈NE向,二者之间有一定差异。1884年宁洱地震区位于滇西南地区的龙陵—澜沧江断裂与红河断裂之间思茅次级地块内的普洱断裂带附近,其极震区长轴方向与断裂走向一致,应为本次地震的发震构造。Based on the historical earthquake reports of the Ninger earthquake in the Yunnan province on November 14, 1884, and a site inspection, new information has been obtained about this historical earthquake, providing credible evidence for the improvement of the isoseismal line. This paper thus reevaluates the Ninger earthquake parameters. The historical earthquake material is primarily from Guangxu Memoir and the memorial to the throne of the Palace, as well as the historical material of local chronicles. The results show that the epicenter was located near Puer mansion （presently Ninger）, which is 23. 1°N, 101. 0°E. The accuracy is class 1, with an average er-ror less than or equal to 10 km;the earthquake magnitude was 6. 75;the epicentral intensity wasⅧ. The most damaged area in this earthquake was Puer mansion. The damage scope was limited, and the epicenter zone can be delineated within 30 km from Puer mansion. The aftershocks were frequent and lasted for almost one month. It was a typical mainshock-aftershock earthquake. The early frequent seismic activity and continued aftershocks, as well as the relief activity of the local government and the Qing court, reveal that the magnitude of this earthquake was high and the damage was severe. The isoseismal line damage area of this earthquake pointed northwest, and the long axis of the earthquake-sensitive area pointed northeast. There is a marked difference between those two areas. Yunnan is located on the east edge of the continental border of the Indian and Eurasian plates. There are two force components acting on the Yunnan region. One is the strong lateral pressing of the Indian plate, and the other is the SSE squeezing force related to the plate activity. The east fault activity of the Yunnan region is closely related to the squeezing force. Anal-ysis of seismogenic structures shows that the Puer fault is a seismogenic structure of this Ninger earthquake. The geometric position of the Ninger earthquake in year 1884 overlaps with the posi-tion of the Puer

关 键 词：滇西南 历史地震考证 1884 年宁洱地震 发震构造 

分 类 号：P316[天文地球—地震学]