- 责任者：Zeng Xiangfang (Key Laboratory of Computational Geodynamics ; University of Chinese Academy of Sciences ; CAS ; Beijing 100049 ; China) ; Han Libo
- 刊名：Earthquake
- 出版年：2013
- 卷期：33(4)
- 关键词：强震 ; strong earthquakes ; 震源参数 ; hypocenter parameters ; 云南 ; Yunnan Province ; 四川 ; Sichuan Province
- 页码：p.196-206
- 图表：6 illus., 1 table, 36 refs.
- 分类号：0500
- issnNo：ISSN1000-3274
- isbnNo：CN11-1893/P
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The Ninglang—Yanyuan MS5.7 earthquake that occurred on June 24,2012 caused certain death and property loss.To explore seismogenic tectonic of this earth-quake,we used regional broadband seismic records based on velocity model extracted from Crust Model 2.0 to invert focal mechanism with cut and pastemily: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（CAPmily: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">） method.The strikes,dips,rakes of best focal mechanism solutions are 189mily: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">°/59mily: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">°/-40mily: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">°and 302mily: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">°/55mily: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">°/-141mily: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">°,respectively.It is a Mw 5.4 normal dominant event with strike slip component.The centorid depth provided by CAP method is 4 km.Two other models were employed to better understand errors introduced by velocity model.The mechanisms and magnitudes are similar,while centroid depths range from 4 km to 6 km which are much shallower than results based on traveltime.sPL phase recorded by LGH and pP phases recorded by Australian seismic stations confirmed that the centorid depth is between 4mily: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">～8 km.North-West distribution of short term aftershocks mily: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（two days after mainshockmily: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">） suggests that this earthquake occurred at Yongning Fault.