| 2014年5月云南盈江MS5.6、MS6.1地震发震构造分析 |
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| 关键词:Yingjiang earthquake seismogenic fault seismic intensity Sudian fault Tengchong block |
| 基金项目:中国地质调查局项目(编号: 1212011120163; 12120114002101); 国家自然科学基金项目(编号: 41171009)和中央级公益性科研院所基本科研业务费项目(编号: DZLXJK201410) |
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| Seismogenic Structure of 2014 MS5.6 and MS6.1 Earthquakes in Yingjiang, Yunnan Province |
| Two earthquakes of MS5.6 and MS6.1 occurred successively on May, 2014, in Yingjiang, Yunnan province. In order to determine their seismogenic structures and the regional active tectonic settings, the authors carried out field investigation of seismic intensity, remote sensing image interpretation, analysis of focal mechanism solutions and aftershock distribution. The results show that the macro-epicenters of two earthquakes were both located near the area of Malipo Village, Mengnong Township, Yingjiang County, but their seismogenic faults are different from each other. The former was associated with the NE-trending left-lateral strike-slip Xima-Panlongshan fault, whereas the latter occurred along the SN-trending right-lateral strike-slip Sudian fault. Historical seismicities were dominated by the earthquakes with magnitude 5~6 in the Yingjiang region, which clustered along the SN-trending fault. Under the combination effect of Sagaing fault and inner arc belt in western Yunnan, the north of Tengchong block bounded by Dayingjiang fault is mainly dominated by nearly SN-trending right-lateral strike slip faults, whereas the south is dominated by NE-trending left-lateral strike slip faults. The activity of nearly NS-tranding faults was relatively stronger in Late Quaternary. |
| HUANG Xiao-long,WU Zhong-hai,ZHAO Xiao-yan,WU Kun-gang,HUANG Xiao-jin,DU Jin-jin.2015.Seismogenic Structure of 2014 MS5.6 and MS6.1 Earthquakes in Yingjiang, Yunnan Province[J].Acta Geoscientica Sinica,36(6):761-770. |
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