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利用云南数字地震台网和腾冲火山台网记录的2011年1~12月震相数据,采用Hypo2000、HypoDD定位方法对2011年盈江M S5.8地震序列的前震、余震进行了重新定位。定位结果显示地震分布较定位前更为集中。前震活动主要沿大盈江断裂呈NE走向分布。余震呈共轭分布:一支沿大盈江断裂呈NE向分布,另一支沿垂直于大盈江断裂的隐伏错断呈SSE向分布。余震分布存在着稀疏段落,可能对应着前震主要破裂区域。
Using the seismic phase data from January to December 2011 recorded by Yunnan Digital Seismic Network and Tengchong Volcanic Network, the pre-earthquake and aftershock of the 2011 Yingjiang M S5.8 earthquake sequence was relocated by using Hypo2000 and HypoDD method. Positioning results show that the distribution of earthquakes is more concentrated than before. Pre-seismic activity is mainly distributed along NE direction along the Dayingjiang fault. The aftershocks are conjugate: one is NE-trending along the Dayingjiang fault and the other is a SSE-trending disguise along a fault that is perpendicular to the Dayingjiang fault. There are sparse paragraphs in the aftershock distribution, which may correspond to the main rupture area of the foreshock.