【摘要】 2013-06~07在广西平果铝3号排泥库附近发生小震群活动,震中空间分布集中,震源深度较浅。地震波形特征表明,有流体参与地震过程,较大地震震源机制的主压应力方向与区域构造应力场方向不一致。基于传染型余震序列模型(ETAS模型)的定量检测显示,此次震群流体触发强度较高,排泥库泥浆泄露对地震活动触发有直接影响。更多还原

【Abstract】 The small earthquake swarm occurred nearby the 3# tailing pond of Pingguo aluminum mine in Guangxi during June to July 2013. The spatial distribution of epicenters is concentrated,and the focal depth is very shallow. Seismic waveform show that the fluid takes part in the process. The direction of principal compressive stress of larger earthquakes is not consistent with the regional tectonic. The fluid had higher triggerring strength according to the quantitative detection,based on Epidemic Type Aftershock Sequence model( ETAS model). The leakage of tailing pond payed a direct role in the earthquake swarm.更多还原