【摘要】 瀑布沟水电站处于相对稳定的瓦山断块上,水库的库尾位于龙门山断裂带、鲜水河断裂带、安宁河断裂带的交汇部位,地震活动相对强烈。了解和掌握水库蓄水前库坝区及其周围天然地震活动背景水平,可对水库诱发地震的危险性进行前期评价,为蓄水后的诱发地震活动监测预测提供可靠的鉴别依据。在水库蓄水前瀑布沟水库地震台网一期运行逾3年,二期运行逾1年,本文用这批资料提供库区及附近蓄水前天然地震活动水平确切实用的各项指标。用全国和四川台网地震资料,给出含库区的较大区域地震活动背景和对库区的影响,同时给出库区及附近ML≥2.5地震的活动特征。更多还原

【Abstract】 The Pubugou Dam of hydroelectric power station is located in the stable block of Washan and is near the convergence area formed by Longmenshan,Xianshuihe and Anninghe Faults.The seismic intensity of this region is high.In order to learn the seismic background of this region before and after the impoundment of this dam,we assess the primary risk of induced earthquakes and recognize the seismic genre caused by the natural and induced by the impoundment of this dam.The operation of monitoring network of this dam has run for three years and provides us with satisfactory observation data.The characters of this regional seismicity are summarized.更多还原