摘要
<正>三峡地区属于鄂西南地块,在秭归盆地的东面紧临着古老的刚性地块——黄陵背斜,在这些刚性地块的影响和限制之下,秭归盆地边缘受到强烈的挤压,且断裂构造发育断裂更为复杂(图1)。鄂西三峡地区的地震稀少,历史上鲜有过地震记载。自2003年6月三峡水库开始蓄水到2005年7月间,三峡地区记录到的1702个地震中,以极微震和微震为主,表明三峡及邻区地震事件大大增加,而且基本属于微小震群,显示该地区高频度、低强度的地震活动特点。由于常规人工定位方法不容易判
引文
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