2014年8月3日云南鲁甸M6.5地震破裂方向性研究
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摘要
2014年8月3日云南鲁甸发生了M6.5地震,造成了严重的人员伤亡与经济损失.基于近震波形CAP方法反演得到的震源机制解表明此次地震主要为走滑型地震,两个断层节面的走向分别为70°及160°左右.由于震源区构造复杂,分布着不同尺度及走向的断层,仅根据地震断层面解难以确认发生破裂的实际断层.利用主震和参考地震之间的P波到时差及CAP反演过程中得到的时移信息,测量得到了鲁甸地震质心位置与破裂起始位置的差异,确定了地震断层面解中走向为160°的节面为真实破裂面.本文得到的鲁甸地震破裂方向性可为进一步研究该震发震成因提供参考.
引文
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