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小波域反演确定区域地震震源机制

, PP. 191-201

Keywords: 小波域反演,区域地震,震源机制

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Abstract:

?研究中小强度地震的震源机制解在地震学研究中有着重要的意义,对于中小强度地震,通常根据区域范围内的记录,利用P波初动,或者频率域的面波谱,或者时间域的波形反演等方法确定震源机制解.本文将小波域反演方法应用于确定区域地震震源机制,利用不同尺度的小波系数可以提供更多的约束信息.反演得到美国加州地区三个地震的震源机制,与哈佛大学矩心矩张量解(CMT)、美国地质调查局(USGS)等公布的结果相比,较为一致.该方法可用于利用区域范围内记录,确定中小地震震源机制,特别是快速求解大地震后的强余震震源机制.

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