月震重定位

Moonquake Relocation

由于前人的月震定位结果主要是基于20世纪70、80年代的月球速度模型,定位结果误差较大,无法为月震层析成像等研究提供精确的月震参数.随着对月球内部结构研究的不断深入,月球速度模型及分层结构的精细程度已经有了很大提高.通过对Apollo月震数据解码及分析,重新拾取了月震初至数据,在总结前人震源定位的基础上,利用月球新近速度模型,采用Geiger震源定位方法进行了月震震源定位,给出了较为全面的月震参数目录,并对月震和地震的分布及形成机制进行了对比,可为以后月震及月球内部结构的深入研究提供更多的依据.

Existing parameters for tomography and relevant research about the moonquakes are not necessarily accurate due to he low precision of moonquake location resulted from outdated velocity models published during last century. However, the accuracy of lunar velocity model and stratigraphic structure has been improved greatly thanks to latest studies on lunar internal structure. This paper selects new arrival times from Apollo moonquake data, and relocates the moonquakes using Geiger method based on the latest lunar velocity model. In addition, the differences of distribution and mechanism between moonquakes and earthquakes are analyzed. This study can offer more information for further research of moonquakes and lunar internal stmcture.