中文摘要：

综合应用离散小波变换和连续小波变换进行了干扰源分离和场源深度确定的模拟实验,发现通过小波变换可有效地确定场源深度。根据实测重力异常数据研究了琉球俯冲带的深部特征,推测其在东经122.5°线上地下105 km左右发生弯曲变为水平延伸。

英文摘要：

We apply discrete wavelet transform and continuous wavelet transform to do some simulation experiments of separating causative body and determining the depth of field source,and find that wavelet transform is effective to identify depth of source.What＇s more,we have researched depth character of the Ryukyu subduction zone based on real gravity anomaly data,and presume that the subduction zone curves to horizontal at about 105km underground at 122.5 degrees east longitude line.