Mapping of Lower Mantle Velocity Heterogenieties Beneath the Northern USSR

本研究分析现有的数字地震数据集 为了进一步证明低层有强烈的P速度异常， 在北方苏联的地幔下，如果可能的话， 绘制其空间范围。 尽管相当多的SH数据显示， 地核上方350公里处存在异常结构的证据 地幔边界，到目前为止，只有欧洲WWSSN数据和 GRF阵列已成功地搜索到P波 由这种反常现象产生的类似物。 结果应该给出 关于什么样的结构引起了 异常观测反过来又会限制动力学 地幔和地核的模型

This research is to analyze existing digital seismic data sets for further evidence of a strong P-velocity anomaly in the lower mantle beneath the northern Soviet Union and, if possible, to map its spatial extent. Although considerable SH data show evidence of anomalous structure up to 350 km above the core- mantle boundary, to this date only European WWSSN data and the GRF array have been searched successfully to find the P-wave analog produced by such an anomaly. The results should give information on what kind of structure is giving rise to the anomalous observations which can, in turn, constrain dynamical models of the mantle and core.