Seismic Wave Propagation in the Oceanic Crust and Upper Mantle

研究所将使用一种新的计算机代码来模拟地震波在海洋中脊的某些特征结构中的传播。各向异性和非均质介质的全波形模拟将是针对海洋下地幔结构的地震实验的规划和解释的重要工具。 PI将研究射线理论在被动OBS实验中的应用。地震观测量的预测将与使用伪谱方法的波形建模所获得的预测进行比较。研究将集中于三个结构特征：正常的洋壳和岩石圈、洋中脊和分段的缓慢扩张脊（结构波长变得小于信号波长）。

The PIs will use a new computer code to simulate seismic wave propagation in some characteristic structures of mid-ocean ridges. Full waveform modeling of anisotropic and heterogeneous media will be an essential tool in the planning and interpretation of seismic experiments targeted at mantle structure beneath the oceans. The PIs will investigate the use of ray theory in passive OBS experiments. Predictions of seismic observables will be compared to those obtained of waveform modeling using a pseudo-spectral method. The research will concentrate on three structural features: normal oceanic crust and lithosphere, a mid-ocean ridge and a segmented slow-spreading ridge (where structural wavelengths become smaller than the signal wavelengths).