Normal Mode Studies of Even and Odd Degree Elastic and Anelastic Structure of the Mantle and Core

9509836 RITZWOLLER这项研究是利用地球在低频(小于12兆赫)和长波(L小于21岁)的简正模式来研究地幔和地核。与以前的研究相比，数据量增加了一个数量级，最近的大型深部事件呈现了以前从未被清楚观察到的正常分析模式。在地幔方面，弹性约束对于估计当前地幔模型差异最大的过渡带和外下地幔的结构，以及提供更好的关于vs/Vp变化的信息将特别有用。对于内核，焦点将集中在对各向异性内核和深层外核敏感的模式上。***

9509836 RITZWOLLER This research is to use the normal modes of the earth at low frequency (less than 12 mHZ) and long-wavelength (l less than 21) to study the earth's mantle and core. Data quantity has been increased by an order of magnitude over previous studies, and recent large deep events present normal modes for analysis that have never before been clearly observed. Concerning the mantle, elastic constraints will be particularly useful for estimating structures in the transition zone and the outer lower mantle where current mantle models differ most appreciably and in providing better information about the variations of Vs/Vp. With respect to the core, focus will be on modes sensitive to the anisotropic inner core and the deep outer core. ***