应大陆碰撞与高原隆升重点实验室赵俊猛研究员的邀请，美国MIT大学Yingcai Zheng博士访问我所，并作学术报告。
报告题目：Imaging random heterogeneities in the Earth
报告人：Yingcai Zheng Ph.D
时 间：2011-8-9上午8:30-10:00
地 点：青藏所二楼会议室
Abstract：The Earth is heterogeneous at all length scales. Deterministic seismic tomography reveals mainly large-scale heterogeneities whose sizes are on the order of a few hundred to a few thousand km. I will talk about a statistical method that can provide interesting information on small to moderate scales (on the order of 10s km) that are comparable to scales of the recycled materials. The method is based on spatial correlation of log-amplitude and phase fluctuations observed using a seismic array. I will discuss the relation between this statistic approach to the deterministic tomography and the effect of small-scale heterogeneities on some global seismological observations.
