报告人： Prof.Jiangheng He
2-D and 3-D Numerical Models for Multi-scale Earthquake Processes in Subduction Zone
The subduction zones are of particular interest because most of the world’s great eartheuqakes (magnitude 8 and greater) have occurred on subduction zone thrust faults. Great earthquakes can cause severe damage through strong ground motion shaking, and are also responsible for generating great tsunamis in coastal regions. To better understand multi-scale earthquake processes in the subduction zones, we have developed a number of numerical models for investigating crust deformation during earthquake circles, mantle wedge flow and thermal regime, and hydrothermal circulation in sediment-buried oceanic crust. Geophysical and geochemical observations, such as local heat flow, GPS data, and levelling surveys, provide primary constrains for the numerical models. In turn, the modeling results help constrain important physical parameters and produce new input for future observations. The modeling output also provides insight into the dynamic mechanics of the earthquake processes, and further results in significant improvement in earthquake and tsunami hazard assessment.
报告时间： 2006年8月10日(周四) 上午10:00--11:00