| Session Details | |
| Section | SE - Solid Earth Sciences |
| Session Title | Mechanical Environments and Dynamic Modeling of the 2011 Tohoku-Oki Ms 9.0 Earthquake |
| Main Convener | Prof. Dongping Wei (College of Earth Science, University of Chinese Academy of Sciences, China) |
| Co-convener(s) | Prof. Yongen Cai (Peking University, China) Dr. Keliang Zhang (State Key Laboratory of Earthquake Dynamics of China,Institute of Geology, China Earthquake Administration, China) |
| Session Description | The megathrust rupture area and slip distribution of the 2011 Tohoku-Oki earthquake have been widely reported by using kinematics inversion methods based on the seismic dislocation theory. However, studies on the reason to cause this event are very limited in dynamics. It is notable that significant discrepancies exist model to model even though each can obtain a slip distribution best-fitting the observations. This event provides almost all types of geophysical observations, especially new data from in situ stress, gravity, porous flow pressure and heat flow that respond instantaneously. These independent observations and new data will give comprehensive insights into the varying processes of the mechanical environments, and provide further constraints for dynamic modeling of the event. For further probing the event in dynamics, this session focuses on the following two issues. 1) Mechanical environment, which includes in situ stress measurement, focal mechanism, theoretical and numerical analysis as well as inversion of stress state, gravity, friction, permeability in the megathrust before and after the event, and the changes of porous flow pressure and heat flow. 2) Dynamic modeling, which can includes possible mechanical models related pre-, co- and post-seismic ones, from which the mechanical environment is probed. |