针对太平洋板块俯冲动力作用对中国东北地震活动影响这一长期关注的问题，本申请将以2011年日本东北近海9.0级巨震后调整变化的难得观测资料，就其震后2个月中国东北发生深震响应活动及2013年10月日本东北近海7.2级地震后4-5天内中国东北连续发生深震和破坏性地震的关联性，通过对41130316重点基金项目布设NECsaids台阵的调整延续观测2年，充分利用固定地震台网和流动台阵多年累积的波形，通过S波、SKS波和Ps转换波来提取地壳和上地幔各向异性信息，利用波形反演得到的中小地震全矩张量解和应力场时空变化信息，来分离震源区不同来源的各向异性贡献，结合地震面波各向异性结果来获取研究区深部不同层位变形的可靠信息。以直接的观测资料和客观论据，结合多尺度成像反演的壳幔精细速度结构和矿物物理等结果，通过对流变结构及壳幔耦合关系的研究，厘清中国东北深震和浅源强震的相关性及太平洋板块俯冲作用问题。

To investigate the interaction between crustal earthquakes of Northeast China and Pacific subduction zone, this project will install a small-aperture dense seismic array consisting of 28 broadband stations in northeast Jilin province and southeast Heilongjiang province for at least two years. With the extremely valuable observational data caused by the dynamic effect of the Japan subduction zone in response to the tectonic stress adjustment after the 11 March 2011 Mw 9.0 Tohoku-oki earthquake, combined with all available data from portable seismic array and permanent network, we would have a better observational constraints on seismic anisotropy from the splitting of shear waves, the character of P-to-S conversions, and the surface wave. And we could obtain full moment tensors of small and moderate earthquakes from waveform inversion. Then we would derive the regional distribution of the stress field through a damped linear inversion using the focal mechanisms obtained in our study. All of these would help us to isolate anisotropy in different parts of crustal and mantle should result in tighter constraints on anisotropic geometry. Our observations of seismic anisotropy could provide relatively direct constraints on mantle dynamics because of the link between deformation and the resulting anisotropy, and improved our understanding of the crust-mantle coupling relationship and deep subduction processes beneath Northeast China. Then we are able to more definitively answer fundamental questions concerning the interaction between crustal earthquakes of Northeast China and Pacific subduction zone.