On the basis of the digital seismic wave data from 2002 to 2006 recorded by the station network in Zhejiang province,with time-frequency analysis method,the time-frequency characteristics of wave spectrum of induced earthquakes in Shanxi reservoir and tectonic earthquakes in Zhejiang have been investigated.

The fracturing of discontinuous jointed faults is a mechanism of tectonic earthquake.

The friction sliding of intersected faults is the third mechanism of tectonic earthquake.

Study of seismotectonics and seismicity for Yueyang City and its adjacent area;

This paper reviews briefly the progresses made during the last four years (1999～2002) in study of seismotectonics in China, especially appraises the achievements in the fields of the crustal and upper mantle′s structure, the active faults and tectonic setting of large earthquakes, the crustal deformation, and the numerical simulation.

The comparison of seismotectonics and seismicities between the Xialiaohe-Laizhouwan segment and the Weifang-Jiashan segment of the Tanlu fault zone has been made.

no effectively displaying the 3D geometry of the seismic structure in complex hypocenter area,gridding interpolation and 2-D wavelet transformation are used for processing hypocenter location data,and spatial hypocenter distribution image and seism starting time image are obtained.

Based on 1:1000000 Liaoning Seismotectonic Map, there are 29 faults that are active since Quaterary period in Liaoning Province.

We built a seismotectonic model for the west part of this zone from data of geological profiles, deep crust seismic detection and earthquake focal mechanisms in this paper.

It was considered,on the basis of tectonic analysis,that the Wenchuan great earthquake was a structural earthquake.

these s-waves are seismic waves recorded about structural earthquake and descent earthquake.