The spatial and temporal distribution of focal depth before strong shocks in Yunnan;

A PTD method a new method for determinating focal depth and its application;

We used the catalog of Earthquake Administration of Xinjiang and HYPODD to analyze the characteristics of focal depth and its tectonic significance in Urumqi region,Xinjiang.

It is found that the earth resistivity showed obvious middle-and short-term anomalies before two deep earthquakes(MS≥7.

A method for numerical simulation of acoustic wave equation is used to simulate and analyze the characteristics of weathering propagation in seismic field for different source depthes.

In this paper,based on a simple seismic model,a simple quantitative method to determine the boundary of potential seismic source is given according to two parameters of fault dips and source depth,and with concrete explanation of how to use the method.

7, occurred in the circum-Pacific earthquake zone in June 1993, using PDE data and source depths of earthquakes from GDSN broadband data, this paper discusses the meanings of the source depth of earthquake preliminarily.

In the seismogram records of deep-focus earthquakes occurred in areas such as margin of Japan Sea and the junction areas of China-Korea-Russia in direction NE of Changsha Seismic Station,sP phase of deep-focus earthquake can be found.

The results of high temperature and high pressure experimental research indicate that the occurrence of deep-focus earthquakes is closely related to the mantle phase transformation.