Characteristic of mid-strong seismic activity before M 6.2 Dayao earthquake and its significance for short-term and immediate earthquake predication;

One-Year Prediction for the Dayao and Minle-Shandan Earthquakes in 2003;

The Dayao Yi minority group has many branches.

Dayao structure is a large-scale anticline trap in the central part of Chuxiong Basin.

Successive deformation short-term precursor chara- cteristics before the Dayao earthquake;

In this paper the crustal velocity structure are imaged at the annual scale for determining the evolution of 3D velocity structure before the Dayao earthquakes in 2003, and the physical variety of medium are discussed about the cause of earthquake occurrence.