Consistent CMT solutions before the 2010 Maule, Chile earthquake

In this paper, we define the angle between P, B, and T axes of focal mechanisms and three stress axes of tectonic stress field as the consistent parameter, to research the dynamic changes of stress field in earthquake preparation area before great earthquake. We mainly studied the change of the consistent parameter before the 2010 Maule, Chile earthquake using the CMT solutions. The result shows that the consistent parameter decrease before the earthquake, and the area of the lower consistent parameter in coincided with the distribution of aftershocks. It should be a phenomenon of predictive significance. When the accumulated earthquake examples are sufficient, uniform judgment criteria and prediction principles can be stipulated.