川滇强震前地下流体短临前兆综合信息特征

Research on the comprehensive information Characteristics of Short-Imminent PrecursoryBefore the Strong Earthquakes in Sichuan and Yunnan

本文选取川滇相对均匀分布的地下流体观测台点的资料,提取其中的中高频信息,然后采用幂函数衰减的方式进行中高频信息场的空间曲面拟合,研究相同物理量的多测点的短临综合信息场。川滇地下流体短临综合信息空间扫描结果表明:在川滇强震发生前短期内孕震邻近区域的短临综合信息明显出现,且大幅度起伏变化;川滇地下流体短临综合信息时间扫描结果表明:川滇强震发生前3个月内中高频信息均表现出较大幅度的增强波动变化,从而突出了震前的多台异常综合信息。

In this paper, the some observations of ground water in Sichuan and Yunnan are selected from many observation means. The station distribution of observations of ground water is relatively uniform. Moderate-high frequency information had been obtained from these observation data. The field of the moderate-high frequency information is created with the method of power function attenuation. The short-imminent comprehensive precursory field is researched with the observation data that have same physics significance. It shows that the seesaw variety of the comprehensive precursory field is big range in the area near the focal zone where any earthquakes will occur. The teams of moderate-high frequency information are selected from the some observations. The change course of the short-imminent comprehensive precursory with time is researched also. It shows that the short-imminent comprehensive precursory of moderate-high frequency information increase clearly in three months before any earthquake. It gives prominence to the comprehensive precursory information of the observation.