地下水诱发的浅层前兆异常及其机理与有关的地震预报问题(2)

THE MECHANISM OF SHALLOW LAYERS ANOMALY CAUSED BY GROUNDWATER AND ITS RELATED QUESTION IN EARTHQUAKE PREDICTION(2)

摘要: 分析了现有主要地震前兆模式(包括热物质上涌模式)在解释现实观测到的浅层异常时遇到的困难。论证了多种前兆异常与空间环境因子之间具有的密切成因联系。诱发前兆异常具有7个主要的特征,即种类的多样性、与降水及地下水变化关系的非线性、发生的周期性和季节性、变化的层次性、时间分布的成丛性、空间分布的大区域性以及多种手段异常变化的时空关联性等。

Abstract: the problems in explanation of shallow layer anomalies with current seisimic precursor model (including material effusive model)are analyzed.Precursory anomalies have close relation with environmental factors in cause of formation.Induced precursory anomalies have 7 main features, i.e.diversity of types, the nonlinearity correlating with the change of rain and groudwater, the periodicity and seasonal feature of occurrence, hierarchical feature of variation, tussocky feature in temporal distribution, broad area in spatial distribution and the relevance of different kind anomalies.