地震中短期前兆某些特征的研究

从前兆分段的物理基础出发,对强震和中强震的中短期异常（1年尺度）基本特征进行了归纳和总结。 认为地震活动性中短期异常以在震中附近出现中短期（约1年）平静为最主要特征,并出现中短期空区。对于多种学科中短期前兆异常的特征,从总体上看尚处于中期阶段的整体发展过程之中。由于不同震级强度的地震,其约1年的时间尺度对其孕震过程的内涵来说有较显著的差异,对7级以上大震和中强地震的中短期前兆异常特征分别进行了研究和总结。

Research on characteristics of mid-and short-term seismic precursors

On the basis of physical precursory segmentation,the mid-and short-term anomalies （one-year-long scale） of strong and moderately strong earthquakes are summed up in this paper.It is thought that the mid-and short-term anomaly of seismicity is characterized by showing mid-short-term quiescence （one year or so） beside the epicenter, as well as the mid-short-term gap.The developing process of mid-term stage as a whole characterizes the mid-and short-term precursory anomalies of multi-disciplines.Since different sized earthquakes show obvious difference to connotation of the seismogenic process in about one year or so,the mid-and short-term precursory characteristics of strong earthquakes （more than M S 7） and moderately strong earthquakes are studied and summarized respectively in this paper.