【摘要】 本文研究了强震前的地震活动前兆。为定量描述这组前兆,我们研究了一组自相似地震活动函数。在此基础上进行了自相似地震活动特征的提取。然后利用直方图法对每一特征作了特征选择,如此共选取了21个特征。这些特征反映了强震活动水平增高,地震活化,地震活动偏离正常值及b值异常等地震活动前兆现象。更多还原

【Abstract】 The seismic precursors before strong earthquake have been studied in this paper. In order to describe them quantitatively, a set of self-similar seismicity functions has been studied. Based on it self-similar seismicity traits have been extracted. Then trait selection has been for every trait using the histogram method and 21 traits in all have been selected. The traits demonstrate the following seismicity precursors: increasing of seismicity level prior to strong earthquake, earthquake activating and earthquake activity deviating from normal value and b-value anomaly, etc.更多还原