基于区域地震活动频次对比的余震删除方法  

A method of deleting the aftershocks based on the contrast on the regional seismic activity frequencies

作　　者：盛菊琴[1] 马禾青[1] 任学梅[1] 赵卫明[1] 

机构地区：[1]宁夏回族自治区地震局,宁夏银川750001

出　　处：《地震》2007年第1期85-94,共10页Earthquake

摘　　要：从尽可能科学地删除余震,又保留有价值的地震预测信息的目的出发,提出了一种既考虑地震序列特征,又基于主震后孕震区内的余震活动频次与区域地震活动正常时段频次相比的删除余震方法(简称SMRZ方法),编制了相应的计算程序。以西北地区发生的几次较大地震为例,对该文提出的SMRZ方法、广泛使用的K-K方法以及G-C方法的删除余震效果进行了对比研究。结果表明,与其他方法相比,笔者提出的方法识别余震时、空分布范围比较合理,同时保留了对未来地震有重要预测意义的前震,有较好的实际应用效果。For the aim of deleting the aftershocks as scientific as possible and preserving the valuable information for earthquake prediction, a method of deleting the aftershocks, called SMRZ method in short, which not only considers the earthquake sequence features, but is based on the contrast between the aftershock activity frequencies in the seismogenic zones after main shocks and the regional seismic activity frequency during normal period also. And the corresponding computation program has been compiled. Taking several relatively large earthquakes occurred in Northwest region as the examples; the contrast study has been done on the effects of deleting aftershocks through comparison between the SMRZ method proposed in this paper, the K-K method widely in use at present and the G- C method. The results show that, comparing with other methods, the method proposed by authors is relatively rational in recognizing the temporal and spatial distribution ranges of aftershocks. At the same time, the foreshocks have been preserved which have important prediction meaning to future earthquakes. Its practical use effects are better.

关 键 词：地震活动 地震频次 余震删除方法 西北地区 

分 类 号：P315.3[天文地球—地震学]