b值空间扫描图象场源关系初探
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摘要
讨论了云南地区６．７级以上强震第Ⅲ、Ⅳ活跃期和平静期间地震前一年的ｂ值空间扫描图象，发现在强震频繁发生的云南地区，当某一个异常区发生强震时，与此同时出现的其他异常区在若干年后仍可能发生强震，这些相对于已发生的强震为中短期场兆的异常可能为未来强震的中长期源兆。对低ｂ值异常而言，ｂ值较低的异常区发生强震较早；对高ｂ值异常则动态变化的异常区发生强震较早，异常幅度和异常区大小相对稳定的异常区发生强震较晚。这些现象在增加前兆复杂性的同时，也提供了强震危险区的中长期信息。结合计算机模型和实验研究的结果对震例中的场源关系作了解释。
The spatial scanning pattern of b value one year previous to strong earthquakes with M≥ 6.7 the occurred in the third and fourth active period and quiet period after activity in Yunnan area was discussed in this paper. It is discovered that in Yunnan area where the strong earthquakes occurs frequently, when earthquake occurs in one anomalous area, after some years the coming earthquakes will occur in other anomalous areas that appeared at the same time. This field precursors of occurred earthquakes can be used as the source precursors of coming earthquakes. For low b value, strong earthquakes will occur earlier in this area where b value is lower; for high b value, strong earthquakes will occur earlier in this area where anomaly was dynamic varication clearly, while strong earthquakes will occur later in the areas where anomalous amplitude and area are stable relatively. This phenomenon would increase complexity of precursors and provide middle - long term information of coming seismic locality. Finally, the relations between field and source in seismic examples is explained by the result about computer model and experimental studies.
The spatial scanning pattern of b value one year previous to strong earthquakes with M≥ 6.7 the occurred in the third and fourth active period and quiet period after activity in Yunnan area was discussed in this paper. It is discovered that in Yunnan area where the strong earthquakes occurs frequently, when earthquake occurs in one anomalous area, after some years the coming earthquakes will occur in other anomalous areas that appeared at the same time. This field precursors of occurred earthquakes can be used as the source precursors of coming earthquakes. For low b value, strong earthquakes will occur earlier in this area where b value is lower; for high b value, strong earthquakes will occur earlier in this area where anomaly was dynamic varication clearly, while strong earthquakes will occur later in the areas where anomalous amplitude and area are stable relatively. This phenomenon would increase complexity of precursors and provide middle - long term information of coming seismic locality. Finally, the relations between field and source in seismic examples is explained by the result about computer model and experimental studies.
引文
1梅世蓉,冯德益,张国民,等.中国地震预报概论.北京:地震出版社,1993.65～69
2陆远忠,陈章立,王碧泉,等.地震预报的地震学方法.北京:地震出版社,1985.93-103
3陈兴凯,蔡静观.滇西北强震前的高b值动态演化过程和孕震模式.待刊,1999.
4张国民,耿鲁明,石耀霖.中国大陆强震轮回活动的计算机模型研究.中国地震, 1993, 9(1): 20-32
5张国民,耿鲁明,张永仙,等.构造块体的成组孕震模型和前兆场某些特征的分析、地震学报, 1995, 17(1): 1-10
6耿鲁明,张国民,石耀霖.地震孕育发生的场源关系初步研究.中国地震,1993,9(4):310-319
7蔡静观,张喜玲,李永莉,等云南地区近期强震孕育过程中波速比突变的时空演化特征.地震学报,1997,19 (5):535-541
8蔡静观,张喜玲,李永莉,等.云南近期强震重复发生时地震学的动态演化特征.地震研究, 1997, 20(4): 357～364
9蔡静观,王兴辉,雷素华,等云南孟连西、武定、丽江三次强震前地震波振幅比的时空演化过程,地震研究, 1998, 21(1): 130-20
10许昭永,杨润海,赵晋明,等.施力体、受力体的相互作用和远场前兆.待刊, 1999
2陆远忠,陈章立,王碧泉,等.地震预报的地震学方法.北京:地震出版社,1985.93-103
3陈兴凯,蔡静观.滇西北强震前的高b值动态演化过程和孕震模式.待刊,1999.
4张国民,耿鲁明,石耀霖.中国大陆强震轮回活动的计算机模型研究.中国地震, 1993, 9(1): 20-32
5张国民,耿鲁明,张永仙,等.构造块体的成组孕震模型和前兆场某些特征的分析、地震学报, 1995, 17(1): 1-10
6耿鲁明,张国民,石耀霖.地震孕育发生的场源关系初步研究.中国地震,1993,9(4):310-319
7蔡静观,张喜玲,李永莉,等云南地区近期强震孕育过程中波速比突变的时空演化特征.地震学报,1997,19 (5):535-541
8蔡静观,张喜玲,李永莉,等.云南近期强震重复发生时地震学的动态演化特征.地震研究, 1997, 20(4): 357～364
9蔡静观,王兴辉,雷素华,等云南孟连西、武定、丽江三次强震前地震波振幅比的时空演化过程,地震研究, 1998, 21(1): 130-20
10许昭永,杨润海,赵晋明,等.施力体、受力体的相互作用和远场前兆.待刊, 1999
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