澜沧-耿马大震前单台波速比突变异常的时空变化特征
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摘要
用整体的观点、综合的方法研究了1988年澜沧-耿马7.6、7.2级大震前8年中澜沧、腾冲、洱源3个地震台单台波速比(简称波速比)的动态变化过程,发现自1983年始,远在250km以外地区发生的中强震、强震可引起澜沧地区波速比突变,其突变幅度随大震的临近和距离的逼近而增大。对波速比突变数据的可靠性进行了多方面的论证,并对波速比突变异常在地震预报中的应用及其物理成因进行了探讨。
In this paper, the dynamic variation's process of wave velocity ratio occurred in single station at Lancang, Tancheng and Eryuan stations eight years before Lancang-Gengma large earthquake (Ms =7. 6, 7. 2), is studied by using the synthetic method as a whole. It is found that moderate and strong earthquakes took place since 1983 in the region that is 250km far away from the large earthquake, it may lead to abrupt anomalies (abruptness) of wave velocity ratio in Lancang region, the abruptness amplitude is increased with approaching of time and distance of a large event.The reliance of abruptness data for wave velocity ratio has been demonstrated in many ways. The application of abruptness of wave velocity ratio to earthquake prediction and it's physical explanation have been discussed.
引文
蔡静观、许昭永、赵洪声,1993,云南地区强震前孕震系统的非线性阶段,地震研究,Vol.16,No.4,329—337.冯德益,1988,地震波理论与应用,地震出版社,北京.梅世蓉、冯德益、张国民、朱岳清、高旭、张肇诚,1993,中国地震预报概论,地震出版社,北京.张文冕、田少柏、吴建华、王薇,1994,中国九大地震临震突发性异常总体特征的统计分析,中国地震,Vol.10,No.1,93—96.周硕愚、董慧风、宋永厚、韩键,1986,用信息论方法研究大震前的突变异常,地震学报,Vol.8,增刊,121—133.周硕愚,1988,系统科学导引,地震出版社,北京.朱元清、石耀霖,1991,地震活动性研究中的非线性动力学模型,地球物理学报,Vol.34,No.1,20—31.

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