【摘要】 利用最大熵谱和带通滤波方法分析处理了北京白家疃井约6年的地热观测资料。结果表明,在频率域上有丰富的地热地震前兆信息;井—含水层系统的固有频率特性与地震活动存在一定关系。某些周期的振幅异常与200km范围内M_L≥4.0地震有较好的对应关系,特别是1989年10月18日大同M_s6.1地震前,用本方法处理地热观测资料,发现有明显的中期、短期和临震异常。 文中讨论了井—含水层系统产生响应频率特性的物质条件。更多还原

【Abstract】 In this paper, the maximum entropy spectrum and band-pass filtration method has been applied to the process and analysis of the observed geothermal data for about six years at the Baijiatuan well, Beijing. The result shows that ther is abundant information of seismo-geothermal precursors in the frequency domain. There is a certain relationship between the characteristics of natural frequency of the well-water bearing layer system and the earthquake activity. The amplitude of geothermal anomaly during some periods shows fairly good corresponding relation to the earthquakes with Ms≥4.0 within the range of 200 km. Especially, prior to the earthquake with Ms =6. 1 occurred on Oct. 18, 1989 at Datong, the medium and short-term as well as the imminent geothermal anomalies were revealed by using this method.In addition, the material condition is also discussed for the well-water bearing layer system to produce the frequency response characteristics.更多还原