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利用数字化地震台网资料研究构造环境应力场,可以把原来仅限于使用地震震级mb≥3.8的地震资料扩大到MW=1.8,这样大大增加了对于目前地震活动性较弱地区地震资料的使用,加强了对于一些重点地区潜在危险性的研究。利用中国与欧共体合作在北京西北怀来建立的数字化台网资料,采用SEISAN地震分析软件,得到了北京地区42次地震的峰值加速度值,峰值速度值,峰值位移值,地震矩M0,矩震级MW。提出了适用于京西北地区的地震波衰减模式,在陈培善推导的计算公式基础上计算了京西北地区的环境应力值τ0。据此,结合北京地区历史地震的分布推测了这些地区的地震危险性。结果表明,近期发生大地震的可能性不大。
Using the digital seismic network data to study the tectonic environment stress field, the original seismic data limited to the earthquake magnitude of mb≥3.8 can be expanded to MW = 1.8, which greatly increases the seismic data for seismic regions with weak seismicity The use of, strengthening the study of the potential dangers in some key areas. Using the digital network data established by China and the EC in Huailai, northwest of Beijing, SEASAN seismic analysis software was used to obtain the peak acceleration, peak velocity, peak displacement, moment M0, moment M0 of the 42 earthquakes in Beijing Magnitude MW. A seismic attenuation model suitable for the northwest of Beijing is proposed. Based on the calculation formula deduced by Chen Peishan, the environmental stress τ0 of the northwest Beijing area is calculated. Based on this, the earthquake risk in these areas is speculated based on the distribution of historical earthquakes in Beijing. The results show that the recent earthquake is unlikely.