北京地区地震波速比异常变化与首都圈中等地震的关系研究  

Study on the relationship between abnormal charge of wave velocity ratio in Beijing area and medium earthquakes in Capital zone

作　　者：岳晓媛[1] 王林瑛[2] 武安绪[1] 

机构地区：[1]北京市地震局,中国北京100080 [2]中国地震局地球物理研究所,中国北京100081

出　　处：《地震地磁观测与研究》2008年第3期10-13,共4页Seismological and Geomagnetic Observation and Research

基　　金：地震科学联合基金项目(A07058);国家科技攻关项目(2006BAC01B02-01-04;2006BAC01B03-04-04)

摘　　要：利用首都圈数字地震台网记录到的P波和S波到时资料,选取北京地区有5个以上记录台站共76个地震事件,计算北京地区地震波速比的平均值及其随时间的变化,发现首都圈地区中等地震前北京地区地震波速比出现了较明显的低值异常。因此,依据北京地区地震的波速比变化特征,可以为首都圈地区发生的中等地震提供一定程度的跟踪预测意见。Based on the data of 76 earthquakes events which are recorded by 5 or above 5 stations in Beijing and selected from data of the P and S wave travel times in the Capital Digital Seismic Network,we computed the average velocity ratio and its variation with time in Beijing,and found that there is an obvious change in Beijing before medium earthquakes in Capital zone, therefore, based on the abnormal change of wave velocity ratio in Beijing, it may provide certain degree forecast opinion for the medium earthquake of the Capital zone.

关 键 词：北京地区 波速比 首都圈 中等地震 

分 类 号：P315.72[天文地球—地震学]