松嫩盆地井下摆记录到的地方震地表反射波  

The surface reflection wave of local earthquake record by underground seismographs in the Songnen basin

作　　者：韦庆海 孟宪森 杨家亮[2] 高东辉 郝永梅 刁桂苓[2] 孟令蕾 佟艳英 

机构地区：[1]黑龙江省地震局,哈尔滨市鸿翔路24号150090 [2]河北省地震局,石家庄050021 [3]哈尔滨市地震局,哈尔滨150000 [4]黑龙江省地震局大庆地震台,黑龙江大庆163000

出　　处：《中国地震》2015年第2期432-438,共7页Earthquake Research in China

基　　金：中国地震局地震科技星火项目(XH12014);河北省科学技术研究与发展计划项目(11276905D)共同资助

摘　　要：地震波在地球表面的反射波PP、SS由于需经地球表面的一次反射,因此属于远震记录观测到的震相。本文利用井下摆观测数据,对2003年吉林松原震群和2005年黑龙江林甸地震震相进行认真研究,根据台站附近的测井资料确定的上地壳速度模型,对选定的地表反射点进行地震波的走时计算,初步判定在特定的震中距内井下摆可以记录到地方震的地球表面反射波。为和远震记录的PP和SS震相相区别,本文暂定此震相为PgPg,SgSg。Seismic waves of PP and SS as earth＇s surface reflection wave,as a result of the reflection of the earth ＇s surface,a seismic phase that can be observed in distant earthquake records. The paper used the underground seismographic data to study seismic phases of the 2003 Songyuan earthquake clusters and 2005 Lindian earthquake records,and calculated the arrived time at the selected surface conducting seismic reflection point with the earth ＇s crust velocity model at the stations near the logging data. The results show that the underground seismographs in specific epicenter of the local earthquake can record reflection waves on the earth surface. The paper determined the seismic phase as Pg Pg and Sg Sg in order to differentiate them from the distance records of PP and SS.

关 键 词：松原震群 地表反射波 井下摆 

分 类 号：P315[天文地球—地震学]