摘要
本文利用唐山地区的石油地震勘探资料,包括7条反射波剖面资料和3口深井的直达波地震测井资料,研究了1976年8月28日唐山大震前后震源区及其附近地区浅层地震波速度的变化。所得结果表明,这次大震前地壳浅层内可能存在着一个低速异常区。本文还对该异常的可靠性及其形成机理进行了讨论。
The velocity change of seismic waves in the shallow part of the source region before and after the great Tangshan earthquake on July 28, 1976 has been studied by using seismic prospecting data from oil industry, including seven profiles of seismic reflection and direct path wave data of seismic logging in three wells in the Tangshan region. The results show that vhere had probably existed a low-velocity anomalous region in the shallow pan of the crust before the occurrence of the main shock. The reliability of the anomalies and their origin are also discussed in this paper.
出处
《地震》
CSCD
北大核心
1989年第1期32-3,共1页
Earthquake
