Abstract: According to the features of deep seismic sounding records and the velocity structures in the crust, the Q-value structures as well as other geophysical data in North China, This paper gives an illustration on the existance of low velocity layer; research has been made on the formation of the low velocity layer along with some geological phenomenon related to the low velocity layer such as tectonic movement, earthquake hypercenter distribution and geothermal anomaly.

Key words: North China, Low velocity layer, Earthquake, Structure, Geotherm

摘要： 本文根据华北地区人工地震测深的地震记录特征及得到的地壳速度结构和介质Q值结构,并结合其它地球物理资料,论述了华北地区壳内低速层的存在。通过分析对比,研究了与壳内低速层有关的一些现象,如构造运动、地震震源分布和地热异常等。在此基础上,对地壳内低速层的成因机制作了初步的探讨。

关键词: 华北, 低速层, 地震, 构造, 地热