关键词: 燕山地区, 转换波, 地壳构造, 地壳运动, 地震活动带, 孕震条件

Abstract: Based on the new data of crust structure revealed recent years by a method of P-SV converted waves from earthquakes and combined with the data of surface geological structure we have discussed the major features of crust structure and crust movement in Yanshan region, especially focused our attension on the analyses of structure characteristics, movement pattern of the crust in Huailai-Ninghe WNW seismic active zone and their differences between both sides of the zone.In the light of comparison between distribution of epicentres and crust structures we have found some diagnostic criteria of deep structure, similar for strong earthquake areas. The problems about deep process of strong earthquake preparation and potencial hypocentre zones have been discussed. All the results from this study are useful to the research on earthquake monitoring and prediction in the region of Capital Circle.

Key words: Yanshan region, Converted waves, Crust structure, Crust movement, Seismoactive zone, Conditions for earthquake preparation