摘要
以 30口水动态及油井动态观测井 1 973年至 1 978年的观测资料为基础 ,对唐山7.8级地震前后水动态和油井动态异常的演化过程进行了分析研究 .认为该次地震前后水动态演化过程可分为 4个阶段 .异常首先在震中区附近出现 ,然后异常区向外围区扩展 ,并呈现多点集中的特点 .在中短期阶段异常明显向震中区收缩、迁移 .
On the basis of data of 30 observation wells for the dynamic of groundwater and oil from 1973 to 1978,evolving process of anomalies of groundwater and oil dynamic before and after the Tangshan 7.8 earthquake is analyzed and studied.The results show the evolving process can be divided into four stages. The anomalies arise first in near epicentral area and then anomalous areas spread outward,showing several concentration point of anomaly.In middle short stage,anomalous areas clearly contract and migrate from outer ring to epicentral area.In the imminent stage,an anomalous concentration area with high value is formed in the epicentral area.
出处
《西北地震学报》
CSCD
北大核心
2001年第1期26-29,共4页
Northwestern Seismological Journal
关键词
唐山地震
地下水位异常
油井动态
空间演化图像
震中区
Tangshan earthquake
Groundwater level anomaly
Dynamic of oil well
Anomalous character
Special evolution pattern
