摘要
对新疆北天山地区地下流体的动态观测资料进行分析 ,发现在 2 0 0 1年 11月 14日昆仑山口西 8.1级地震的震时和震后 ,多井水位、水温、流量出现大量异常变化 ,其特征主要表现为地震波的同震振动效应和震后阶跃变化。其中乌鲁木齐 10号井的地震波效应双振幅最大 ,为 185 mm,持续时间达 2个小时 ;0 4井水位阶跃上升幅度较大 ,为 0 .12 5 m,且具有不可逆特征。另外 ,对比了新疆及邻区 7级以上地震北天山地下水的震后效应 。
By analyzing the dynamic observation data of the groundwater in North Tianshan, Xinjiang, a large number of anomalous variations were found in water level, temperature, discharge at many well stations at and around the Nov. 14, 2001 M-S=8.1 earthquake in the west of Kunlun Mountain Pass. The anomaly feature showed the coseismic vibration effect and postseismic step jump variation of seismic wave. The maximum double amplitude of the seismic wave, 185 mm, with 2-hours duration, was observed at the Urumqi Well No.10; the bigger step jump amplitude of the water level, 0.125 mm, with irreversibility, was found at the Well No.04. In addition, a comparison study was given on the postseismic effect of the groundwater in North Tianshan between the Nov. 14, 2001 M-S=8.1 earthquake and the M-S≥7 earthquakes in Xinjiang and vicinity; some discussions were made about the relation of the long-distance effect of groundwater and well-earthquake distance, and about the amplitude of step jump anomaly.
出处
《内陆地震》
2002年第3期213-223,共11页
Inland Earthquake
