摘要
本文分析了1988年11月6日云南澜沧、耿马地震前定点形变异常特征。趋势性异常主要表现为异常持续时间较短,变化迅速,倾斜方向一致。异常持续过程中出现1—2个加速变化阶段;短期异常出现在震前2—6个月,主要表现为倾斜矢量打结、方向改变及速度明显减小;形变异常的方向与震中方向有一定的联系。
This paper analyses the characteristics of fixed-point deformation anomaly before the Lancang-Gengma, Yunnan Province, earthquake on Nov. 6, 1988. The results show that the trend anomalies are characterized by short, anomalous duration time, change rapid, consistent tilt direction in space, 1—2 accelerated change stages during the anomalous duration process; the short-term anomalies appeared 2—6 months before the earthquake, with the tilt vector to knot, the direction change and the obvious velocity decrease; the direction of deformation anomaly has some contact with the epicentral direction.
出处
《西北地震学报》
CSCD
1991年第4期35-40,共6页
Northwestern Seismological Journal
