| 澜沧、耿马地震前的定点形变异常特征 |
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| 引用本文： | 何翔,刘以齐. 澜沧、耿马地震前的定点形变异常特征[J]. 地震工程学报, 1991, 13(4): 35-40 |
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| 作者姓名： | 何翔 刘以齐 |
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| 作者单位： | 云南省地震局(何翔)，云南省地震局(刘以齐) |
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| 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。
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| 关 键 词： | 地震 前兆 形变 异常 澜沧 耿马 |
| 收稿时间： | 1990-12-10 |
FIXED-POINT DEFORMATION ANOMALY AND ITS CHARACTERISTICS BEFORE THE LANCANG-GENGMA EARTHQUAKE |
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| He Xiang and Liu Yiqi. FIXED-POINT DEFORMATION ANOMALY AND ITS CHARACTERISTICS BEFORE THE LANCANG-GENGMA EARTHQUAKE[J]. China Earthguake Engineering Journal, 1991, 13(4): 35-40 |
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| Authors: | He Xiang and Liu Yiqi |
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| Affiliation: | Seismological Bureau of Yunnan Province, Kunming, China and Seismological Bureau of Yunnan Province, Kunming, China |
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| Abstract: | 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. |
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