摘要
通过对2000年以来云南地区MS≥6.0强震震中区(大姚、永胜、宁洱)水位观测资料的分析,发现震中区水位在强震发生前具有一种共同变化特征,即强震大多发生在水位上升至最高水位后的反向下降过程中。震中区水位的这一异常共性,有助于今后对云南强震的地点判定。而强震震中区这种震前高水位的形成,借助统计分析确定为降水所致。水位上升使地壳构造应力得以积累,水位下降使积累的应力骤然释放,导致强震发生,该项研究也为地球表层水运动的致震机制提供了一种解释。
In this paper,the authors analyzed water level in earthquakes epicenter region（Dayao,Yongsheng,Ning′er）with MS≥6.0 strong earthquakes in Yunnan area since 2000.The result shows the common characteristics of water level change in epicenter region before strong earthquakes.Most of strong earthquakes occur during the period of water level going down after gradually going up tiptop.The common characteristics of water level in epicenter region may be helpful to predict place of Yunnan strong earthquakes in the future.The results of statistical analysis show that the high water level in epicenter region before strong earthquakes was caused by rainfall.Since water levels go up or drown,structural stress is accumulated or released,which caused strong earthquakes.This study provides an explanation for the mechanism for earthquake occurrence caused by water motion at earth surface.
出处
《地震》
CSCD
北大核心
2008年第4期52-58,共7页
Earthquake
基金
“十一五”国家科技攻关项目(2006BAC01B02-03-01)
关键词
水位变化
震中区
异常特征
云南地区
Water level change
Epicenter region
Abnormal characteristics
Yunnan region
