则木河断裂带断层活动特征与中强震关系浅析

Brief Relation Analysis between Activity Feature of Zemuhe Fault and Medium-strong Earthquakes

通过对则木河断裂带上4个跨断层形变测点资料的分析,认为则木河断裂带断层活动分为4个不同的活动时段,其不同活动时段断层张压结合;在川滇交界区域发生中强地震前则木河断裂带跨断层形变资料中能捕捉到一定的前兆信息,地震大多发生在形变异常结束后50d内。

Analyzing the data of the four deformation observational points which are across the Zemuhe Fault,we consider that the activity periods of the Zemuhe Fault is divided into four,during which,the upper side wall and the lower side wall of the fault stretches and presses each other.Based on the data of cross Zemuhe Fault deformation,we can catch some earthquake precursor before the medium-strong earthquakes occur in the juncture region between Sichuan province and Yunnan province.The earthquake almost occurs in 50 days after the deformation anomaly.