青藏高原北部地区7级以上地震孕育演化特征及其应用研究

THE FEATURES OF EVOLUTION OF MS ≥ 7.0 EARTHQUAKES IN NORTHERN PART AREA OF THE QINGHAI-XIZANG PLATEAU AND THEIR APPLICATION

摘要:

研究了青藏高原北部地区7级以上地震活动的时空分布特征、孕育演化过程及其不均匀性等问题.结果表明,本区7级以上地震前的中强地震活动场具有一定的共性特征,表现为地震孕育的阶段性及其不同的地震活动异常现象,利用这些特征可进行7级以上地震震情形势及其阶段性的判定研究,对本区的7级以上地震预测具有实用价值.

Abstract:

The problems of spatial-temporal distribution characters,the process of evolutionand its inhomogeneity of M_S ≥ 7.0 earthquakes in northern part area of Qinghai-Xizang Plateau have been studied.The results show that the active fields of moderate-strong earthquakes have some common features which have appeared before M_S ≥ 7.0 earthquakes,and have several stages in gestation process with different active abnormal phenomenon.These features can be used to judge the tendency and preparation stages,and have practice value for prediction of the events w ith M_S ≥ 7.0 in the area.