【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 .更多还原

【Abstract】 The problems of spatial temporal distribution characters,the process of evolution and 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 with M S≥7.0 in the area.更多还原