摘要
利用甘青地区近年来在活动断裂地质填图，专题研究及地震安全性评价等方面所获得的大量成套的地震地质资料，充分考虑断裂几何学特征、活动性质、活动时代、滑动速率、历史地震及古地震复发间隔、离逝时间等特征的差异，划分出了不同地震危险程度的区段。同时结合该区强震活动的时空特征对甘青地区未来２０年内发生强震的危险区段进行了综合判定，认为本区未来２０年内是强震的多发时期，今后几年内存在发生６级以上甚至７级左右强震的较大危险性。
According to the active fault data of mapping,monographic study and seismic hazard assessment of large and important engineering projects in Gansu and Qinghai areas,fully considering the differences of fault features in geometry,kinematic characteristic,active age,slip rate,historical earthquakes,palaeoearthquake recurrence,elapse time et al,the authors divide several different risk degree earthquake regions.At the same time,thinking about the time and space migration and circulation features of strong earthquake activities,the authors predict the risk segments of strong earthquake in the future of 20 years in Gansu and Qinghai areas,the result indicates that it will be a frequency occurring period of strong earthquakes in the future of 20 years,especially,there is much possibility of occurring Ms≥6～7 earthquakes in several years later.
出处
《高原地震》
1998年第3期10-17,共8页
Plateau Earthquake Research
关键词
破裂分段
地震危险区
地震评估
地震活动
甘青地区
rupture segmentation Earthquake risk region Earthquake assessment Seismicity Gansu and Qinghai areas
