【摘要】 中强以上地震在时空分布上具有明显的网络性和层次性。本项研究表明：甘肃及邻区发生的中强以上地震（1955—1987）有88％分布在网络的结点及其附近；在此基础上，考虑地震活动总趋势判定结果、近期小震活动特征、大震减震效应诸因素，用模式识别方法判定出了该区强震的危险地点，并给出了各危险区未来十年的发震概率。更多还原

【Abstract】 Medium-strong earthquake distribution in space and time is characterized by network and layer. The results show: 88% medium-strong earthquakes (1955-1987) occurred in and near the nodes of network in Gansu province and its adjacent area; on this basis, considering the seismicity tendency determination, small-size earthquakes, shock absorption effect and other factors, the authors determine the strong earthquake risk regions and the probabitity of earthquake occurrence in each risk region in the future ten years by using pattern recognition method.更多还原