【摘要】 着重研究了由于统计时段选取不唯一性产生的地震活动性参数的不确定性 ,对全国310个地级市以上城镇地震危险性估计的影响 ;并绘出中国大陆分区 5 0年不同超越概率水平下烈度平均变化值和峰值加速度平均相对变化值示意图 ,为实地地震安全性评价提供了有价值的参考数据 .更多还原

【Abstract】 The influence on seismic hazard estimation for 310 cities and towns in the whole nation are studied in particular, owing to uncertainty of seismicity parameters caused by non uniqueness in selecting statistical time ranges. And the regional sketch maps of the average varying values of intensity and the average relative varying values of peak acceleration with different probability of exceedance in 50 years are drawn in the Chinese mainland.更多还原