空间光滑活动模型在东部海域地震危险性评价中的应用

摘要

Choosing the East China offshore areas as the study area (25° ～41°N,117° ～ 126°E),we divided the seismotectonic unit based on the regional seismotectonic setting and earthquake activity level etc.,and calculated the earthquake occurrence rate of each grid point by using seismic activity parameter evaluation method of circular-Gaussian smoothing model based on the input earthquake catalog and fault-rupture-oriented elliptical smoothing model.On the basis on the grid source,we obtained the division maps of ground acceleration peak with exceedance probability of 10％ in 50 years by seismic hazard probability evaluation method.%以中国东部近海海域(25～41°N,117～126°E)为研究区域,基于区域地震构造背景和地震活跃水平等资料划分地震构造单元,依次采用基于地震目录的圆形高斯光滑模型和断层导向性的椭圆光滑模型的地震活动参数评价方法,计算各网格点的地震发生率.并利用网格源的地震危险性概率评价方法,由不同输入地震目录得到该区域50年超越概率10％的加速度峰值区划结果.