基于MapInfo的地震烈度发生概率计算方法

Computational Method of Occurrence Probability of Earthquake Intensity Based on MapInfo

本文详细介绍使用MapBasic语言编制,基于离散化后预测单元各震级档的地震发生概率,计算场点地震烈度发生概率的程序。通过交换求和方式,简化了计算程序。以四川省为例,计算四川区域范围内地震烈度年发生概率,结果以网格点(0.1°×0.1°网格)和乡镇形式给出。计算结果直接用于GIS数据库平台的管理,为地震危险性分析程序与GIS的结合打下一定的基础。

Based on estimation for occurrence probability of earthquake at given grid cells and every magnitude, the authors introduce the method of editing program for computing the intensity probability of all cells of site with MapBasic language The computing program is simplified by summation exchange. Take Sichuan Province as an example, the intensity probability of Sichuan Province in a year is computed and the results are described by two methods, one in 0.1° × 0.1° prediction cell, the other based on the sites of villages and town. Those results can be directly used on database of GIS, and lay a foundation for the combination between seismic hazard analysis and GIS.