通过对调查数据的趋势和多变量分析确定宏观场

Determination of The Macroseismic Field by Means of Trend and Multivariate Analysis of Questionnaire Data

通过多变(相关分析)和趋势分析等统计方法对宏观调查数据进行了解释.这种方法使我们通过评定不同宏观效应叠加的程度、估计调查数据的不确定性更客观地评定烈度.通过滤波确定烈度场的区域分量,使我们消除观测中的局部变化.给出了选取适当滤波参数的准则.本文应用这一方法对发生在意大利的一次地震的调查数据进行了处理.

The interpretation of macroseismic questionnaire data is performed by means of a statistical approach: mul- tivariate (correspondence analysis) and trend analysis . The method allows us to objectively estimate the intensi ty , by evaluating the degree of overlap of different macroseismic effects and by assessing the uncertainty associat ed with the questionnaires. Estimation of the regional component of the intensity field, subsequently allows us to eliminate , by filtering, local varations in the observations. A criteria for selecting appropriate filter parameters is given . We then apply the method to the questionnaires relative to an Italian earthquake.