Selection and ranking of ground motion models for seismic hazard analysis in the Pyrenees
Selection and ranking of ground motion models for seismic hazard analysis in the Pyrenees
复制标题
用于比利牛斯山脉地震灾害分析的地面运动模型的选择和排序
DOI：
10.1007/s10950-006-9039-6
复制
发表时间：
2007
影响因子：
1.6
通讯作者：
A. Souriau
中科院分区：
文献类型：
--
作者：
S. Drouet;F. Scherbaum;F. Cotton;A. Souriau
本文讨论的问题是客观地选择合适的地震动模型进行比利牛斯山地区的地震危险性评估。Scherbaum等人（2004 a）的方法被用于对8个已发表的与板内或低变形率背景相关的地面运动模型进行排序。该方法基于一个透明的数据驱动过程，该过程量化了模型拟合，并衡量了基本模型假设的满足程度。该方法适用于15个加速度记录在比利牛斯山获得的事件的本地震级在4.8和5.1之间，对应的时刻震级范围从3.7到3.9。仅考虑岩石站点的站点。共720个频谱振幅被用来排名选定的地面运动模型。这些模型的一些控制参数，例如幅度和距离定义，可能因模型而异。因此，重要的是要纠正选定的模型，因为它们在比利牛斯山数据所用的震级和距离定义方面存在差异。我们的分析表明，这些修正，一些地面运动模型成功地拟合数据。这些模型是Lussou等人（2001年）和Berge-Thierry等人（2003年）的模型。根据所选的地震动模型，提出了一个可能的情况下，6级地震，它预测的反应谱加速度为0.08 - 0.1gat1Hz的震源距离为10公里。
The issue addressed in this paper is the objective selection of appropriate ground motion models for seismic hazard assessment in the Pyrenees. The method of Scherbaum et al. (2004a) is applied in order to rank eight published ground motion models relevant to intraplate or to low deformation rate contexts. This method is based on a transparent and data-driven process which quantifies the model fit and also measures how well the underlying model assumptions are met. The method is applied to 15 accelerometric records obtained in the Pyrenees for events of local magnitude between 4.8 and 5.1, corresponding to moment magnitudes ranging from 3.7 to 3.9. Only stations at rock sites are considered. A total of 720 spectral amplitudes are used to rank the selected ground motion models. Some control parameters of these models, such as magnitude and distance definitions, may vary from one model to the other. It is thus important to correct the selected models for their difference with respect to the magnitude and distance definitions used for the Pyrenean data. Our analysis shows that, with these corrections, some of the ground motion models successfully fit the data. These are the Lussou et al. (2001) and the Berge-Thierry et al. (2003) models. According to the selected ground motion models, a possible scenario of a magnitude 6 event is proposed; it predicts response spectra accelerations of 0.08–0.1gat 1 Hz at a hypocentral distance of 10 km.