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作为震级与距离函数的地震烈度预测方程是地震危险和风险评估及解释当代和历史地震信息的有用工具。在过去的几年中,Atkinson与Wald的地震烈度预测方程(2007;下文中称AW07)在“你感觉到了吗?”(DYFI)项目下描述报告的地震动水平和烈度方面一直非常成功。使用2000到2013年的DYFI观测数据的扩展编辑数据库对北美地震的AW07性能的评估检验表明,不存在修正这些方程的统计基础。但AW07方程的一个问题是它们对大震(M>6)预测了在近距离处的不切实际的中值烈度。在本研究中,通过协调地震烈度方程和地震动预测方程,我们修正了AW07,改善了大地震在近距离的烈度标度。
Seismic intensity prediction equations as a function of magnitude and distance are useful tools for earthquake hazard and risk assessment and interpretation of contemporary and historical seismic information. In the past few years, the seismic intensity prediction equation (2007; hereinafter AW07) by Atkinson and Wald has been extremely successful at describing the reported ground motion levels and intensities under the DYFI project . An assessment of the AW07 performance of North American earthquakes using an extended editing database of DYFI observations from 2000 to 2013 shows that there is no statistical basis to correct these equations. But one problem with the AW07 equation is that they predict unrealistic median intensities at close range for large earthquakes (M> 6). In this study, we modified AW07 by coordinating the seismic intensity equation with the ground motion prediction equation to improve the intensity scale of large earthquakes at close range.