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首页> 外文期刊>Pure and Applied Geophysics >New Source Duration Relationships for Mexican Earthquakes: Practical Application to Stochastic Summation Methods
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New Source Duration Relationships for Mexican Earthquakes: Practical Application to Stochastic Summation Methods

机译：墨西哥地震的新源持续时间关系：随机求和方法的实际应用

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From the gathering of 127 source time functions (STFs) of seismic events in Mexico, relationships have been developed between the seismic moment (M-0) and the total source rupture duration (tau(d)), for normal-faulting inslab, interplate and strike-slipe mechanisms. This relationship has been explored by different authors like Furomoto and Nakanishi (J Geophys Res 88:2191-2198, 1983), Tanioka and Ruff (Seismol Res Lett 68:386-400, 1997), Singh et al. (Bull Seismol Soc Ame 90:468-482, 2000), among others; the latter authors present a similar general relationship for Mexico, considering 53 STFs and with information until 1998. In this research, complementary databases have been integrated, and the available functions updated base on recent research works about the SCARDEC method are used (Vallee et al. in Geophys J Int 184:338-358, 2011; Vallee and Douet in Phys Earth Planet Interiors 257:149-157, 2016). With the proposed expressions, it is possible to estimate reasonably, the main parameters of interest for algorithms of stochastic summation, such as the corner frequencies or stress drops in order to simulate strong ground motions, commonly used for source-rupture studies, site-amplification analysis, or for earthquake-resistant design. Besides, a new flexible model of stochastic summation is presented, which allows considering several ways to generate more realistic motions, according to the spectral behavior, both for low and for intermediate frequencies, under earthquakes with moderate and high magnitude; this model was compared with results from a two-stage alternative method considering two corner frequencies.
机译：从墨西哥的地震事件的127次源时间函数（STF）来源，在地震时刻（M-0）和总源破裂持续时间（TAU（D））之间的关系已经开发了常规故障INSLAB，INTERALE和罢工lelipe机制。这种关系已被呋喃托托和Nakanishi等不同作者探索（J Geophys Res 88：2191-2198,1983），Tanioka和Ruff（Seismol Res Lett 68：386-400,1997），Singh等人。 （公牛Seismol Soc Ame 90：468-482,2000），其中包括;后者提出了对墨西哥的一般关系，考虑到53 STF和信息直到1998年。在这项研究中，已经整合了互补数据库，并使用了最近的研究基础的可用功能关于SCARDEC方法（Vallee等） 。在Geophys J int 184：338-358,1111中; Vallee和Phy Malit地球星球室内的Douet 257：149-157,2016）。通过提出的表达，可以合理地估计随机求和的算法的主要参数，例如角频率或压力下降，以模拟强大的地面运动，常用于源破裂研究，站点放大分析，或用于抗震设计。此外，介绍了一种新的柔性级别的随机求和模型，这允许考虑几种方法，根据光谱行为，既不用于低和中间频率，均以中等和高幅度的地震而产生更现实的运动;将该模型与考虑两个角频率的两级替代方法进行了比较。

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