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首页> 外文期刊>Journal of geophysical research. Solid earth: JGR >Joint Inversion of Coseismic and Early Postseismic Slip to Optimize the Information Content in Geodetic Data: Application to the 2009 Mw6.3 L'Aquila Earthquake, Central Italy
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Joint Inversion of Coseismic and Early Postseismic Slip to Optimize the Information Content in Geodetic Data: Application to the 2009 Mw6.3 L'Aquila Earthquake, Central Italy

机译：COSEISMIC和早期后期滑动的联合反演，优化大地测量数据中的信息内容：应用于2009 MW6.3 L'AQUILA地震，意大利

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摘要

When analyzing the rupture of a large earthquake, geodetic data are often critical. These data are generally characterized by either a good temporal or a good spatial resolution, but rarely both. As a consequence, many studies analyze the coseismic rupture with data that also include one or more days of early postseismic deformation. Here, we invert simultaneously for the coseismic and postseismic slip with the condition that the sum of the two models remains compatible with data covering the two slip episodes. We validate the benefits of this approach with a toy model and an application to the 2009 M_w6.3 L'Aquila earthquake, using a Bayesian approach and accounting for epistemic uncertainties. For the L'Aquila earthquake, we find that if early postseismic deformation is not an explicitly acknowledged coseismic signal, coseismic slip models may overestimate the peak amplitude while long-term postseismic models may largely underestimate the total postseismic slip amplitude. This example illustrates how the proposed approach could improve our comprehension of the seismic cycle, fault frictional properties, and the spatial and temporal relationship between seismic rupture, afterslip, and aftershocks.
机译：在分析大地震的破裂时，大地测量数据往往是至关重要的。这些数据通常通过良好的时间或良好的空间分辨率来表征，但很少都是。因此，许多研究分析了与早期后发变形的一天或多天的数据分析了电影发电机破裂。在这里，我们同时反转了电影发射和后近滑动，其中两种模型的总和与覆盖两个滑移剧集的数据保持兼容。我们用玩具模型验证了这种方法的好处，并应用于2009 M_W6.3 L'Aquila地震，使用贝叶斯方面的方法和核算认知不确定因素。对于L'Aquila Stearquake，我们发现，如果发后变形不是明确确认的电影发射信号，CoSebic Sli模型可能会高估峰值幅度，而长期后射模型可能在很大程度上低估了全后的断后滑动幅度。该示例说明了所提出的方法如何改善我们对地震循环，故障摩擦性质以及地震破裂，余损和余震之间的空间和时间关系的理解。

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