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首页> 外文期刊>Earth, planets and space: EPS >Determination of temporal distribution of moment release using long period body wave data: the case of the 2003 Tokachi-Oki earthquake
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Determination of temporal distribution of moment release using long period body wave data: the case of the 2003 Tokachi-Oki earthquake

机译：利用长期体波数据确定瞬间释放的时间分布：以2003年十胜冲田地震为例

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We performed waveform inversion of long period body wave data to investigate whether it is possible to determine the moment release distribution in time and space, using the 2003 Tokachi-Oki earthquake as an example. Our results show that it is difficult to determine the precise spatial distribution, and therefore we focused on determination of the temporal distribution. We allowed changes of the source mechanism during rupture in the inversion scheme. The temporal change of the scalar moment of the subevents was consistent with the moment rate function inferred from other studies. The source mechanisms of the subevents were primarily reverse faults, matching preliminary reports of this earthquake. No significant change of the source mechanism during the rupture were inferred. Our results suggest that the rupture process of this earthquake was rather simple.
机译：我们以2003年的十胜冲田地震为例，对长周期体波数据进行了波形反演，以研究是否有可能确定时空的矩释放分布。我们的结果表明很难确定精确的空间分布，因此我们将重点放在确定时间分布上。在反演方案中，我们允许在破裂过程中改变震源机制。子事件的标量矩的时间变化与从其他研究中得出的矩速率函数一致。子事件的源机制主要是逆断层，与这次地震的初步报道相吻合。推断破裂过程中的来源机制没有明显变化。我们的结果表明，这次地震的破裂过程相当简单。

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