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arXiv 2109.02567physics.geo-ph
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EPick:用于地震检测和地震相位拾取的基于多类注意力的U型神经网络

EPick: Multi-Class Attention-based U-shaped Neural Network for Earthquake Detection and Seismic Phase Picking

Wei Li, Megha Chakraborty, Darius Fenner, Johannes Faber, Kai Zhou, Georg Ruempker, Horst Stoecker, Nishtha Srivastava

摘要:

地震检测和地震相位拾取不仅在体波(P波和S波)的走时估计中起着至关重要的作用,而且在相应事件的震中定位中也起着至关重要的作用。人工选相是确定相位到达时间的最佳方法,但其能力受到资源和时间的限制。此外,有噪声的地震资料对快速和准确的相位拾取提出了额外的关键挑战。在这项研究中,提出了一种基于深度学习的模型EPick,它受益于U形神经网络(也称为UNet)和注意力机制,作为震波迹象检测和相位拾取的强大替代方案。一方面,UNet结构的利用使得能够解决不同级别的深层特征。另一方面,注意力机制促使UNet结构中的解码器专注于有效利用从编码器部分学习的低分辨率特征,以实现精确的相位拾取。大量的实验结果表明,EPick实现了更好的性能比基准方法,并显示模型的鲁棒性时,测试不同的地震数据集。

英文摘要:

Earthquake detection and seismic phase picking not only play a crucial role in travel time estimation of body waves(P and S waves) but also in the localisation of the epicenter of the corresponding event. Generally, manual phase picking is a trustworthy and the optimum method to determine the phase arrival time, however, its capacity is restricted by available resources and time. Moreover, noisy seismic data renders an additional critical challenge for fast and accurate phase picking. In this study, a deep learning based model, EPick, is proposed which benefits both from U shaped neural network (also called UNet)and attention mechanism, as a strong alternative for seismic event detection and phase picking. On one hand, the utilization of UNet structure enables addressing different levels of deep features. On the other hand, attention mechanism promotes the decoder in the UNet structure to focus on the efficient exploitation of the low-resolution features learned from the encoder part to achieve precise phase picking. Extensive experimental results demonstrate that EPick achieves better performance over the benchmark method, and show the models robustness when tested on a different seismic dataset.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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