Deep learning models for regional phase detection on seismic stations in Northern Europe and the European Arctic

IF 2.8 3区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS
Erik B Myklebust, Andreas Köhler
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引用次数: 0

Abstract

Summary Seismic phase detection and classification using deep learning is so far poorly investigated for regional events since most studies focus on local events and short time windows as the input to the detection models. To evaluate deep learning on regional seismic records, we create a dataset of events in Northern Europe and the European Arctic. This dataset consists of about 151,000 three component event waveforms and corresponding phase arrival picks at stations in mainland Norway, Finland, and Svalbard. We train several state-of-the-art and one newly-developed deep learning model on this dataset to pick P and S wave arrivals. The new method modifies the popular PhaseNet model with new convolutional blocks including transformers. This yields more accurate predictions on the long input time windows associated with regional events. Evaluated on event records not used for training, our new method improves the performance of the current state-of-the-art methods when it comes to recall, precision and pick time residuals. Finally, we test our new model for continuous mode processing on four days of single-station data from the ARCES array. Results show that our new method outperforms the existing array detector at ARCES. This opens up new opportunities to improve automatic array processing with deep learning detectors.
用于北欧和欧洲北极地区地震台站区域相位检测的深度学习模型
摘要 到目前为止,使用深度学习对区域事件进行地震相位检测和分类的研究还很少,因为大多数研究都集中在局部事件和作为检测模型输入的短时间窗口上。为了评估区域地震记录的深度学习,我们创建了一个北欧和欧洲北极地区的事件数据集。该数据集包括约 151,000 个三分量事件波形以及挪威大陆、芬兰和斯瓦尔巴群岛台站的相应相位到达采样。我们在该数据集上训练了几个最先进的模型和一个新开发的深度学习模型,以挑选 P 波和 S 波到达。新方法利用包括变压器在内的新卷积块修改了流行的 PhaseNet 模型。这样就能对与区域事件相关的长输入时间窗进行更准确的预测。通过对未用于训练的事件记录进行评估,我们的新方法在召回率、精确度和采样时间残差方面提高了当前最先进方法的性能。最后,我们在 ARCES 阵列的四天单站数据上测试了新模型的连续模式处理能力。结果表明,我们的新方法优于 ARCES 现有的阵列探测器。这为利用深度学习探测器改进阵列自动处理带来了新的机遇。
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来源期刊
Geophysical Journal International
Geophysical Journal International 地学-地球化学与地球物理
CiteScore
5.40
自引率
10.70%
发文量
436
审稿时长
3.3 months
期刊介绍: Geophysical Journal International publishes top quality research papers, express letters, invited review papers and book reviews on all aspects of theoretical, computational, applied and observational geophysics.
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