Travel time picking of ambient noise cross-correlation using a deep neural network combining convolutional neural networks and Transformer

• Autorzy: Jin Chunwei , Ye Fang , Zhang Han , Bao Xue

Identyfikatory

DOI

10.1007/s11600-023-01088-3

• Języki publikacji: EN

Abstrakty

EN

The travel time of ambient noise cross-correlation is widely used in geophysics, but traditional methods for picking the travel time of correlation are either difficult to be applied to data with low signal-to-noise ratio (SNR), or make some assumptions which fail to be achieved in many realistic situations, or require a lot of complex calculations. Here, we present a neural network based on convolutional neural networks (CNN) and Transformer for the travel time picking of ambient noise crosscorrelation. CNNs expand the dimension of the vector of each time step for the input of Transformer. Transformer focuses the model’s attention on the key parts of the sequence. Model derives the travel time according to the attention. 102,000 cross-correlations are used to train the network. Compared with traditional methods, the approach is easy to use and has a better performance, especially for the low SNR data. Then, we test our model on another ambient noise cross-correlation dataset, which contains cross-correlations from different regions and at different scales. The model has good performance on the test dataset. It can be seen from the experiment that the travel time of the cross-correlation function of ambient noise with an average SNR as low as 9.3 can be picked. 97.2% of the picked travel times are accurate, and the positive and negative travel time of most cross-correlations are identical (90.2%). Our method can be applied to seismic instrument performance verification, seismic velocity imaging, source location and other applications for its good ability to pick travel time accurately.

Słowa kluczowe

EN

ambient seismic noise; travel time picking; deep learning; convolutional neural network; transformer

PL

lokalny szum sejsmiczny; wybór czasu podróży; głęboka nauka; konwolucyjna sieć neuronowa; transformator

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2024
• Tom: Vol. 72, no. 1
• Strony: 97--114
• Opis fizyczny: Bibliogr. 35 poz.

Twórcy

autor

Jin Chunwei

• College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, Zhejiang, China

autor

Ye Fang

• College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, Zhejiang, China

autor

Zhang Han

• College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, Zhejiang, China

autor

Bao Xue

• College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, Zhejiang, China

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