Frontiers in Earth Science (May 2021)

Magnitude Estimation for Earthquake Early Warning Using a Deep Convolutional Neural Network

  • Jingbao Zhu,
  • Jingbao Zhu,
  • Shanyou Li,
  • Shanyou Li,
  • Jindong Song,
  • Jindong Song,
  • Yuan Wang,
  • Yuan Wang

DOI
https://doi.org/10.3389/feart.2021.653226
Journal volume & issue
Vol. 9

Abstract

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Magnitude estimation is a vital task within earthquake early warning (EEW) systems (EEWSs). To improve the magnitude determination accuracy after P-wave arrival, we introduce an advanced magnitude prediction model that uses a deep convolutional neural network for earthquake magnitude estimation (DCNN-M). In this paper, we use the inland strong-motion data obtained from the Japan Kyoshin Network (K-NET) to calculate the input parameters of the DCNN-M model. The DCNN-M model uses 12 parameters extracted from 3 s of seismic data recorded after P-wave arrival as the input, four convolutional layers, four pooling layers, four batch normalization layers, three fully connected layers, the Adam optimizer, and an output. Our results show that the standard deviation of the magnitude estimation error of the DCNN-M model is 0.31, which is significantly less than the values of 1.56 and 0.42 for the τc method and Pd method, respectively. In addition, the magnitude prediction error of the DCNN-M model is not affected by variations in the epicentral distance. The DCNN-M model has considerable potential application in EEWSs in Japan.

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