Comparison of the earthquake detection abilities of PhaseNet and EQTransformer with the Yangbi and Maduo earthquakes

• Published in: Earthquake science Vol. 34; no. 5; pp. 425 - 435
• Main Authors: Jiang, Ce, Fang, Lihua, Fan, Liping, Li, Boren
• Format: Journal Article
• Language: English
• Published: Institute of Geophysics,China Earthquake Administration,Beijing 100081,China 01.10.2021; Institute of Disaster Prevention,Sanhe 065201,China%Institute of Geophysics,China Earthquake Administration,Beijing 100081,China; Guangdong Earthquake Agency,Guangzhou 510070,China%Institute of Geophysics,China Earthquake Administration,Beijing 100081,China; Key Laboratory of Earthquake Source Physics,China Earthquake Administration,Beijing 100081,China
• Subjects: deep learning; Maduo earth-quake; EQTransformer; earthquake detection; PhaseNet; Yangbi earthquake
• ISSN: 1674-4519
• DOI: 10.29382/eqs-2021-0038

PhaseNet and EQTransformer are two state-of-the-art earthquake detection methods that have been increasingly applied worldwide.To evaluate the generaliz-ation ability of the two models and provide insights for the development of new models,this study took the sequences of the Yunnan Yangbi M6.4 earthquake and Qinghai Maduo M7.4 earthquake as examples to compare the earthquake detection effects of the two abovementioned models as well as their abilities to process dense seismic sequences.It has been demonstrated from the corresponding research that due to the differences in seismic waveforms found in different geographical regions,the picking performance is reduced when the two models are applied directly to the detection of the Yangbi and Maduo earthquakes.PhaseNet has a higher recall than EQTransformer,but the recall of both models is reduced by 13％-56％when compared with the results rep-orted in the original papers.The analysis results indicate that neural networks with deeper layers and complex structures may not necessarily enhance earthquake detection perfor-mance.In designing earthquake detection models,attention should be paid to not only the balance of depth,width,and architecture but also to the quality and quantity of the training datasets.In addition,noise datasets should be incorporated during training.According to the continuous waveforms detected 21 days before the Yangbi and Maduo earthquakes,the Yangbi earthquake exhibited foreshock,while the Maduo earthquake showed no foreshock activity,indicating that the two earthquakes'nucleation processes were different.