李泽峰 博士生导师  

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学位:博士

学科: 地球物理学

论文成果

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Global Search of PKP Precursors With Graph Neural Network: Implications for Scatterers in the Lowermost Mantle

发布时间:2025-08-31
点击次数:
DOI码:
10.1029/2025gl115952
所属单位:
中国科学技术大学地球和空间科学学院
发表刊物:
Geophysical Research Letters
刊物所在地:
美国
摘要:
Seismic waves preceding the core phase PKIKP, known as PKP precursors, have been used to map small scatterers near the core‐mantle boundary (CMB). However, their low signal‐to‐noise ratio has required manual identification, hindering systematic and comprehensive analysis. Here, we develop GraphCursor, a model based on Graph Neural Networks (GNNs), to detect PKP precursors across multiple stations. Trained on manually picked precursors, GraphCursor identifies 37,512 precursor waveforms from 5,499 global earthquakes (2000–2024). We locate scatterers by stacking multistation probability functions
第一作者:
Shang Ma
合写作者:
李泽峰, Daoyuan Sun, Yulong Su, Jiewen Li, Xu Si, Jun Zhu
论文类型:
期刊论文
通讯作者:
李泽峰
论文编号:
43
学科门类:
理学
一级学科:
地球物理学
文献类型:
SCI
卷号:
52
期号:
17
页面范围:
e2025GL115952
ISSN号:
0094-8276
是否译文:
否
发表时间:
2025-08-31
发布期刊链接:
https://doi.org/10.1029/2025gl115952