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  • Presentation | S51D: Seismic Imaging from Crust to Core: Understanding Ancient and Contemporary Processes V Poster
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  • S51D-0146: A Comprehensive Crustal Coda Attenuation Map of Continental China
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  • Board 0146‚ Hall EFG (Poster Hall)
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Author(s):
Wei Wang, Organization Not Listed (First Author, Presenting Author)
Yang Fan, Institute of Geology and Geophysics, Chinese Academy of Sciences
Sidan Chen, Institute of Geology and Geophysics, Chinese Academy of Sciences
Li Sun, China Earthquake Networks Center
Wenze Deng, CENC China Earthquake Networks Center
Nozomu Takeuchi, Earthquake Research Institute, University of Tokyo
Juan Li, Institute of Geology and Geophysics, Chinese Academy of Sciences


Seismic coda wave attenuation QC serves as a sensitive indicator of subsurface heterogeneity and thermal state. Continental China, being highly tectonically active region, experiences significant deformation due to plate boundary interactions. Using seismic data spanning over one decade, we estimated QC at broadband frequencies (1.0, 1.5, 3, 6, 10, 14 Hz) and found distinct regional patterns. Stable regions like Northeast, South, and North China show higher QC , while tectonically active areas such as Xinjiang, the Tibetan Plateau, and the North-South Seismic Belt have lower values. Notably, we found a robust negative correlation between QC and shear strain rate that strengthens with frequency, indicating attenuation is stress-dependent in the crust.



Scientific Discipline
Neighborhood
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