Data Services Products: EMC-FWEA23 Full-waveform tomography model of East Asia (FWEA23)

Summary

FWEA23 is a high-resolution seismic P- and S-wave velocity model of the crust and mantle beneath East Asia. It’s produced by full-waveform adjoint inversion using a large dataset.

Description

Name FWEA23
Title Full-waveform tomography model of East Asia (FWEA23)
Type 3-D Tomography Earth Model
Sub Type Radial anisotropic (in the upper 220 km) P and S velocities
Year 2024
Data Revision r0.0 (revision history)
 
Short Description   FWEA23 is a high-resolution seismic P- and S-wave velocity model of the crust and mantle beneath East Asia. It’s produced by full-waveform adjoint inversion using a large dataset.
 
Authors: Chujie Liu (lcj2012@utexas.edu), Department of Earth and Planetary Sciences, University of Texas at Austin, Austin, TX 78712, USA

Rupak Banerjee, Department of Earth Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India

Stephen P. Grand, Department of Earth and Planetary Sciences, University of Texas at Austin, Austin, TX 78712, USA

Eric Sandvol, Department of Geological Sciences, University of Missouri, Columbia, MO 65211, USA

Supriyo Mitra, Department of Earth Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India

Xiaofeng Liang, State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

Shengji Wei, Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore

 
Reference Model CRUST1.0 in the crust and a 1-D model in the mantle. Parameters vp0 and vs0 in the model file represent P- and S-wave reference models, respectively.
 
Prior Model FWEA18
 
Model Download FWEA23.r0.0.nc size: 365MB (see metadata) is the model in netCDF 3 Classic format.
FWEA23.r0.0-n4.nc size: 200MB (see metadata)the same model in netCDF 4 Classic format with compression.
 
Model Home Page None
 
Depth Coverage 0 to 1000 km
 
Area East Asia (5° S to 55° N and 65° E to 150° E)
 
Data Set Description A total of 141 earthquakes and 4640 seismic stations were used in this study. The earthquakes were from 2008 to 2018 and had magnitudes ranging from Mw 5.5 to 7.2. The body wave windows were filtered to 15-100 s and the surface wave windows were filtered to 25-100 s and 70-130 s.
 

Map views of isotropic S-wave velocity perturbations

Map views of isotropic S-wave velocity perturbations
Map views of isotropic S-wave velocity perturbations in model FWEA23 at depths from 50 to 700 km. Red lines represent trenches and black lines depict tectonic unit boundaries. Notable geological blocks with fast velocity anomalies are labeled as follows: SB (Sichuan Basin), OB (Ordos Block), TB (Tarim Basin), QB (Qaidam Basin), and KB (Khorat Basin). Red triangles indicate Holocene volcanoes (Global Volcanism Program, 2023). Many of these volcanoes are clearly associated with slow anomalies in model FWEA23 and are marked with a black circle and labeled as: V1 (Tengchong volcano), V2 (Changbaishan volcano), V3 (Kunlun volcano), and V4 (Jom-Bolok volcano). S1, S2, and S3 refer to slow regions beneath Japan Sea, Southeast Asia, and northern Tibet. IND: Indian plate.

Citations and DOIs

To cite the original work behind this Earth model:

  • Chujie Liu, Rupak Banerjee, Stephen P. Grand, Eric Sandvol, Supriyo Mitra, Xiaofeng Liang, Shengji Wei, A high-resolution seismic velocity model for East Asia using full-waveform tomography: Constraints on India-Asia collisional tectonics, Earth and Planetary Science Letters, Volume 639, 2024, 118764, ISSN 0012-821X, https://doi.org/10.1016/j.epsl.2024.118764.

To cite IRIS DMC Data Products effort:

  • Trabant, C., A. R. Hutko, M. Bahavar, R. Karstens, T. Ahern, and R. Aster (2012), Data Products at the IRIS DMC: Stepping Stones for Research and Other Applications, Seismological Research Letters, 83(5), 846–854, https://doi.org/10.1785/0220120032.

DOI for this EMC webpage: https://doi.org/10.17611/dp/emc.2024.fwea23.1

Credits

  • r0.0 model provided by Chujie Liu.

Revision History

revision r0.0: uploaded May 30, 2024.

Timeline

2024-06-04
r0.0 online

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