Data Services Products: EMC-FWEA18 Full waveform inversion of East Asia


FWEA18 Earth model represents a full waveform inversion model for East Asia.


Name FWEA18
Title Full waveform inversion of East Asia
Type 3-D Tomography Earth Model
Sub Type Radial anisotropic (in the uppermost mantle) P and S velocities
Year 2018
Short Description   In this model, radial anisotropy is confined to the uppermost mantle (above 220 km). 1D Qmu model is fixed to QL6 (Durek & Ekström, 1996). All velocities are at 1 Hz.
K. Tao
The Unconventional Natural Gas Institute
China University of Petroleum (Beijing)
Beijing, China

S. P. Grand
Department of Geological Sciences
The University of Texas
Austin, Texas, USA

F. N. Niu
Department of Earth Sciences
Rice University
Houston, Texas, USA

Previous Model N/A
Reference Model N/A
Model Download (metadata ), is the netCDF file for the model
Model Homepage
Depth Coverage Upper Mantle (0 to 800 km)
Areal Coverage East Asia (N10°/60°, E90°/150°)
Data Set Description [ Tao et al. (2018) ] A total of 95 earthquakes and 1590 seismographic stations were used in this study. The final dataset is comprised of ~1.35 million body wave windows (10 – 100 sec) and ~72 thousand surface wave traces (40 – 100sec).

FWEA18 horizontal cross sections
Figure 1. Horizontal cross sections of relative perturbations in the Voigt averaged isotropic S-velocity at depths ranging from 80 km to 750 km. The number on the left top of each figure shows the depth and the number on the right top shows the average velocity at this depth. Red lines delineate plate boundaries and red triangles show the location of the Holocene volcanoes. The seismicity within 50 km at each depth is shown as white dots.

Citations and DOIs

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,

To cite the source of this Earth model:

  • Tao K., Grand S. P. and Niu F. N. (2018), Seismic structure of the upper mantle beneath Eastern Asia from full waveform seismic tomography, Geochemistry, Geophysics, Geosystems 10.1029/2018GC007460.

To reference the use of this Earth model hosted by EMC:

To cite IRIS Earth Model Collaboration (EMC) data product or reference use of its repository:


Durek, J.J. and Ekstrom, G. 1996. “A radial model of anelasticity consistent with long period surface wave attenuation.” Bull. Seism. Soc. Am. 86:144-158.


  • K. Tao, S. P. Grand, & F. N. Niu




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