Data Services Products: EMC-LOWE LOng Wavelength Earth model

Summary

Global transversely isotropic Earth model created by inverting a dataset of 1179 earthquakes using full-waveform inversion.

Description

Name LOWE
Title LOng Wavelength Earth model
Type 3-D Tomography Earth Model
Sub Type Velocity (km/s)
Year 2022
Data Revision r0.0 (revision history)
 
Short Description   Global transversely isotropic Earth model created by inverting a dataset of 1179 earthquakes using full-waveform inversion. 72 iterations were performed at a period range of 100-200 s resulting in a smooth global velocity model which does not contain any 3D imprints of a starting model. The starting model was the one-dimensional isotropic PREM model with a smooth 3D crustal model.
 
Authors: Solvi Thrastarson, Department of Earth Sciences, Institute of Geophysics, ETH Zürich, Sonneggstrasse 5, 8092 Zürich, Switzerland

Dirk-Philip van Herwaarden, Department of Earth Sciences, Institute of Geophysics, ETH Zürich, Sonneggstrasse 5, 8092 Zürich, Switzerland

Lion Krischer, Department of Earth Sciences, Institute of Geophysics, ETH Zürich, Sonneggstrasse 5, 8092 Zürich, Switzerland

Christian Boehm, Department of Earth Sciences, Institute of Geophysics, ETH Zürich, Sonneggstrasse 5, 8092 Zürich, Switzerland

Martin van Driel, Department of Earth Sciences, Institute of Geophysics, ETH Zürich, Sonneggstrasse 5, 8092 Zürich, Switzerland

Michael Afanasiev, Department of Earth Sciences, Institute of Geophysics, ETH Zürich, Sonneggstrasse 5, 8092 Zürich, Switzerland

Andreas Fichtner, Department of Earth Sciences, Institute of Geophysics, ETH Zürich, Sonneggstrasse 5, 8092 Zürich, Switzerland
 
Reference Model N/A
 
Prior Model N/A
 
Model Homepage https://cos.ethz.ch/models.html
 
Model Download LOWE.r0.0.nc (see metadata) (377MB) the model in netCDF 3 Classic format.
LOWE.r0.0-n4.nc (see metadata) (155MB) the same model in netCDF 4 Classic format with compression.
 
Usage Notes The netCDF file is good for visual inspection of the model, for running simulations we recommend downloading the HDF5 version of the model. That version can be obtained from: https://cos.ethz.ch/models.html
 
Depth Coverage 0 to 2880 km, surface to core-mantle boundary
 
Area Global
 
Data Set Description Publicly available waveform data for 1179 earthquakes were downloaded using the FDSN web services and moment tensor data from the GCMT catalog. All data used is public.
 
 

LOWE Figure 1
Figure 1. VSV model at 100 km depths with various datasets overlaid on top. Hotspots in magenta, diverging plate boundaries in black and convergent plate boundaries in yellow.

LOWE Figure 2
Figure 2. VSH and VSV models at varying depth levels. The velocities are parameterized as percentage deviations from the average at each respective depth level.

Citations and DOIs

To cite the original work behind this Earth model:

  • Solvi Thrastarson, Dirk-Philip van Herwaarden, Lion Krischer, Christian Boehm, Martin van Driel, Michael Afanasiev, Andreas Fichtner, Data-adaptive global full-waveform inversion, Geophysical Journal International, Volume 230, Issue 2, August 2022, Pages 1374–1393, https://doi.org/10.1093/gji/ggac122

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.2023.lowe.1

Credits

  • r0.0 model provided by Solvi Thrastarson.

Revision History

revision r0.0: uploaded September 12, 2023.

Timeline

2023-09-13
r0.0 online

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