Data Services Products: EMC-AFR2022 3D transverse-isotropic seismic model of the African Plate

Summary

A seismic model of the African Plate, made with the technique of full waveform inversion.

Description

Name AFR2022
Title Full-waveform tomography of the African Plate using dynamic mini-batches
Type 3-D Tomography Earth Modell
Sub Type Velocity (km/s)
Year 2023
Data Revision r0.0 (revision history)
 
Short Description   A seismic velocity model of the African Plate, constructed with earthquake data and the technique of full waveform tomography.
 
Authors: Dirk Philip van Herwaarden, Department of Earth Sciences,
Institute of Geophysics, ETH Zurich, 8092 Zurich, Switzerland

Solvi Thrastarson, Department of Earth Sciences, Institute of
Geophysics, ETH Zurich, 8092 Zurich, Switzerland

Vaclav Hapla, Department of Earth Sciences, Institute of
Geophysics, ETH Zurich, 8092 Zurich, Switzerland

Michael Afanasiev, Department of Earth Sciences, Institute of
Geophysics, ETH Zurich, 8092 Zurich, Switzerland, Now at
Mondaic AG

Jeannot Trampert, Department of Earth Sciences, Utrecht
University, Princetonlaan 8a, 3584 CB Utrecht, The Netherlands

Andreas Fichtner, Department of Earth Sciences, Institute of
Geophysics, ETH Zurich, 8092 Zurich, Switzerland
 
Reference Model N/A
 
Prior Model N/A
 
Model Download AFR2022.r0.0.nc (see metadata) is the model with topography in netCDF 3 Classic format.
 
Model Home Page https://cos.ethz.ch/models.html
Depth Coverage 0 700 km
 
Area latitude: -46° to 52°, longitude: -41° to 67°
 
Data Set Description The model AFR2022 is based on recordings of 397 earthquakes recorded between 1997 and 2020. The dataset consists of 184,356 unique source-receiver pairs.
 
 

vSV parameter at 70 km depth
The final model of the vSV parameter at 70 km depth. Perturbations are plotted with respect to the lateral mean. Volcano locations are indicated with black triangles. These correspond well to low-velocity regions in the model. The main cratons (Begg et al., 2009) are indicated on the map: WA: West African Craton, KA: Kalahari Craton, CNG: Congo Craton. SM: Saharan Metacraton. Other features: EARS: East African Rift System, CVL: Cameroon Volcanic Line, AT: Atlas Mountains, HG: Hoggar Mountains, TI: Tibesti Mountains, DD: Darfur Dome, ATJ: Afar Triple Junction, CV: Cape Verde, WR: Walvis Ridge, CM: Comoro Volcanic Islands.

Citations and DOIs

To cite the original work behind this Earth model:

  • Herwaarden, D.-P. v., Thrastarson, S., Hapla, V., Afanasiev, M., Trampert, J., & Fichtner, A. (2023). Full-waveform tomography of the African Plate using dynamic mini-batches. Journal of Geophysical Research: Solid Earth, 128, e2022JB026023. https://doi.org/10.1029/2022JB026023

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.africa.fwi.1

References

  • G.C. Begg, W.L. Griffin, L.M. Natapov, Suzanne Y. O’Reilly, S.P. Grand, C.J. O’Neill, J.M.A. Hronsky, Y. Poudjom Djomani, C.J. Swain, T. Deen, P. Bowden; The lithospheric architecture of Africa: Seismic tomography, mantle petrology, and tectonic evolution. Geosphere 2009;; 5 (1): 23–50. https://doi.org/10.1130/GES00179.1

Credits

  • r0.0 model provided by Dirk Philip van Herwaarden.

Revision History

revision r0.0: uploaded June 5, 2023.

Timeline

2023-06-06
online

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