SAAM23 is an elastic model for South America with transverse isotropy confined to the upper mantle, similar to its starting model, S362ANI.
|Title||South American Adjoint Model—iteration 23|
|Type||3-D Tomography Earth Model|
|Sub Type||Anisotropic (in the uppermost mantle)|
|Data Revision||r0.0 (revision history)|
|Short Description|| An elastic model for South America with transverse
isotropy confined to the upper mantle, similar to its starting model, S362ANI.
|Authors:||Caio Ciardelli, Department of Geophysics, Institute of Astronomy, Geophysics, and Atmospheric Sciences – USP, São Paulo, Brazil
Marcelo Assumpção, Department of Geophysics, Institute of Astronomy, Geophysics, and Atmospheric Sciences – USP, São Paulo, Brazil
Ebru Bozdağ, Department of Geophysics, Colorado School of Mines, Golden, USA
Suzan Van der Lee, Department of Earth and Planetary Sciences, Northwestern University, Evanston, USA
|Author of parametrization:||Caio Ciardelli, Department of Geophysics, Institute of Astronomy, Geophysics, and Atmospheric Sciences – USP, São Paulo, Brazil|
|Model Download||SAAM23.r0.0-n4.nc (see metadata) in the Polar Stereographic Projection and in netCDF 4 Classic format.|
|Depth Coverage||Whole Mantle (10 to 1,500 km)|
|Area||South America (latitudes: -60°/16°, longitudes: -88°/-10°)|
|Data Set Description||112 earthquakes in the moment-magnitude range 5.8 ≤ Mw ≤ 7.0 and 1,311seismic stations, totalizing 20,884 unique ray paths. The events were chosen to provide broad geographical coverage, including shallow (depth ≤ 50 km), intermediate (50 km > depth > 300 km), and deep (depth ≥ 300 km) events. Because we used relatively long-period data (>17 s) and events with magnitudes less than 7, we chose a Centroid Moment-Tensor (CMT) pointsource earthquake representation. Initial CMT solutions were selected from the global CMT catalogue .|
To cite the original work behind this Earth model:
- Ciardelli, C., Assumpção, M., Bozdağ, E., & Van der Lee, S. (2022). Adjoint Waveform
Tomography of South America. Journal of Geophysical Research: Solid Earth, 127(2),
To cite the model parametrization effort:
*Ciardelli, C., Bozdağ, E., Peter, D., & Van der Lee, S. (2022). SphGLLTools: A toolbox for
visualization of large seismic model files based on 3D spectral-element meshes.
Computers & Geosciences, 159, 105007, https://doi.org/10.1016/j.cageo.2021.105007
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:
- G. P. Hayes, G. L. Moore, D. E. Portner, M. Hearne, H. Flamme, M. Furtney, G. M. Smoczyk, Slab2, a comprehensive subduction zone geometry model. Science 362, 58–61 (2018).
- r0.0 model provided by Caio Ciardelli.
revision r0.0: uploaded May 20, 2022.