Summary
SAAM23 is an elastic model for South America with transverse isotropy confined to the upper mantle, similar to its starting model, S362ANI.
Quicklinks
Description
| Name | SAAM23 |
| Title | South American Adjoint Model—iteration 23 |
| Type | 3-D Tomography Earth Model |
| Sub Type | Anisotropic (in the uppermost mantle) |
| Year | 2022 |
| 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 |
| Starting Model | S362ANI |
| Reference Model | STW105 |
| Model Homepage | https://github.com/caiociardelli/saam23 |
| 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 . |
Citations and DOIs
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),
e2021JB022575, https://doi.org/10.1029/2021JB022575
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:
https://doi.org/10.17611/dp/emc.2022.saam23.1
References
- 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).
Credits
- r0.0 model provided by Caio Ciardelli.
Revision History
revision r0.0: uploaded May 20, 2022.
Timeline
- 2022-05-23
- online
