Summary
ADAMA is a shear wave velocity model complemented with a taxonomic map of Africa. The model is derived from probabilistically constructed phase and group velocity measurements of ambient noise Rayleigh and Love waves. The taxonomy is a result of machine learning evaluation of the similarities of vertical velocity profiles across the continent.
Quicklinks
Description
| Name | ADAMA |
| Title | Africa’s crustal architecture inferred from probabilistic and perturbational inversion of ambient noise: ADAMA |
| Type | 3-D Tomography Earth Model and Taxonomy |
| Sub Type | Shear Wave Velocity (km/s) |
| Year | 2024 |
| Data Revision | r0.0 (revision history) |
| Short Description | ADAMA is a shear wave velocity model complemented with a taxonomic map of Africa. The model is derived from probabilistically constructed phase and group velocity measurements of ambient noise Rayleigh and Love waves. The taxonomy is a result of machine learning evaluation of the similarities of vertical velocity profiles across the continent. |
| Authors: | Tolulope Olugboji, Department of Earth and Environmental Sciences, Department of Electrical and Computer Engineering, and Georgen Institute of Data Sciences, University of Rochester, Rochester, NY, USA Siyu Xue, Department of Earth and Environmental Sciences, University of Rochester, Rochester, NY, USA Jean-Joel Legre, Department of Earth and Environmental Sciences, University of Rochester, Rochester, NY, USA Yuri Tamama, Department of Geosciences, Princeton University, Princeton, NJ, USA, Seismological Laboratory, California Institute of Technology, Pasadena, CA, USA |
| Reference Model | Our velocity model is constrained from perturbational inversion of our dispersion maps starting from the Litho 1.0 global velocity model. The global velocity model is updated using our dispersion maps, constructed with a Transdimensional Hierarchical Bayesian Inversion. |
| Prior Model | None |
| Model Download | ADAMA.r0.0.nc (see metadata) is the model in netCDF 3 Classic format. ADAMA_Dispersion_maps_and_statistics.r0.0.nc (see metadata) contains ADAMA dispersion maps and statistics in netCDF 3 Classic format. |
| Model Home Page | None |
| Depth Coverage | 0.5 to 42.5 km |
| Area | Africa (latitude: -34° to 40°, longitude: -23° to 57°) |
| Data Set Description | ADAMA is from the recently published catalog of continent-wide inter-station dispersion measurements provided by (Olugboji & Xue, 2022). This is a large catalog of Love and Rayleigh wave phase and group dispersion measurements. It represents the following advances: (a) it is a large distribution of short period dispersion measurements: ∼114,000 interstation pairs at periods between 5 and 40 s, (b) it includes uncertainties, and© it is extracted from cross-spectra of continuous recordings of ambient noise ground vibrations, collected over four decades, since the commencement of digital seismometry on the continent. |
Citations and DOIs
To cite the original work behind this Earth model:
- Olugboji, T. , Xue, S. , Legre, J.-J. , & Tamama, Y. (2024). Africa’s crustal architecture inferred from probabilistic and perturbational inversion of ambient noise: ADAMA. Geochemistry, Geophysics, Geosystems, 25, e2023GC011086. https://doi.org/
https://doi.org/10.1029/2023GC011086
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.2024.adama.1
References
- Olugboji, T., & Xue, S. (2022). A short-period surface-wave dispersion dataset for model assessment of Africa’s crust: ADAMA. Bulletin of the Seismological Society of America, 93(3), 1943–1959. https://doi.org/
https://doi.org/10.1785/0220210355
Credits
- r0.0 model provided by Jean-Joel Legre.
Revision History
revision r0.0: uploaded July 18, 2024.
Timeline
- 2024-07-22
- r0.0 online
