Geophysics
· A minor research areaEarth
Applying seismic-inversion techniques developed for the Sun to terrestrial geophysics — a secondary research area.
The mathematical methods that enable helioseismic discoveries — finite-frequency sensitivity kernels, Born approximations, adjoint inversion — translate directly to seismic tomography of Earth's mantle and core. Applying methods developed for stellar physics to the solid Earth opens productive cross-disciplinary conversations.
This is a minor research area for the group. The work focuses on normal-mode coupling for deep-Earth structure, noise cross-correlation theory, and renormalization-group approaches to the wave equation in heterogeneous media.
Related publications
See all in Earth →Homogenization of Elastic Wave Equation using Renormalization Group Theory
Bhaskar Illa, Ajay Malkoti, Shravan Hanasoge, Rene-Edouard Plessix et al.
EarthArXiv preprint (2025)
Upscaling acoustic wave equation using renormalization group theory
Ajay Malkoti, Shravan Hanasoge, René-Édouard Plessix
Geophysics, 87, T281 (2022)
Rayleigh-wave H/V ratio measurement from ambient noise cross-correlations and its sensitivity to VP: a numerical study
Ajay Malkoti, Arjun Datta, Shravan Hanasoge
Geophysical Journal International, 227, 472 (2021)
Finite frequency inversion of cross-correlation amplitudes for ambient noise source directivity estimation
Arjun Datta, Shravan Hanasoge, J. Goudswaard
Journal of Geophysical Research – Solid Earth (2019)
Discrete wave equation upscaling
Andreas Fichtner, Shravan Hanasoge
Geophysical Journal International, 209, 353 (2017)
Team members
- Bhaskar IllaPostdoctoral Researcher
- Justin AlvaDeveloper
For all peer-reviewed publications across the group, see the full publications page.
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