New Developments in Seismic Absorption and Scattering Tomography: from Rocks, to Faults, to Volcanoes
Abstract
Seismic scattering and absorption are rapidly becoming state of the art attributes for imaging the Earth. In the last decade, the development of sensitivity kernels modelling the spatial sensitivity of coda waves has given new, important insight for bench-marking these techniques - also known as"coda-attenuation tomography" - as state-of-the-art imaging tools. Here, I propose the last development of a tomographic framework for coda-wave imaging, whose core has been developed in volcanic areas, but is now finding his way into imaging fracture networks from fault areas to rock samples. The framework, known as the Multi-Resolution Attenuation Tomography Analysis (MuRAT) grounds on the use of Monte-Carlo simulations to solve radiative transfer equations numerically. It can include the effect of diffusive boundary conditions, from those produced in a volcano by an extended rim to those caused by connected fracture networks at fault and rock scales. The numerous example proposed in volcanic areas are complemented at field scale by the recent application to fluid-filled seismic networks in areas of slow deformation. The technique is validated by application to slow deformation experiments, with maps of seismic scattering in Darley Sandstone obtained from the produced Acoustic Emissions.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.S43B..08D
- Keywords:
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- 0545 Modeling;
- COMPUTATIONAL GEOPHYSICS;
- 7260 Theory;
- SEISMOLOGY;
- 7270 Tomography;
- SEISMOLOGY;
- 7290 Computational seismology;
- SEISMOLOGY