S-Team
The S-team, under the direction of Dr. Roel Snieder, develops new techniques to use wavefield measurements for imaging, in particular for detecting time-dependent changes in the subsurface. Research areas include imaging using background noise as a source, imaging in unknown media, and time-dependent material properties. The team has an interdisciplinary approach in the methods that is uses, and applies these methods to a variety of applications that range from seismic imaging to monitoring dams.
Methods We Love
Marchenko Imaging
A method used to improve imaging of the Earth’s subsurface.
Seismic Interferometry
A method to cancel near-subsurface noise in seismic data.
Super Resolution
A method used to generate high resolution images from low resolution ones.
Time-lapse changes
The Problems We Solve
How can we retrieve body waves between two sources?
How do we monitor a dam’s structural integrity?
How can we improve spatio-temporal focusing in time-reversal experiments?
Selected Recent Publications
- Saengduean, P., M. Moschetti, and R. Snieder, 2021, Inter-source interferometry of seismic body waves: Required conditions and examples, Pure Appl. Geophys., 178, 3441-3460, https://link.springer.com/article/10.1007/s00024-021-02814-y#appendices
- Jaimes, Manuel A., R. Snieder, 2021, Spatio-temporal resolution improvement via weighted time-reversal: Wave Motion, 106, 102803, ISSN 0165-2125, https://doi.org/10.1016/j.wavemoti.2021.102803.
- Kiraz, M. R. Snieder, and K. Wapenaar, 2021, Focusing waves in an unknown medium without wavefield decomposition: JASA Express Letters, 1, no. 5, 055602-1—055602-6, https://doi.org/10.1121/10.0004962.
- Jing, J., R. Snieder, and N. Nakata, 2020, Extracting the response of the Bay Bridge, California, from the application of multichannel deconvolution to earthquake-induced shaking: Bull. Seismol. Soc. Am., 110, 556-564. (download pdf)
- Jia, X., A. Guitton, and R. Snieder, 2018, A practical implementation of subsalt Marchenko imaging with a Gulf of Mexico data set: Geophysics, 83, S409-S419. (download pdf)
- Planes, T., M.A. Mooney, J.B.R. Rittgers, M.L. Parekh, M. Behm, and R. Snieder, R., 2016, Time-lapse monitoring of internal erosion in earthen dams and levees using ambient seismic noise: Geotechnique, 66, 301-312. (download pdf)
Meet the Team
“The Marchenko method has always caught my attention and it feels wonderful to be able to work at its focal point.”
“No receiver, no information! The most common sense in our community. Be ready because inter-source interferometry and compressive sensing will blow your minds from this common logic.”
“Success is when simplicity of concepts, beauty of mathematics, and application to data come together to help solve problems that are of social or environmental importance. In the process we educate the next generation of researchers.”
“Tailings dams are almost as large as the risk they pose.”
“Geophysics caught my attention from a very young age because it is the perfect mix of geology, physics, mathematics and computational science. In this field, theory and application go together, which makes research more fun.”
Join the S-Team
Mention CWP and the S-Team in your application’s statement of interest for consideration.