Seismology and Geodynamics. My group studies the structure of the earth’s interior, from crust to core. We want to understand its heat and material flows, which move slowly on a human timescale, but vigorously on geological time scales. These flows drive the motions of tectonic plates, formation of oceans, volcanism, and continental tectonics — surface observables that we link to 3-D images of mantle structure at depth.
Our primary tool is seismic tomography, an imaging technique that computes three-dimensional models of the earth’s interior. Essentially, it maps out the anomalously hot, cold, or dense regions that drive convection in the mantle. We specialize in cutting-edge methods for waveform inversion. PhD projects would typically advance the techniques of seismic tomography, and/or apply these tools to new, rapidly growing data sets. We also do field experiments that contribute to global data acquisition networks of the seismological community, including novel recordings on the ocean bottom.
Linking our findings to neighbouring fields (plate reconstructions, field geology, geodynamic modelling) is the ultimate challenge and a source of great intellectual excitement.
- Geophysical Methods (in 2nd year, with Conall MacNiocaill)
- Seismology (in 3rd year, with Tarje Nissen-Meyer)
- Solid Earth seminar (in 4th year, with Richard Katz, Lars Hansen, and Tarje Nissen-Meyer)
- Module in the NERC Doctoral Training Programme (“Solid Earth — Linking the brittle shell to the viscous mantle”)
View Selected Publications
- Sigloch, K., Mihalynuk, M.G., 2013. Intra-oceanic subduction shaped the assembly of Cordilleran North America. Nature 496, 50-56.
- Barruol, G., Sigloch, K., 2013. Investigating La Reunion hotspot from crust to core, Eos, Transactions American Geophysical Union, 94(23), 205-207, doi:10.1002/2013EO230002.
- Stähler, S.C., Sigloch, K., 2013. Fully probabilistic seismic source inversion – Part 1: Efficient parameterisation, Solid Earth, 5, 1125-1162, doi:10.5194/sed-5-1125-2013.
- Zhang, R., Czado, C., Sigloch, K., 2013. A Bayesian linear model for the high-dimensional inverse problem of seismic tomography, Annals of Applied Statistics, 7(2), 1111-11138, doi:10.1214/12-AOAS623.
- Pavlis, G.L., Sigloch, K., Burdick, S., Fouch, M.J., Vernon, F.L., 2012. Unraveling the Geometry of the Farallon Plate: Synthesis of Three-Dimensional Imaging Results from USArray, Tectonophysics, doi:10.1016/j.tecto.2012.02.008.
- Stähler, S.C., Sigloch, K., Nissen-Meyer, T., 2012. Triplicated P-wave measurements for waveform tomography of the mantle transition zone, Solid Earth, doi:10.5194/se-3-339-2012.
- Sigloch, K., 2011. Mantle provinces under North America from multifrequency P wave tomography. Geochemistry, Geophysics, Geosystems 12.
- Sigloch, K., McQuarrie, N., Nolet, G., 2008. Two-stage subduction history under North America inferred from multiple-frequency tomography. Nature Geoscience 1, 458-462.
- Tian, Y., Sigloch, K., Nolet, G., 2009. Multiple-frequency SH-wave tomography of the western US upper mantle. Geophysical Journal International 178, 1384-1402.
- Sigloch, K., Nolet, G., 2006. Measuring finite-frequency body wave amplitudes and traveltimes, Geophysical Journal International, 167(1), 271-287, doi:10.1111/j.1365-246X.2006.03116.x.