Broadly defined, I am interested in using passive source seismic techniques to image the structure of the crust and upper mantle of the Earth. My research goals can be summarized by the question “How are tectonic events manifested in the character of the lithosphere?”.

I work on developing new approaches to obtain tomographic models that better image subsurface structure, primarily using receiver functions and surface wave dispersion data. I have applied these imaging techniques to a variety of locations to understand problems pertaining to: 1) the role of fluids in subduction zone processes, 2) the character of lithospheric-scale magmatic systems, 3) the processes related to the terminal stages of subduction in the Tethyan system, and 4) the longevity and relative stability of cratonic crust.

I am an assistant professor in Purdue University‘s Department of Earth, Atmospheric, and Planetary Sciences alongside fellow seismologist Xiaotao Yang. We are both looking for motivated graduate students to help us build on the already strong reputation for seismic imaging and tectonics at Purdue. Don’t hesitate to contact me if interested.

2 new publications

For the technique-focused seismologist:
Delph, J.R., Levander, A., and Niu, F., 2019, “Constraining crustal properties using receiver functions and the autocorrelation of earthquake-generated body waves”, Journal of Geophysical Research, doi:10.1029/2019JB0127929

For the tectonicist:
Delph, J.R., Thomas, A.M., and Levander, A., 2021, “Subcretionary Tectonics: Linking Variability in the Expression of Subduction along the Cascadia Forearc”, Earth and Planetary Science Letters, doi:10.1016/j.epsl.2020.116724