I hold appointments at the University of Michigan as Professor of Geophysics. I teach Introduction to Geology at the Camp Davis Field Station and Geophysics on campus. My research involves planetary-scale seismology and geophysics with a focus on seismic imaging of Earth’s mantle, the interpretation of ground-motion recordings curated by IRIS, and the computation of seismic wave fields using open-source tools developed by colleagues around the world. Current research topics include seismic tomography, reflection seismology of the transition zone, wave attenuation, and earthquake rupture analysis.
recent publications
Ritsema, J., Lekic V., Heterogeneity of seismic wave velocity in Earth’s mantle, Annu. Rev. Earth Planet. Sci., 48, 15.1-15.25, doi:10.1146/annurev-earth-082119-065909, 2020.
Ritsema., J., Kaneshima, S., Haugland, S. M., The dimensions of scatterers in the lower mantle using USArray recordings of S-wave to P-wave conversions, Phys. Earth Planet. Int., 306, 10.1016/j.pepi.2020.106541, 2020.
Jones, T. D., Maguire, R. R., van Keken, P. E., Ritsema, J., Koelemeijer, P., Subducted oceanic crust as the origin of seismically slow lower-mantle structures, Progr. Earth Planet. Sci., 7, 1–16, 2020.
Liu, M., Huang, Y., Ritsema, J., Stress drop variation of deep-focus earthquakes based on empirical Green’s functions, Geophys. Res., Lett., 47, doi.org/10.1029/2019GL086055, 2020.
Ritsema., J., Kaneshima, S., Haugland, S. M., The dimensions of scatterers in the lower mantle using USArray recordings of S-wave to P-wave conversions, Phys. Earth Planet. Int., 306, 10.1016/j.pepi.2020.106541, 2020.
