Subsurface cavity imaging
Seismology allows for a none intrusive way of studying the subsurface architecture of both man-made and natural subterranean features. One focus of my research is applying reflection and refraction seismology to image underground cavities.
Seismic reflection image of an underground void (Onyango et al., BSSA, 2020)
Subduction zone plate interface structure
Subduction zones are home to the largest instrumentally recorded earthquakes worldwide. An area of my research is imaging subducting plates and understanding how the plate interface structure influences seismicity, magmatism, and other subduction zone processes.
~1.2 and ~2.4 Hz receiver functions calculated from a spatially dense nodal geophone array on Kodiak Island (Onyango et al., GRL, 2022)