Welcome to the Global Seismology and Tectonics (GSAT) Group of the Geosciences Department at the University of Arizona. Our research focuses on understanding the structure and active tectonic processes associated with megathrusts, mountain building, subduction, and strike-slip boundaries using passive broadband seismology. Our current research is concentrated on the South America, the western US, Japan, and Turkey.

News and Updates


Haiyang Kehoe wins Best Geophysics Talk at the 2019 GeoDAZE student symposium!
Daniel Portner receives the Department of Geosciences award for Outstanding Graduate Student Scholarship!
Audrey Dunham is awarded as a 2019 Galileo Circle Scholar!

Latest Publications

Meltzer, A., Beck, S.L., Ruiz, M., Hoskins, M., Soto‐Cordero, L., Stachnik, J.C., Lynner, C., Porritt, R., Portner, D.E., Alvarado, A., Hernandez, S., Yepes, H., Charvis, P., Font, Y., Regnier, M., Agurto‐Detzel, H., Rietbrock, A., Leon‐Rios, S., and Mercerat, E.D., 2019, The 2016 Mw 7.8 Pedernales, Ecuador, Earthquake: Rapid Response Deployment, Seismological Research Letters, , doi: 10.1785/0220180364.

Kehoe, H.L., Kiser, E., and Okubo P.G., 2019, The rupture process of the 2018 Mw 6.9 Hawaiʻi earthquake as imaged by a genetic algorithm‐based back‐projection technique, Geophysical Research Letters, 46, doi: 10.1029/2018GL080397.

Bar, N., Long, M.D., Wagner, L.S., Beck, S.L., Zandt, G. and Tavera, H., 2019, Receiver function analysis reveals layered anisotropy in the crust and upper mantle beneath southern Peru and northern Bolivia, Tectonophysics, 753, 93-110, doi:10.1016/j.tecto.2019.01.007.

In the Field

Graduate students, Audrey Dunham and Haiyang Kehoe, helped to deploy more than 1000 nodal seismometers for a reflection survey in Bakersfield, CA in early February of this year. They were assissting members of the Reflection Seismology Group who are interested in assessing the growth and seismic hazard of the White Wolf Fault. The White Wolf Fault generated the largest blind thrust fault in Southern California History (1952 Mw 7.3 Kern County).