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

Kiser, E., Levander, A., Schmandt, B., and Hansen, S., 2019, Upper Crustal Structure and Magmatism in Southwest Washington: Vp, Vs, and Vp/Vs Results From the iMUSH Active‐Source Seismic Experiment, JGR Solid Earth, doi: 10.1029/2018JB016203.

Bishop, B.T., Beck, S.L., and Zandt G., 2019, Segmentation in continental forearcs: Links between large-scale overriding plate structure and seismogenic behavior associated with the 2010 Mw 8.8 Maule, Chile earthquake, Tectonophysics, 767, doi: 10.1016/j.tecto.2019.228164.

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.

In the Field

Dr. Eric Kiser and the GSAT group helped deploy ~90 nodal seismometers around Lassen Peak in July. Lassen Peak is the southernmost volcano of the Cascade volcanic arc. The group is interested in imaging the magmatic plumbing system of the region.