Brandon Schmandt



Assistant Professor

University of New Mexico

contact: bschmandt at

PhD, 2011 University of Oregon

Postdoc, 2011-12 Caltech Seismo Lab

Publications (*student, ^postdoc)


Schmandt, B., F.-C. Lin, K.E. Karlstrom (2015), Distinct crustal isostasy trends east and west of the Rocky Mountain Front. Geophysical Research Letters

^Hansen, S., & Schmandt, B. (2015). Automated Detection and Location of Microseismicity at Mount St. Helens with a Large‐N Geophone Array. Geophysical Research Letters.

^Hansen, S., K. Dueker, B. Schmandt (2015), Thermal classification of lithospheric discontinuities beneath USArray. Earth and Planetary Science Letters

*Cafferky, S., & Schmandt, B. (2015). Teleseismic P wave spectra from USArray and implications for upper mantle attenuation and scattering. Geochemistry, Geophysics, Geosystems.

Humphreys, E. D., Schmandt, B., Bezada, M. J., & Perry-Houts, J. (2015). Recent craton growth by slab stacking beneath Wyoming. Earth and Planetary Science Letters, 429, 170-180.

Becker, T. W., Lowry, A. R., Faccenna, C., Schmandt, B., Borsa, A., & Yu, C. (2015). Western US intermountain seismicity caused by changes in upper mantle flow. Nature, 524(7566), 458-461.

Ricketts, J. W., Kelley, S. A., Karlstrom, K. E., Schmandt, B., Donahue, M. S., & van Wijk, J. (2015). Synchronous opening of the Rio Grande rift along its entire length at 25–10 Ma supported by apatite (U-Th)/He and fission-track thermochronology, and evaluation of possible driving mechanisms. Geological Society of America Bulletin, B31223-1.

Huang, H. H., Lin, F. C., Schmandt, B., Farrell, J., Smith, R. B., & Tsai, V. C. (2015). The Yellowstone magmatic system from the mantle plume to the upper crust. Science, 348(6236), 773-776.


F-.C. Lin, B. Schmandt (2014), Upper crustal azimuthal anisotropy across the contiguous U.S. determined by Rayleigh wave ellipticity, Geophys. Res. Lett., DOI: 10.1002/2014GL061231.

Schmandt, B., F.-C. Lin (2014), P- and S-wave tomography of the mantle beneath the United States, Geophys. Res. Lett. DOI: 10.1002/2014GL061231

Lin, F.-C., V.C Tsai, B. Schmandt (2014), 3-D crustal structure of the western United States: application of Rayleigh-wave ellipticity extracted from noise correlations, Geophys. J. Int, doi: 10.1093/gji/ggu160

Schmandt, B., S.D. Jacobsen, T.W. Becker, Z. Liu, K.G. Dueker (2014), Dehydration melting at the top of the lower mantle, Science, 344 (6189), 1265-1268.

Crow, R., K.E. Karlstrom, A. Darling, L. Crossey, V. Polyak, D. Granger, Y. Asmerom, B. Schmandt (2014), Steady incision of Grand Canyon at the million year time frame: A case for mantle driven differential uplift, Earth Planet. Sci. Lett, 397, 159-173.

MacCarthy, J.K., R.C. Aster, K.G. Dueker, S. Hansen, B. Schmandt, K.E. Karlstrom (2014), Seismic tomography of the Colorado Rocky Mountains upper mantle from CREST: Lithosphere-asthenosphere interactions and mantle support of topography, Earth Planet. Sci. Lett., 402, 107-119.

Foster, K., K.G. Dueker, B. Schmandt, H. Yuan (2014), A sharp cratonic lithosphere-asthenosphere boundary beneath the American Midwest and its relation to mantle flow, Earth Planet. Sci. Lett., doi: 10.1016/j.epsl.2013.11.018.


Schmandt, B., R. Clayton (2013), Analysis of teleseismic P-waves with a 5200-station array in Long Beach, California: evidence for an abrupt boundary to Inner Borderland rifting, J. Geophys. Res., 118, doi:10.1002/jgrb.50370.

Schmandt, B., R. Aster, D Scherler, V.C. Tsai, K. Karlstrom (2013), Multiple fluvial processes detected by riverside seismic and infrasound monitoring of a controlled flood in the Grand Canyon, Geophys. Res. Lett., 40, doi:10.1002/grl.50953.

Wang, Y., D.W. Forsyth, C.J. Rau, N. Carriero, B. Schmandt, J. Gaherty, B. Savage (2013), Fossil slabs attached to unsubducted fragments of the Farallon plate, Proceddings of the National Academy of Sciences,

Lin, F.-C., V.C. Tsai, B. Schmandt, Z. Duputel, Z. Zhan, (2013) Extracting seismic core phases with array interferometry, 40, 1049-1053, DOI: 10.1002/grl.50237.


Schmandt, B. (2012) Mantle transition zone shear velocity gradients beneath USArray, Earth and Planetary Science Letters, 355-356, 119-130, doi: 10.1016/j.epsl.2012.08.031.

Lin, F.-C., B. Schmandt, and V. C. Tsai (2012), Joint inversion of Rayleigh wave phase velocity and ellipticity using USArray: Constraining velocity and density structure in the upper crust, Geophys. Res. Lett., 39, L12303, doi:10.1029/2012GL052196.

Schmandt, B., K. G. Dueker, E. D. Humphreys, S. H. Hansen (2012), Hot mantle upwelling across the 660 beneath Yellowstone. Earth and Planetary Science Letters, 331-332, 224-236, doi:10.1016/j.epsl.2012.03.025.

Chu, R., B. Schmandt, D. V. Helmberger (2012), Juan de Fuca subduction zone structure from tomography and waveform modeling, J. Geophys. Res., 117, B03304, doi:10.1029/2012JB009146.

Chu, R., B. Schmandt, D. V. Helmberger (2012), Upper mantle P-velocity structure beneath the midwestern United States derived from triplicated waveforms, Geochemistry Geophysics Geosystems, 13, Q0AK04, doi:10.1029/2011GC003818 .

Karlstrom, K. E., et al (2012), Mantle-driven dynamic uplift of the Rocky Mountains and Colorado Plateau and its surface response: Toward a unified hypothesis. Lithosphere, doi:10.1130/L150.1.


O’Driscoll, L., E. D. Humphreys, B. Schmandt, (2011), Time corrections to teleseismic P delays derived from SKS splitting parameters and implications for western U.S. P-wave tomography. Geophysical Research Letters, 38 L19304.

Humphreys, E. D., B. Schmandt (2011), Looking for mantle plumes. Physics Today, 64, 8, 34-39.

Schmandt, B., K.G. Dueker, S.M. Hansen, J.J. Jasbinsek, Z. Zhang (2011), A sporadic low-velocity layer atop the western U.S. mantle transition zone and short-wavelength variations in transition zone discontinuities. Geochemistry Geophysics Geosystems, doi:10.1029/2011GC003668.

Levander, A., B. Schmandt, M. S. Miller, K. Liu, K. E. Karlstrom, R. S. Crow, C.-T. A. Lee, and E. D. Humphreys (2011), Ongoing Colorado Plateau uplift by delamination-style convective lithospheric downwelling. Nature, 472, 461–465, doi:10.1038/nature10001.

Schmandt, B. and E. D. Humphreys (2011), Seismically Imaged Relict Slab from the 55 Ma Siletzia Accretion to Northwest USA. Geology, 39, 175-178.

Crow, R.S., K.E., Karlstrom, Y. Asmerom, B. Schmandt, V. Polyak, A. DuFrane (2011), Shrinking of the Colorado Plateau via lithospheric mantle erosion: evidence from Nd and Sr isotopes and geochronology of Neogene basalts. Geology, 39, 27-30.


Bezada, M. J., A. Levander, and B. Schmandt (2010) Subduction in the southern Caribbean: Images from finite-frequency P wave tomography. J. Geophys. Res., 115, B12333, doi:10.1029/2010JB007682.

Schmandt, B. and E. D. Humphreys (2010), Complex subduction and small-scale convection revealed by body wave tomography of the western U.S. upper mantle. Earth and Planetary Science Letters, 297, 435-445, doi:10.1016/j.epsl.2010.06.047.

Schmandt, B. and E. D. Humphreys (2010), Seismic heterogeneity and small-scale convection in the southern California upper mantle. Geochemistry Geophysics Geosystems. 11, Q05004, doi:10.1029/2010GC003042.

Mount St. Helens Geophone Array


Seismic & infrasound monitoring of a controlled flood in Grand Canyon