Active Tectonics and Geodesy
William Barnhart, Assistant Professor
The University of Iowa

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In Review

Viscous accretionary prisms: viscoelastic relaxation of the Makran accretionary prism following the 2013 Baluchistan, Pakistan earthquake, K.E. Peterson, W.D. Barnhart, S. Li


Spatiotemporal variations of mantle viscosity and the presence of cratonic mantle inferred from eight years of postseisic deformation following the 2010 Maule Chile earthquake, S. Li, J. Bedford, M. Moreno, WD Barnhart, M. Rosenau, O. Oncken


InSAR constraints on induced earthquakes and liquefaction in Oklahoma, USA. W.D. Barnhart, W.L. Yeck, D.E. McNamara


Ramp-flat structures of the Zagros Mountains inferred from co-seismic slip and afterslip of the 2017 Mw7.3 Darbandikhan, Iran/Iraq earthquake. WD Barnhart, CMJ Brengman, S Li, KE Peterson



An investigation of the accuracy of Coulomb stress changes inferred from geodetic observations following subduction zone earthquakes. B.J. Stressler, W.D. Barnhart, Journal of Geophysical Research.


Tectonic summaries of magnitude 7 and greater earthquakes from 2000 to 2015. Hayes, G.P., Myers, E.K., Dewey, J.W., Briggs, R.W., Earle, P.S., Benz, H.M., Smoczyk, G.M., Flamme, H.E., Barnhart, W.D., Gold, R.D., and Furlong, K.P., USGS Open File Report 2016-1192, 148,


Introduction to this special section: Remote Sensing, CW Beasley, WD Barnhart, The Leading Edge, v 36 (1), p 11.


The 2008 Wells, Nevada Earthquake Sequence: Source Constraints using Calibrated Multiple Event Relocation and InSAR, J Nealy, GP Hayes, HM Benz, WD Barnhart, Bulletin of the Seismological Society of America, v 107 (3)


Fault creep rates of the Chaman Fault (Pakistan and Afghanistan) inferred from InSAR, WD Barnhart, Journal of Geophysical Research, doi:10.1002/2016JB013656, v122 (1)


Oklahoma experiences largest earthquake despite wastewater injection hazard mitigation efforts; WL Yeck, GP Hayes, DE McNamara, JL Rubinstein, WD Barnhart, PS Earle, H Benz, Geophysical Research Letters, v44 (2)


Integrated geophysical characteristics of the 2015 Illapel, Chile, earthquake; MW Herman, JL Nealy, WL Yeck, WD Barnhart, GP Hayes, KP Furlong, HM Benz, Journal of Geophysical Research Solid Earth, v 122 (7)



Co-seismic slip and early afterslip of the 2015 Illapel, Chile earthquake: Implciations for frictional heterogeneities on the megathrust and  coastal uplift, WD Barnhart, JR Murray, RW Briggs, F Gomez, CPJ Miles, J Svarc, S Riquelme, BJ Stressler, JGR-Solid Earth, doi: 10.1002/2016JB013124


Source Modeling of the 2015 Mw7.8 Nepal (Gorkha) earthquake sequence: implication for geodynamics and earthquake hazards, DE McNamara, W Yeck, WD Barnhart, V Schulte-Pelkum, E Bergman, H Benz, Tectonophysics, doi: 10.1016/j.tecto.2016.08.004





Rapid characterization of the 2015 Mw 7.8 Nepal (Gorkha) earthquake sequence and its seismotectonic context, Hayes, GP, Briggs RW, Barnhart WD, Yeck W., McNamara DE., Wald DJ, Nealy J, Benz H, Gold RD, Jaiswal K, Marano K, Earle P, Hearne M, Smoczyk G, Wald L, Samsonov S, Seismological Research Letters, v86 (6), 1557-1567. doi:10.1785/0220150145.


On- and off-fault deformation associated with the September 2013 Mw7.7 Balochistan earthquake: Implications for geologic slip rate measurements, Gold, RD, NG Reitman, RW Briggs, WD Barnhart, GP Hayes, E Wilson, Tectonophysics, in press


Evidence for Slip Partitioning and Bimodal Slip on a Single Fault: Surface slip characteristics of the 2013 Mw7.7 Balochistan earthquake, Barnhart, W.D., R.W. Briggs, N.G. Reitman, R.D. Gold, G.P. Hayes, accepted, Earth and Planetary Science Letters, v. 420, p 1-11, doi:10.1016/j.epsl.2015.03.027.


                  Full displacement field from Figure 2 can be downloaded here


Geodetic constraints on the August 2014 South Napa, CA earthquake, Barnhart,W.D., J.R. Murray, S-H Yun, J.L. Svarc, S.V. Samsonov, E.J. Fielding, B.A. Brooks, P. Milillo, Seismological Research Letters


The M6.0 24 August 2014 South Napa Earthquake, Seism. Res. Lett.,Brocher, T.M., A. S. Baltay, J. L. Hardebeck, F. F. Pollitz, J. R. Murray, A. L. Llenos, D. P. Schwartz, J. L. Blair, D. J. Ponti, J. J. Lienkaemper, V. E. Langenheim, T. E. Dawson, K. W. Hudnut, D. R. Shelly, D. Dreger, J. Boatwright, B. T. Aagaard, D. J. Wald, R. M. Allen, W. D. Barnhart, K. L. Knudsen, B. A. Brooks, and K. M. Scharer, Seismological Research Letters


Where it All Began: Induced Seismicity and Colorado., W.D. Barnhart, Outcrop, v64(4), 28-38.

                    Online version:




Seismological and geodetic constraints on the 2011 Trinidad, Colorado earthquake and deformation in the Raton Basin, Barnhart, W.D. H Benz, G Hayes, J. Rubinstein, E. Bergman, Journal of Geophysical Research, DOI: 10.1002/2014JB011227


Ball-and-socket tectonic rotations during the 2013 Mw7.7 Balochistan earthquake, Barnhart, W.D., G Hayes, R Briggs, R Gold, R Bilham, Earth and Planetary Science Letters, DOI: 10.1016/j.epsl.2014.07.001


Continuing Megathrust Earthquake Potential in Northern Chile after the 2014 Iquique Earthquake Sequence,

Hayes, G.P., Herman, M.W., Barnhart, W.D., K.P. Furlong, S. Riquelme, H. Benz, E. Bergman, S. Barrientos, P.S. Earle, S. Samsonov, Nature, doi:10.1038/nature13677


Breaking the oceanic lithosphere in subduction zones: The 2013 Khash, Iran earthquake, Barnhart, W.D., Hayes, G.P., Samsonov, S.V., Fielding, E.J., Seidman, L.E., Geophysical Research Letters, doi:10.1002/2013GL058096


                    Makran Slab Model (mak_slab1.0_clip.grd,


Little late Holocene strain accumulation and release on the Aleutian megathrust below the Shumagin Islands, Alaska, Witter, R.C., Briggs, R.W., Engelhart, S.E., Gelfenbaum, G., Koehler, R.D., Barnhart, W.D.,Geophysical Research Letters, DOI: 10.1002/2014GL059393


Landslides in the northern Colorado Front Range caused by rainfall, September 11–13, 2013. Godt, J.W., Coe, J.A., Kean, J.W., Baum, R.L., Jones, E.S., Harp, E.L., Staley, D.M., and Barnhart, W.D., U.S. Geological Survey Fact Sheet 2013–3114. or


Seismicity of the Earth 1900-2013: East African Rift. GP Hayes, ES Jones, TJ Stadler, WD Barnhart, DE McNamara, HM Benz, KP Furlong, A Villasenor, US Geological Survey:





Phantom earthquakes and triggered aseismic creep: Vertical partitioning of strain during earthquake sequences in Iran;  Barnhart, W.D., Lohman, R.B. Geophysical Research Letters, doi:10.1002/grl.50201


Characterizing and Estimating Noise in InSAR and InSAR Time Series with MODIS, Barnhart, W.D., Lohman, R.B.,Geochemistry, Geophysics, Geosystems, doi:10.1002/ggge.20258


Active Accommodation of Plate Convergence in Southern Iran: Earthquake Locations, Triggered Aseismic Slip, and Regional Strain Rates, Barnhart, W.D., Lohman, R.B., Mellors, R.J., Journal of Geophysical Research, doi:10.1002/jgrb.50380





Regional trends in active diapirism revealed by mountain range-scale InSAR time series; Barnhart, W.D., Lohman, R.B.,   Geophysical Research Letters: doi:10.1029/2012GL051255


Depths and focal mechanisms of crustal earthquakes in the central Andes determined from teleseismic waveform analysis and InSAR, Devlin, S., B.L. Isacks, M.E. Pritchard, W.D. Barnhart, R.B. Lohman, Tectonics: doi:10.1029/2011TC002914




InSAR and optical constraints on fault slip during the 2010-2011 New Zealand earthquake sequence, Barnhart, W.D., M.J. Willis, R.B. Lohman, A.K. Melkonian, Seismological Research Letters, doi:10.1785/gssrl.82.6.815





Automated fault model discretization for inversions for coseismic slip distributions, Barnhart, W.D., Lohman, R.B.,  Journal of Geophysical Research, doi:10.1029/2010JB007545


Evaluation of earthquake triggering during the 2005-2008 earthquake sequence on Qeshm Island, Iran, Lohman, R.B., W.D. Barnhart,  Journal of Geophysical Research, doi:10.1029/2010JB007710