Paul Allan Johnson
Geophysicist and Artist

Below is a limited list of recent publications that illustrate my primary interests. (A full list of publications by our group can be found on our topical publications page when that page has been recreated. (Feb, 2023)

Wang, Kun, Johnson, Christopher, Bennett, Kane, Johnson, Paul, and USDOE Office of Science. labquake_future_prediction. Computer software. USDOE Office of Science (SC). 15 Sep. 2022. Web.

Euser, B, Christopher W Johnson, Robert Guyer, Esteban Rougier, Carly Michelle Donahue, George Guthrie, Antonio Munjiza, Paul A Johnson. (2022/4/2) Straining to Learn Permeability, EarthArXiv (Preprint).

Corradini M, I W McBrearty, D T Trugman, C Satriano, P A Johnson, P Bernard, Investigating the influence of earthquake source complexity on back-projection images using convolutional neural networks, Geophysical Journal International, Volume 229, Issue 3, June 2022, Pages 1824–1839.

Wang, K., Johnson, C. W., Bennett, K. C., & Johnson, P. A. (2022). Predicting future laboratory fault friction through deep learning transformer models. Geophysical Research Letters, 49, e2022GL098233.

Wang, K., Johnson, C.W., Bennett, K.C. et al. (2021) Predicting fault slip via transfer learning. Nat Commun 12, 7319.

Gao, K., R. A. Guyer, E. Rougier, and P. A. Johnson, Plate motion in sheared granular fault system, Earth and Planetary Science Letters 548, 2020, 116481, ISSN 0012-821X.

Ren, C., C. Hulbert, B. Rouet-LeDuc and P. A. Johnson, Machine learning and fault rupture: a review,

Poli, P., Marguin, V., Wang, Q., D'Agostino, N., & Johnson, P. ( 2020). Seasonal and co-seismic velocity variation in the region of L'Aquila from single station measurements and implications for crustal rheology. Journal of Geophysical Research: Solid Earth, 125, e2019JB019316.

Trugman, D., Z. Ross and P. A. Johnson, Imaging Stress and Faulting Complexity Through Earthquake Waveform Similarity. Geophys. Res. Lett. 10.1029/2019GL085888 (2020).

Rouet-Leduc, B., Hulbert, C., McBrearty, I. W., & Johnson, P. A. ( 2020). Probing slow earthquakes with deep learning. Geophysical Research Letters, 47, e2019GL085870.

Jin, J., P. Johnson & P. Shokouhi. (2019). An Integrated Analytical and Experimental Study of Contact Acoustic Nonlinearity at Rough Interfaces of Fatigue Cracks. Journal of the Mechanics and Physics of Solids. 135. 103769. 10.1016/j.jmps.2019.103769.

Gao, Ke, Robert Guyer, Esteban Rougier, Christopher X Ren, Paul A Johnson, From Stress chains to acoustic emission, Phys. Rev. Lett. 123 (2019).

Jasperson, H., C. Bolton, P. A. Johnson, C. Marone, M. V. de Hoop, Unsupervised classification of acoustic emissions from catalogs and fault time-to-failure prediction, arXiv (2019).

Trugman, D.T., G. C. Beroza, P. A. Johnson, Machine Learning in Geoscience: Riding a Wave of Progress, EOS, Transactions American Geophysical Union 100 (2019) (LA-UR-19-22852).

McBrearty, I. W., J. Gomberg, A. A. Delorey, P. A. Johnson (2019), Earthquake Arrival Association with Backprojection and Graph Theory, Bulletin of the Seismological Society of America (2019).

McBrearty, I. W., Andrew A Delorey, Paul A Johnson, Pairwise Association of Seismic Arrivals with Convolutional Neural Networks, Seism. Res. Lett. 90 (2A): 503-509.

Gao, K. E. Rougier, R.A. Guyer, Z. Lei, P. A. Johnson, Simulation of crack induced nonlinear elasticity using the combined finite-discrete element method, Ultrasonics, Volume 98, 2019, 51-61,ISSN 0041-624X.

Ren, Christopher & Dorostkar, Omid & Rouet-Leduc, Bertrand & Hulbert, C & Strebel, Dominik & Guyer, Robert. A. Johnson, P, & Carmeliet, Jan. (2019). Machine Learning Reveals the State of Intermittent Frictional Dynamics in a Sheared Granular Fault. Geophysical Research Letters. 10.1029/2019GL082706.

Yuan, B., Yen Joe Tan, Maruti K Mudunuru, Omar E Marcillo, Andrew A Delorey, Peter M Roberts, Jeremy D Webster, Christine NL Gammans, Satish Karra, George D Guthrie, Paul A Johnson, Using Machine Learning to Discern Eruption in Noisy Environments: A Case Study Using Driven Cold-Water Geyser in Chimayó, New Mexico, Seism. Res. Lett. 90, 591-603 (2019).

Bergen, K., P. A. Johnson, M. de Hoop and G. Beroza, Machine learning for data-driven discovery in solid Earth geoscience, Science, 363, 1-10 (2019).

Ostrovsky, L & Lebedev, A & Riviere, Jacques & Shokouhi, Parisa & Wu, C & Stuber Geesey, M.A. & Johnson, P.A. (2019) Long-Time Relaxation Induced by Dynamic Forcing in Geomaterials. Journal of Geophysical Research: Solid Earth. 10.1029/2018JB017076.

Bolton, C., David & Shokouhi, Parisa & Rouet-Leduc, Bertrand & Hulbert, Claudia & Riviere, Jacques & Marone, Chris & A. Johnson, Paul. (2019). Characterizing Acoustic Signals and Searching for Precursors during the Laboratory Seismic Cycle Using Unsupervised Machine Learning. Seismological Research Letters. 90. 10.1785/0220180367.

Astorga, A., P. Guguen, J. Riviere, T. Kashima and P. Johnson, Recovery of the resonance frequency of buildings following strong seismic deformation as a proxy for structural health, Structural Health Monitoring 1-16 (2018).

Yuan, B., Y. J. Tan, M. K. Mudunuru, O. E. Marcill, A. A. Delorey, P. M. Roberts, J. D. Webster, C. N. L. Gammans, S. Karra, G. D. Guthrie, and P. A. Johnson, Using Machine Learning to Discern Eruption in Noisy Environments: A Case Study Using CO2-Driven Cold-Water Geyser in Chimayó, New Mexico, Seism. Res. Lett 90 (2A), 563-572 .21(2019).

Rouet-LeDuc, B., C. Hulbert, P. A. Johnson, Continuous chatter of the Cascadia subduction zone revealed by machine learning. Nature Geoscience 12, 75-C79 (2019).

Hulbert, C., Rouet-LeDuc, B., C. X. Ren, J. Riviere, D. C. Bolton, C. Marone, P. A. Johnson, Similarity of fast and slow earthquakes illuminated by machine learning, Nature Geoscience12, 69-C74 (2019).

Lubbers, N.E., D.C. Bolton, J. Mohd Yusof, C. Marone, K.M. Barros, and P.A. Johnson. (2018), Earthquake catalog-based machine learning identification of laboratory fault states and the effects of magnitude of completeness, Geophys. Res. Lett., 45.

Gao, K., Euser, B. J., Rougier, E., Guyer, R. A., Lei, Z., Knight, E. E., et al. (2018). Modeling of stick slip behavior in sheared granular fault gouge using the combined finiteฉ discrete element method. Journal of Geophysical Research: Solid Earth, 123, 5774-C5792.

Dorostkar, O., R. A. Guyer, P. A. Johnson, C. Marone and J. Carmeliet, Cohesion-induced stabilization in stick-slip dynamics of weakly wet, sheared granular fault gouge" Geophys. Res. Lett. 123, 2115-2126 (2018).

Wu, Yue & Lin, Youzuo & Zhou, Zheng & Chas Bolton, David & Liu, Ji & Johnson, Paul. (2018). DeepDetect: A Cascaded Region-Based Densely Connected Network for Seismic Event Detection. IEEE Transactions on Geoscience and Remote Sensing. PP. 1-14. 10.1109/TGRS.2018.2852302. (39 citations).

Rouet-LeDuc, B., C. Hulbert, D. C. Bolton, C. X. Ren, J. Riviere, C. Marone, R. A. Guyer, P. A. Johnson, Estimating Fault Friction from Seismic Signals, Geophys. Res. Lett 45, 1321-1329, (2018).

Lemrich, L., J. Carmeliet, P. A. Johnson, R. Guyer, and X. Jia, Dynamic induced softening in frictional granular material investigated by DEM simulation, Phys. Rev. E 96, 062901 (2017).

Shreedharan, S., Riviere, J., Bolton, C., Zheng, L., Johnson, P.A. and Marone, C. Characterization of Acoustic Emissions from Laboratory Stick-Slip events in Simulated Fault Gouge, proceedings of the American Rock Mechanics Association conference ARMA 17-32 (2017) 51st U.S. Rock Mechanics/Geomechanics Symposium, 25-28 June, San Francisco, California, USA.

Shohouki, P., J. Riviere, R. Guyer and P. Johnson, Slow Dynamics of Consolidated Granular Systems: Multi-scale Relaxation, App. Phys. Lett. Vol.111, Issue 25 (2017).31.

Riviere, J., Z. Lv, P.A. Johnson, C. Marone, Temporal evolution of b-value along the seismic cycle: insights from laboratory experiments in glass beads, EPSL 482 407-413 (2018).

Lieou, C. K. C., E. G. Daub, R.A. Guyer and P. A. Johnson, Slow dynamics and strength recovery in unconsolidated granular earth materials: a mechanistic theory, J. Geophys. Res., 2017.

Lieou, C. K. C., E. G. Daub, R.A. Guyer and P. A. Johnson, Nonlinear softening of unconsolidated granular earth materials: a first-principles approach, J. Geophys. Res., 2017.

Rouet-LeDuc, B., C. Hulbert , N. Lubbers , K. Barros, and P. Johnson, Learning the Physics of Failure, Geophys. Res. Lett., 2017.

Lieou, C. K. C., E. G. Daub, R. A. Guyer, R. E. Ecke, C. Marone, and P. A. Johnson (2017), Simulating stick-slip failure in a sheared granular layer using a physics-based constitutive model, J. Geophys. Res. Solid Earth, 122, 295-C307.

Dorostkar, O., R. A. Guyer, P. A. Johnson, C. Marone, and J. Carmeliet, On the micromechanics of slip events in sheared, fluid-saturated fault gouge, Geophys. Res. Lett., 44, (2017).

Dorostkar, O., R. A. Guyer, P. A. Johnson, C. Marone and J. Carmeliet (2017), On the role of fluids in stick-slip dynamics of saturated granular fault gouge using a coupled computational fluid dynamics-discrete element approach., J. Geophys. Res. Solid Earth, 122, 3689-C3700.

Delorey, A., N. van der Elst and P. Johnson, Tidal Triggering of Earthquakes in the Vicinity of the San Andreas Fault, EPSL 460, 164-C170, 2017.

Riviere, J., L. Pimienta, M. Scuderi, T. Candela, P. Shokouhi, J. Fortin, A. Schubnel, C. Marone, and P. A. Johnson, “Frequency Dependence of Nonlinear Elasticity in Berea Sandstone,” Geophys. Res. Lett. 43, 3226-3236 (2016).

Guéguen, P, P. Johnson and P. Roux, “Nonlinear dynamics induced in a structure by seismic and atmospheric loading,” J. Acoust.Soc. Am. 582-590 140 (2016).

Wu, C., A. Delorey, F. Brengieur, C. Hadziioannou, E. Daub and P. Johnson, “Constraining depth range of S-wave velocity decrease after large earthquakes near Parkfield, California,” Geophysical Research Letters 43, 6129-6136, (2016).

Van der Elst, N., A. Delorey, D. Shelly and P. Johnson “Fortnightly modulation of San Andreas tremor and low-frequency earthquakes“, PNAS, 2016.

Johnson, P. A., J. Carmeliet, H. M. Savage, M. Scuderi, B. M. Carpenter, R. A. Guyer, E. G. Daub, and C. Marone, Dynamically triggered slip leading to sustained fault gouge weakening under laboratory shear conditions, Geophysical Research Letters 43, 1559-1565 (2016).

Ohara, Y., B. Anderson, T. J. Ulrich, P.-Y. Le Bas, P. Johnson, and S. Haupert, Localization of Closed Cracks Using Multi-Mode Nonlinear Resonant Ultrasound Spectroscopy,” Journal of JSNDI (The Japanese Society for Non-Destructive Inspection [Hihaki Kensa]) 64 (12), 571-578 (2015). (PDF)

Ferdowsi, B., M. Griffa, R. Guyer, P. Johnson, C. Marone and J. Carmeliet, “Acoustically-induced slip in sheared granular layers: application to dynamic earthquake triggering,” Geophysical Research Letters, 42 (2015).

Scuderi, M., B. Carpenter, P. Johnson, and C. Marone, “Poromechanics of stick-slip frictional sliding and strength recovery on tectonic faults“, Journal of Geophysical Research 120, (2015).

Delorey, A. A. K. Chao, K. Obara, P. A. Johnson, “Cascading elastic perturbation in Japan due to the 2012 Mw 8.6 Indian Ocean earthquake”, Sci. Adv. 1, e1500468. (2015).

Daub, E., D. Trugman, and P. Johnson, “Statistical tests on clustered global earthquake catalogs”, Jour. Geophys. Res., (2015).

Wu, C., R. Guyer, D. Shelly, W. Frank, J. Gomberg, and P. Johnson, “Spatial-temporal variation of low-frequency earthquake bursts near Parkfield, CA”, Geophys. J. Int., 202 (2): 914-919 (August 2015).

Olson Reichhardt, C., L.M. Lopatina, X. Jia, and P. Johnson, “Softening of stressed granular packings with resonant sound waves”, Physical Review E Vol.92, No.2 (2015).

Trugman, Daniel T., Chunquan Wu, Robert A. Guyer, Paul A.Johnson, “Synchronous low frequency earthquakes and implications for deep San Andreas Fault slip,” Earth and Planetary Science Letters 424 (2015) 132-139.

Riviére, J., P. Shokouhi, R. A. Guyer, and P. A. Johnson, “A set of measures for the systematic classification of the nonlinear elastic behavior of disparate rocks,” J. Geophys. Res. Solid Earth 120 (2015).

Haupert, S., Riviére, J., Anderson, B.E., Ohara, Y., Ulrich, T.J., and Johnson, P.A., “Optimized dynamic acousto-elasticity applied to fatigue damage and stress corrosion cracking,” J. Nondest. Eval. 33(2), 226-238 (2014).

Riviére, J., Remillieux, M.C., Ohara, Y., Anderson, B.E., Haupert, S., Ulrich, T.J., and Johnson, P.A., “Dynamic acousto-elasticity in a fatigue-cracked sample,” J. Nondest. Eval. 33(2), 216-225 (2014).

Renaud, G., J. Riviére, C. Larmat, J. T. Rutledge, R. C. Lee, R. A. Guyer, K. Stokoe, and P. A. Johnson, “In situ characterization of shallow elastic nonlinear parameters with Dynamic Acoustoelastic Testing,” J. Geophys. Res. Solid Earth, 119 (2014).

Ferdowsi, B., M. Griffa. R. A. Guyer, P. A. Johnson, C. Marone and J. Carmeliet, “3D Discrete Element Modeling of triggered slip in sheared granular media,” Physical Review E, 89(4), pp. 042204(1-12), (2014).

Ferdowsi, B., M. Griffa, R. A. Guyer, P. A. Johnson, and J. Carmeliet “Effect of boundary vibration on the frictional behavior of a dense sheared granular layer” Acta Mechanica,, (2014).

Riviére, J., M. C. Remillieux, Y. Ohara, B. E. Anderson, S. Haupert, T. J. Ulrich, P. A. Johnson, “Dynamic Acousto-Elasticity in a Fatigue-Cracked Sample.” Journal of Nondestructive Evaluation (Jan 2014).

Haupert, S., J. Riviére, B.E. Anderson, Y. Ohara, T.J. Ulrich, P.A. Johnson, “Optimized dynamic acousto-elasticity applied to fatigue damage and stress corrosion cracking.” Journal of Nondestructive Evaluation, (2014).

Trugman, D. T., E. G. Daub, R. A. Guyer, and P. A. Johnson, “Modeling dynamic triggering of tectonic tremor using a brittle-ductile friction model,” Geophys. Res. Lett., 40, 5075-5079 (2013).

Johnson, P. A., B. Ferdowsi, B. M. Kaproth, M. Scuderi, M. Griffa, J. Carmeliet, R. A. Guyer, P.-Y. Le Bas, D. T. Trugman, and C. Marone, “Acoustic emission and microslip precursors to stick-slip failure in sheared granular material,” Geophysical Research Letters, 40, (2013).

Riviére, J, G. Renaud, R. A. Guyer, and P. A. Johnson, “Pump and probe waves in dynamic acousto-elasticity: Comprehensive description and comparison with nonlinear elastic theories,” Journal of Applied Physics, (Vol.114, Issue 5) 6 August 2013.

Ferdowsi, B, M. Griffa, R. Guyer, E. Daub, C. Marone, P. Johnson and J. Carmeliet,“Microslips as precursors of large slip events in the stick-slip dynamics of sheared granular layers: A discrete element model analysis,” Geophysical Research Letters, (2013).

Ben Naim, E., E. Daub, and P. Johnson, “Recurrence statistics of great earthquakes,” Geophysical Research Letters, 40, 3021-3025 (2013).

Wu, C., D. R. Shelly, J. Gomberg, Z. Peng and P. Johnson, “Long-term changes of inter-event times for regular and low-frequency earthquakes in central California,” Earth and Planetary Research Letters, 368, 144-150, (2013).

Renaud, G., J. Rivière, P.-Y. Le Bas, and P. A. Johnson, Hysteretic nonlinear elasticity of Berea sandstone at low-vibrational strain revealed by dynamic acousto-elastic testing,” Geophys. Res. Lett., 40, 715-719, (2013).

Griffa, M., B. Ferdowsi, R. Guyer, E. Daub, C. Marone, P. Johnson and J. Carmeliet, Influence of vibration amplitude on dynamic triggering of slip in sheared granular layers, Phys. Rev. E, 87, 012205, (2013).

Daub, E. Ben-Naim, E., R. Guyer and P. Johnson (2012) Are mega-quakes clustered? Geophys. Res. Lett. 39 L06308-L06314.

Haupert, S., G. G. Renaud, J. Riviere, M. Talmant, P. Johnson and P. Laugier (2011) High-accuracy acoustic detection of non-classical component of material nonlinearity, J. Acoust. Soc. Am. 130, 2654-2661.

Le Bas, P. Y., T. J. Ulrich, B. E. Anderson, R. A. Guyer, and P. A. Johnson (2011) Probing the interior of a solid volume with time reversal and nonlinear elastic wave spectroscopy, J. Acoust. Soc. Am. Volume 130, Issue 4, pp. EL258-EL263.

Griffa., M., E. Daub, R. Guyer, P. Johnson, C. Marone, and J. Carmeliet (2011) Vibration-induced unjamming of sheared granular layers and the micromechanics of dynamic earthquake triggering, European Physics Letters, 96, 14001.

Daub, E., D. R. Shelly, R. Guyer, and P. Johnson (2011) Brittle and ductile friction and the physics of tectonic tremor, Geophysical Research Letters 38, L10301.

Larmat, C., R. Guyer and P. Johnson (2010) Time reversal in Seismology, Physics Today 63 31-35.

Johnson, P. A., P. Bodin, J. Gomberg, F. Pearce, Z. Lawrence, and F. Menq (2009) Inducing in situ, nonlinear soil response applying an active source, J. Geophys. Res., 114, B05304.

Anderson, B., R. A. Guyer, T.J. Ulrich and P. A. Johnson (2009) Time reversal of continuous-wave, monochromatic signals in elastic media, Applied Physics Letters, 94 111908-1-4.

Brunet, T., X. Jia and P. Johnson (2008) Transitional, elastic-nonlinear behaviour in dense granular media, Geophys. Res. Lett. 35, L19308-L19311.

Johnson, P., H. Savage, M. Knuth, J. Gomberg and C. Marone (3 January 2008) The effect of acoustic waves on stick-slip behavior in sheared granular media: implications for earthquake recurrence and triggering, Nature, 451, 57-60. (Contact Paul Johnson for reprint.)

Ulrich, TJ, Sutin, A. M., Guyer, R. A. and Johnson, P. A. (2008) Time reversal and nonlinear elastic wave spectroscopy (TR NEWS) techniques, Int. J. Nonlinear Mech., 43, 209-216.

Muller, M., T.J. Ulrich, M. Talmant, P. Laugier, and P. A. Johnson (2008) Assessment of damage in cortical bone using nonlinear acoustic techniques, in Biomedical applications of vibration and acoustics for imaging, characterization and diagnostics, ASME Press. Ed. Ahmed Al-Jumaily (invited).

Muller. M., D. Mitton, M. Talmant, P. Laugier, and P. Johnson (2008) Nonlinear ultrasound can detect accumulated damage in human bone, J. Biomechanics, 41, 1062-1068.

Anderson, B. E., M. Griffa, C. Larmat, TJ Ulrich, and P. A. Johnson (2008) Time Reversal, Acoust. Today, 4 5-16.

Pasqualini, D., K. Heitmann, J. A. TenCate, S. Habib, D. Higdon, and P. A. Johnson (2007) Nonequilibrium and nonlinear dynamics in Berea and Fontainebleau sandstones: Low-strain regime, J. Geophys. Res., 112, B01204.

Gomberg, J. and P. A. Johnson (2005) Dynamic triggering of earthquakes, Nature 473 830.

Primary Research

  • Machine Learning Applications in Geophysics

  • Fault Physics

  • Nonlinear and Disordered Systems

  • Seismic Strong Ground Motion

  • General Acoustics

  • Rock Physics

  • Acoustical Nondestructive Testing of Materials

  • Earthquake Source Mechanics

  • Time Reverse Acoustics in Solids


  • (505) 695 5994- Phone

Honors & Activities​

  • Fellow - American Physical Society (2016)

  • Fellow - Société Internationale de Méchanique Nonlinéaire de Matériaux (2016)

  • Fellow - American Geophysical Union (2011)

  • Médaille Étrangère [Foreigner's Medal] - French Acoustical Society (2010)

  • Fellow - Los Alamos National Laboratory (2008)

  • Fellow - Acoustical Society of America (2005)

  • Senior Fulbright Fellow (1999)

  • Fellow - American Geophysical Union

  • Los Alamos National Laboratory Scientific Achievement Award

  • Organizer (16X) - International Conference on Nonlinear Elasticity in Materials (ICNEM)

  • Steering Committee Member - International Symposia on Nonlinear Acoustics (ISNA)

  • Fulbright Scholar to France (1999-2000)

  • Associate Editor of Comptes-Rendus Mecanique of the French Academy of Sciences


• Ph.D., Physical Acoustics (with highest honors), La Sorbonne, Université Pierre et Marie Curie (Paris 6)

•M.S., Geophysics, University of Arizona

• B.S., Geology, University of New Mexico


• 1990 - present: Project Lead, Nonlinear Elasticity Team,

• 1984 - present: Senior Technical Staff Member, Los Alamos National Laboratory, Geophysics Group (EES- 11)

• 1990 - 1998: Project Leader, Nonlinear Elasticity Group

• 1982 - 1984: Graduate Research, University of Arizona

• 1981: Research Assistant, Los Alamos National Laboratory, ESS -2

• 1979 - 1980: Research Assistant, Los Alamos National Laboratory, ESS-2

• 1978: Field Geologist, Wyoming and Colorado, Freeport Exploration Company

• 1977: Field Geologist, southeast Alaska, Exxon

• 1976: Research Assistant, Los Alamos National Laboratory

• 1975: Research Assistant, University of New Mexico

• 1973 - 1978: Musician, New Mexico Symphony Orchestra


Sample Chapter from Nonlinear Mescopic Elasticity by Robert A. Guyer and Paul A. Johnson.

Paul A. Johnson - Google Scholar Publications