**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.__ https://www.osti.gov//servlets/purl/1887451. 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, I__nvestigating 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, https://eartharxiv.org/g2dt8/.

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

**Contact**

(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

**Education**

• 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

**Experience**

• 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

**Publications **

__Sample Chapter__ from Nonlinear Mescopic Elasticity by Robert A. Guyer and Paul A. Johnson.

Paul A. Johnson - __Google Scholar Publications__