PNNL

Dr. Hunter Knox is an Earth scientist with the Energy and Environment Directorate at PNNL, where she works across the engineering field and geosciences to execute multi-disciplinary field scale research and development projects for the U.S. Department of Energy (DOE). She joined PNNL in June 2019, after a seven-year stint at Sandia National Laboratories.

Dr. Knox has led and provided technical expertise to several complex, multi-disciplinary field projects. This includes: the Enhanced Geothermal Systems Collaboration (EGS Collab), DOE’s Subsurface Science, Technology and Engineering R&D, and a variety of National Nuclear Security Administration-related meso and full-scale experiments.

Dr. Knox is known for her technical leadership and team development capabilities. Furthermore, she is a leader in subsurface characterization using seismic and other geophysical methods, meso-scale and field-scale testbed design and construction, geophysical/geomechanical experiment design, and large data integration.

Hunter is passionate, not only about technical excellence in subsurface investigations, but also in creating a safe, inclusive, and productive work environment. She does this through significant mentoring and outreach as is evident through her continued mentorship of graduate and undergraduate students and her participation in various organizations supporting STEM education, diversity, and inclusion (i.e. Sandia Women’s Action Network, Women in Geothermal (WING), DOE STEM Café).

• PhD in Earth and Environmental Science, New Mexico Institute of Mining and Technology
• BS in Geophysics, Colorado School of Mines

• Geothermal Resource Council (GRC) (2016 – Present)
• Geologic Society of America (2016 – Present)
• American Rock Mechanics Association (2015 – Present)
• Seismological Society of America (2007 – Present)
• American Geophysical Union (2006 – Present)

• Employee Recognition Award, Enhanced Geothermal Systems Collaboration Team (2019), Sandia National Laboratories (2019)
• Secretary’s Appreciation Award for Source Physics Experiment, DOE (2017)
• Heart of Diversity Award, Sandia National Laboratories (2015, 2016)
• Employee Recognition Award for Applied Electromagnetic Geophysics CRADA Team, Sandia National Laboratories (2015)
• Antarctic Service Medal, National Science Foundation (NSF) (2011)
• Early Career Scientist Award, NSF (2010)
• Phillip R. Romig Award for Outstanding Field Work (2005)

Timothy J. Draelos, Aleksandra Faust, Hunter A. Knox, Matthew G. Peterson. 2020. “Systems, methods and computer program products for self-tuning sensor data processing.” 2020 - US Patent 10837811.

2020

Ajo-franklin, J., D. Blankenship, C. Chai, T. Kneafsey, H. Knox, M. Maceira, M. Robertson, P. Sprinkle, C. Strickland, and D. Templeton. 2020. “Creation of a Mixed-Mode Fracture Network at Mesoscale through Hydraulic Fracturing and Shear Stimulation.” Journal of Geophysical Research: Solid Earth 125 (12). https://doi.org/10.1029/2020JB019807.

Draelos, T. J., A. Faust, H. A. Knox, and M. G. Peterson. 2020. Systems, Methods and Computer Program Products for Self-Tuning Sensor Data Processing. US Patent 10,837,811.

Hoots, C. R., R. Abbott, L. Preston, H. Knox, and P. C. Schwering. 2020. Near-Field Imaging of Shallow Chemical Explosions in Granite Using Change Detection Methods with Surface and Borehole Seismic Data. Sandia National Lab., Albuquerque, NM (United States).

Kneafsey, T. J., D. Blankenship, P. F. Dobson, J. Morris, M. D. White, P. Fu, H. A. Knox, L. Huang, P. Schwering, and J. B. Ajo-Franklin. 2020. “The EGS Collab Project: Stimulation and Flow at the 10-Meter Scale.” AGU Fall Meeting 2020.

Kneafsey, T. J., D. Blankenship, P. F. Dobson, J. P. Morris, M. D. White, P. Fu, P. C. Schwering, J. B. Ajo-Franklin, L. Huang, and M. Schoenball. 2020. “The EGS Collab Project: Learnings from Experiment 1.” Proceedings 45th Workshop on Geothermal Reservoir Engineering.

Schoenball, M., J. B. Ajo-Franklin, D. Blankenship, C. P. Chai, A. Chakravarty, P. Dobson, C. Hopp, T. Kneafsey, H. A. Knox, M. Maceira, M. C. Robertson, P. Sprinkle, C. Strickland, D. Templeton, P. C. Schwering, C. Ulrich, T. Wood, and E. C. Team. 2020. “Creation of a Mixed-Mode Fracture Network at Mesoscale through Hydraulic Fracturing and Shear Stimulation.” Journal of Geophysical Research-Solid Earth 125 (12): e2020JB019807. https://doi.org/10.1029/2020JB019807.

Young, B., K. N. Chojnicki, H. A. Knox, and J. D. Lowrey. 2020. “Comparison of Distributed Acoustic Sensing (DAS) and Co-Located Geophones of a Chemical Explosion in a Borehole at Blue Canyon Dome, Socorro, NM.” AGU Fall Meeting 2020.

2019

Ajo-Franklin, J. B., M. Schoenball, T. Wood, M. Robertson, P. Schwering, H. A. Knox, L. Huang, P. F. Dobson, and T. J. Kneafsey. 2019. “Creating a Densely Instrumented Subsurface Observatory: Combining Active/Passive Seismic Arrays and Distributed Fiber Optic Sensing for Fracture Characterization at the Collab Facility.” AGUFM 2019: MR21B-0070.

Fu, P., M. Schoenball, J. Morris, J. Ajo-Franklin, H. Knox, T. Kneafsey, J. Burghardt, and M. White. 2019. Microseismic Signatures of Hydraulic Fracturing: A Preliminary Interpretation of Intermediate-Scale Data from the EGS Collab Experiment 1. Lawrence Livermore National Lab.(LLNL), Livermore, CA (United States).

Ingraham, M. 2019. “Developments in Geothermal Energy.” AGU Fall Meeting 2019.

Ingraham, M. D., H. A. Knox, C. Strickland, V. Vermeul, and J. Burghardt. 2019. Analysis of Pressure/Flow Response Data from the EGS Collab Project. Sandia National Lab., Albuquerque, NM (United States).

James, S. R., H. A. Knox, R. E. Abbate, M. P. Panning, and E. J. Screaton. 2019. “Insights into Permafrost and Seasonal Active-Layer Dynamics from Ambient Seismic Noise Monitoring.” Journal of Geophysical Research-Earth Surface 124 (7): 1798–1816. https://doi.org/10.1029/2019jf005051.

Johnson, T., C. Strickland, H. Knox, J. Thomle, V. Vermuel, C. Ulrich, T. Kneafsey, D. Blankenship, and E. C. Team. 2019. “EGS Collab Project Electrical Resistivity Tomography Characterization and Monitoring Status.” 44th Workshop on Geothermal Reservoir Engineering.

Johnson, T. C., C. E. Strickland, H. Knox, J. Thomle, V. R. Vermeul, C. Ulrich, T. J. Kneafsey, and D. A. Blankenship. 2019. EGS Collab Project Electrical Resistivity Tomography Characterization and Monitoring. Pacific Northwest National Lab.(PNNL), Richland, WA (United States).

Johnson, T. C., C. E. Strickland, H. A. Knox, J. A. Burghardt, V. R. Vermeul, P. Schwering, M. D. Ingraham, and T. J. Kneafsey. 2019. “Geomechanically-Induced Electrical Resistance Responses During High-Pressure Flow Tests in a Stimulated Fracture Zone.” AGU Fall Meeting 2019.

Kneafsey, T., P. Dobson, J. Ajo-Franklin, Y. Guglielmi, C. Valladao, D. Blankenship, P. Schwering, H. Knox, M. White, and T. Johnson. 2019. “EGS Collab Project: Status, Tests, and Data.” 53rd US Rock Mechanics/Geomechanics Symposium.

Kneafsey, T. J., D. Blankenship, P. F. Dobson, J. Morris, M. D. White, P. Fu, P. Schwering, H. A. Knox, T. C. Johnson, and J. B. Ajo-Franklin. 2019. “Stimulation and Flow Tests in Deep Crystalline Rock-The EGS Collab Project.” AGUFM 2019: H14D-08.

Kneafsey, T. J., D. Blankenship, H. A. Knox, T. C. Johnson, J. B. Ajo-Franklin, P. C. Schwering, P. F. Dobson, J. P. Morris, M. D. White, and R. Podgorney. 2019. “EGS Collab Project: Status and Progress.” Proceedings 44th Workshop on Geothermal Reservoir Engineering, Stanford University.

Kneafsey, T. J., D. A. Blankenship, P. F. Dobson, J. Morris, M. D. White, H. A. Knox, T. C. Johnson, J. Ajo-Franklin, P. C. Schwering, and P. Fu. 2019. EGS Collab Project: Accomplishments and Plan. Pacific Northwest National Lab.(PNNL), Richland, WA (United States).

Linneman, D., P. Sprinkle, H. A. Knox, C. E. Strickland, T. C. Johnson, M. D. Ingraham, J. Knox, B. Young, P. Schwering, and M. C. Grubelich. 2019. “Baseline Characterization for Change Detection with Joint Inversion of ERT and Campaign Seismic Data.” AGU Fall Meeting 2019.

Mangel, A., T. Johnson, C. Strickland, H. Knox, J. Burghardt, V. Vermeul, P. Schwering, M. Ingraham, and T. Kneafsey. 2019. “Geomechanically-Induced Electrical Resistance Responses During High-Pressure Flow Tests in a Stimulated Fracture Zone.” AGUFM 2019: H11K-1643.

Neupane, G. H., R. K. Podgorney, H. Huang, E. D. Mattson, T. J. Kneafsey, P. F. Dobson, M. Schoenball, J. B. Ajo-Franklin, C. Ulrich, and P. C. Schwering. 2019. EGS Collab Earth Modeling: Integrated 3D Model of the Testbed. Idaho National Lab.(INL), Idaho Falls, ID (United States).

Schoenball, M., J. Ajo-Franklin, D. Blankenship, P. Cook, P. Dobson, Y. Guglielmi, P. Fu, T. Kneafsey, H. Knox, and P. Petrov. 2019. “Microseismic Monitoring of Meso-Scale Stimulations for the DOE EGS Collab Project at the Sanford Underground Research Facility.” Proceedings: 44th Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, CA.

Schoenball, M., Y. Guglielmi, J. B. Ajo-Franklin, P. J. Cook, P. F. Dobson, T. J. Kneafsey, H. A. Knox, P. Schwering, F. Soom, and C. Ulrich. 2019. “Direct Observation of Co-Seismic Deformation at 1.5 Km Depth: The EGS Collab Fracture Stimulation Test.” AGUFM 2019: S21F-0574.

Schwering, P. C., C. R. Hoots, H. A. Knox, R. Abbott, and L. Preston. 2019. Near-Field Imaging of Shallow Chemical Detonations in Granite Using Change Detection Methods of Borehole Seismic Data. Sandia National Lab., Albuquerque, NM (United States).

Singh, A., G. Neupane, P. Dobson, M. Zoback, J. Morris, P. Fu, P. Schwering, W. Roggenthen, L. Frash, and T. Kneafsey. 2019. Slip Tendency Analysis of Fracture Networks to Determine Suitability of Candidate Testbeds for the EGS Collab Hydroshear Experiment. Idaho National Lab.(INL), Idaho Falls, ID (United States).

Templeton, D., J. Morris, M. Schoenball, T. Wood, M. Robertson, P. Cook, P. Dobson, C. Ulrich, J. Ajo-Franklin, and T. Kneafsey. 2019. Microseismic Correlation and Cluster Analysis of DOE EGS Collab Data. Lawrence Livermore National Lab.(LLNL), Livermore, CA (United States).

2018

Abbott, R., H. A. Knox, R. Mellors, A. Pitarka, T. Coleman, and T. Parker. 2018. Downhole and Surface Fiber Optic DAS Recordings of a 1000 Kg Tnt-Equivalent Chemical Explosion in Alluvium. Sandia National Lab., Albuquerque, NM (United States).

Ajo Franklin, J. B., M. Schoenball, T. Wood, M. Robertson, P. Petrov, L. Huang, T. J. Kneafsey, P. Schwering, D. Blankenship, and H. Knox. 2018. “Imaging Hydraulic Fracture Propagation Using Semi-Permanent Continuous Active Seismic Source Monitoring: Results from the DOE EGS Collab Experiment.” AGUFM 2018: H32C-07.

Dobson, P., T. Kneafsey, J. Morris, A. Singh, M. Zoback, W. Roggenthen, T. Doe, G. Neupane, R. Podgorney, and H. Wang. 2018. “The EGS Collab Hydroshear Experiment at the Sanford Underground Research Facility–Siting Criteria and Evaluation of Candidate Sites.” Geothermal Resources Council Transactions 42: 708–723.

Draelos, T. J., M. G. Peterson, H. A. Knox, B. J. Lawry, K. E. Phillips‐Alonge, A. E. Ziegler, E. P. Chael, C. J. Young, and A. Faust. 2018. “Dynamic Tuning of Seismic Signal Detector Trigger Levels for Local Networksdynamic Tuning of Seismic Signal Detector Trigger Levels for Local Networks.” Bulletin of the Seismological Society of America 108 (3A): 1346–1354.

Ingraham, M. D., D. K. King, H. A. Knox, C. Strickland, V. Vermeul, Y. Guglielmi, P. Cook, and T. Doe. 2018. “Design of a Long Term Hydraulic Fracture and Flow System.” 52nd US Rock Mechanics/Geomechanics Symposium.

Kneafsey, T., D. Blankenship, P. F. Dobson, H. Knox, T. C. Johnson, J. Ajo-Franklin, P. Schwering, J. Morris, M. D. White, and R. Podgorney. 2018. “EGS Collab Project Experiment 1 Overview and Progress.” Geothermal Resources Council Transactions 42.

Kneafsey, T., P. Dobson, D. Blankenship, J. Morris, H. Knox, P. Schwering, M. White, T. Doe, W. Roggenthen, and E. Mattson. 2018. “The EGS Collab Team: An Overview of the EGS Collab Project: Field Validation of Coupled Process Modeling of Fracturing and Fluid Flow at the Sanford Underground Research Facility, Lead, Sd, Proceedings.” 43rd Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, California, SGP-TR-213.

Kneafsey, T. J., D. Blankenship, P. F. Dobson, H. A. Knox, T. C. Johnson, P. C. Schwering, J. Morris, J. B. Ajo Franklin, M. D. White, and P. Fu. 2018. “Investigations in Stimulating Crystalline Rock: Hypotheses and Uncertainties.” AGUFM 2018: H21P-1919.

Kneafsey, T. J., D. Blankenship, P. F. Dobson, J. Morris, M. D. White, H. Knox, J. B. Ajo Franklin, R. K. Podgorney, T. C. Johnson, and L. Huang. 2018. “Overview of the EGS Collab Project: Stimulation and Validation.” AGUFM 2018: H32C-05.

Kneafsey, T. J., P. Dobson, D. Blankenship, J. Morris, H. Knox, P. Schwering, M. White, T. Doe, W. Roggenthen, and E. Mattson. 2018. “An Overview of the EGS Collab Project: Field Validation of Coupled Process Modeling of Fracturing and Fluid Flow at the Sanford Underground Research Facility, Lead, Sd.” 43rd Workshop on Geothermal Reservoir Engineering, Stanford University, paper SGP-TR-213.

Kneafsey, T. J., P. F. Dobson, J. Ajo-Franklin, C. Valladao, D. A. Blankenship, H. Knox, P. Schwering, J. Morris, M. Smith, and M. D. White. 2018. “The EGS Collab Project: Stimulation and Simulation.” 52nd US Rock Mechanics/Geomechanics Symposium.

Kneafsey, T., P. Dobson, D. Blankenship, J. Morris, H. Knox, P. Schwering, M. White, T. Doe, W. Roggenthen, and E. Mattson. 2018. “An Overview of the EGS Collab Project: Field Validation of Coupled Process Modeling of Fracturing and Fluid Flow at the Sanford Underground Research Facility, Lead, Sd.” 43rd Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, California.

Knox, H. A., J. A. Chaput, R. C. Aster, and P. R. Kyle. 2018. “Multiyear Shallow Conduit Changes Observed with Lava Lake Eruption Seismograms at Erebus Volcano, Antarctica.” Journal of Geophysical Research-Solid Earth 123 (4): 3178–3196. https://doi.org/10.1002/2017jb015045.

Linneman, D., H. Knox, P. Schwering, and C. R. Hoots. 2018. “The EGS Collab Hydrofracture Experiment at the Sanford Underground Research Facility-Campaign Cross-Borehole Seismic Characterization.” AGUFM 2018: H11Q-1689.

Malehmir, A., A. Pasanen, A. Sims, A. Brownley, A. Fukuda, A. Raef, A. Alhaj, A. Smiarowski, A. Aydin, and A.-A. Behroozmand. 2018. “Sageep 2018 Papers with Only a Paragraph Abstract.” Symposium on the Application of Geophysics to Engineering and Environmental Problems 2018.

Morris, J., P. Dobson, H. Knox, J. Ajo-Franklin, M. White, P. Fu, J. Burghardt, T. Kneafsey, D. Blankenship, and E. Team. 2018. “Experimental Design for Hydrofracturing and Fluid Flow at the DOE Collab Testbed in Proceedings.” 43rd Workshop on Geothermal Reservoir Engineering.

Morris, J. P., P. Fu, P. Dobson, J. Ajo-Franklin, T. Kneafsey, H. Knox, D. Blankenship, M. White, J. Burghardt, and T. Doe. 2018. “Experimental Design for Hydrofracturing and Fluid Flow at the DOE EGS Collab Testbed.” 52nd US Rock Mechanics/Geomechanics Symposium.

Schwering, P., K. Condon, H. A. Knox, D. Linneman, and C. R. Hoots. 2018. EGS Collab Testbed 1: Baseline Cross-Well Seismic. DOE Geothermal Data Repository; Lawrence Berkeley National Laboratory.

Templeton, D. C., J. Morris, M. Schoenball, T. Wood, M. Robertson, P. J. Cook, P. F. Dobson, C. Ulrich, J. B. Ajo Franklin, and T. J. Kneafsey. 2018. “What Can Microseismicity at the First EGS Collab Site Tell Us About the Subsurface Fracture Network?” AGUFM 2018: H11Q-1690.

2017

Dobson, P., T. J. Kneafsey, D. Blankenship, C. Valladao, J. Morris, H. Knox, P. Schwering, M. White, T. Doe, and W. Roggenthen. 2017. “An Introduction to the EGS Collab Project.” GRC Transactions 41: 837–849.

Draelos, T. J., H. A. Knox, M. G. Peterson, B. J. Lawry, C. J. Young, K. Phillips-Alonge, and A. Faust. 2017. Examples and Analysis of Adaptive Self-Tuning of a Seismic Signal Detector. Sandia National Lab., Albuquerque, NM (United States).

Draelos, T. J., M. G. Peterson, H. A. Knox, B. J. Lawry, K. Philips-Alonge, A. Ziegler, E. Chael, C. J. Young, and A. Faust. 2017. Adaptive Self-Tuning of Signal Detection Parameters. Sandia National Lab., Albuquerque, NM (United States).

Harris, J. M., C. J. Young, B. R. Hamlet, D. B. Carr, and H. A. Knox. 2017. IDC Re-Engineering Phase 2 Data Model. Sandia National Lab., Albuquerque, NM (United States).

Hoots, C. R., H. A. Knox, R. Abbott, and L. Preston. 2017. Cross Borehole Change Detection Imaging for the Source Physics (SPE) at the Nevada National Security Site (Nnss). Sandia National Lab., Albuquerque, NM (United States).

James, S., B. Ahmmed, H. Knox, T. Johnson, and J. A. Dunbar. 2017. “Electrical Conductivity Distributions in Discrete Fluid-Filled Fractures.” AGUFM 2017: H23A-1625.

James, S. R., H. A. Knox, R. E. Abbott, and E. J. Screaton. 2017. “Improved Moving Window Cross-Spectral Analysis for Resolving Large Temporal Seismic Velocity Changes in Permafrost.” Geophysical Research Letters 44 (9): 4018–4026. https://doi.org/10.1002/2016gl072468.

James, S. R., H. A. Knox, L. Preston, J. M. Knox, M. C. Grubelich, D. K. King, J. B. Ajo-Franklin, T. C. Johnson, and J. P. Morris. 2017. “Fracture Detection and Imaging through Relative Seismic Velocity Changes Using Distributed Acoustic Sensing and Ambient Seismic Noise.” The Leading Edge 36 (12): 1009–1017.

Knox, H., P. Fu, J. Morris, Y. Guglielmi, V. Vermeul, J. Ajo-Franklin, C. Strickland, T. Johnson, P. Cook, and C. Herrick. 2017. “Fracture and Flow Designs for the Collab.” SIGMA-V Project in GRC Transactions 41.

Knox, H. A. 2017. Gto Peer Review-SIGMA-V Collab Task 4: Stimulation in Stress Condition 1 (Experiment 1). Sandia National Lab., Albuquerque, NM (United States).

Knox, H. A., R. Abbott, L. Preston, C. R. Hoots, and P. C. Schwering. 2017. Cross Borehole Change Detection. Sandia National Lab., Albuquerque, NM (United States).

Knox, H. A., T. J. Draelos, C. J. Young, M. G. Peterson, K. D. Phillips-Allonge, R. N. Balch, and A. E. Ziegler. 2017. Experiments on Adaptive Self-Tuning of Seismic Signal Detector Parameters. Sandia National Lab., Albuquerque, NM (United States).

Knox, H. A., P. Fu, J. Morris, Y. Guglielmi, V. Vermeul, J. Ajo-Franklin, C. Strickland, T. Johnson, P. Cook, and C. G. Herrick. 2017. Fracture and Flow Designs for the Collab/SIGMA-V Project. Sandia National Lab., Albuquerque, NM (United States).

Knox, H. A., S. James, J. Ajo-Franklin, T. Johnson, J. Morris, M. C. Grubelich, and D. K. King. 2017. Imaging Fractures through Relative Velocity Change Using Ambient Seismic Noise and Distributed Acoustic Sensing (DAS): A Subter Pilot Study At Blue Canyon Dome Socorro Nm. Sandia National Lab., Albuquerque, NM (United States).

Ziegler, A. E., R. Balch, H. A. Knox, J. Van Wijk, T. J. Draelos, and M. G. Peterson. 2017. Evaluation of Adaptive Sensor Tuning for Microseismic Event Detection in Varying Noise Conditions at A Carbon Capture Utilization and Storage Site. Sandia National Lab., Albuquerque, NM (United States).

2016

Abbott, R., T. Finlay, D. Tang, S. James, H. Knox, and J. Hampshire. 2016. Hammering Yucca Flat Part Two: Shear Wave Velocity. Sandia National Lab., Albuquerque, NM (United States).

Abbott, R., H. A. Knox, and S. James. 2016. Palsie: Permafrost Active-Layer Seismic Experiment. Sandia National Lab., Albuquerque, NM (United States).

Abbott, R., L. D. Toney, H. A. Knox, L. Preston, and C. R. Hoots. 2016. Surface-Wave Tomography of Yucca Flat Nevada. Sandia National Lab., Albuquerque, NM (United States).

Chaput, J., V. Clerc, M. Campillo, P. Roux, and H. Knox. 2016. “On the Practical Convergence of Coda-Based Correlations: A Window Optimization Approach.” Geophysical Journal International 204 (2): 736–747. https://doi.org/10.1093/gji/ggv476.

Draelos, T., H. A. Knox, C. J. Young, E. P. Chael, M. G. Peterson, B. Lawry, K. E. Phillips-Alonge, R. S. Balch, and A. Ziegler. 2016. “Experiments on Adaptive Self-Tuning of Seismic Signal Detector Parameters.” 2016 AGU Fall Meeting.

James, S., H. Knox, J. Ajo Franklin, T. Johnson, J. Morris, M. Grubelich, and D. King. 2016. “Imaging Fractures through Relative Velocity Change Using Ambient Seismic Noise and Distributed Acoustic Sensing (DAS): A Subter Pilot Study At Blue Canyon Dome, Socorro Nm.” AGUFM 2016: S11D-2497.

James, S., H. A. Knox, C. Cole, R. Abbott, and E. Screaton. 2016. Insights into Seasonal Active Layer Dynamics by Monitoring Relative Velocity Changes Using Ambient Seismic Noise. Sandia National Lab., Albuquerque, NM (United States).

James, S. R., H. A. Knox, R. Abbott, and E. J. Screaton. 2016. Monitoring Active Layer Freeze/Thaw Using Seismic Noise. Sandia National Lab., Albuquerque, NM (United States).

Knox, H. A. 2016. Geophysical Monitoring and Imaging. Sandia National Lab., Albuquerque, NM (United States).

Knox, H. A., J. Ajo-Franklin, T. Johnson, J. Morris, M. C. Grubelich, L. Preston, J. M. Knox, and D. K. King. 2016. Imaging Fracture Networks Using Joint Seismic and Electrical Change Detection Techniques. Sandia National Lab., Albuquerque, NM (United States).

Knox, H. A., J. B. Ajo-Franklin, T. C. Johnson, J. P. Morris, M. C. Grubelich, L. Preston, J. M. Knox, and D. K. King. 2016. High Energy Stimulations Imaged with Geophysical Change Detection Techniques. Sandia National Lab., Albuquerque, NM (United States).

Knox, H. A., K. A. Schramm, and L. C. Bartel. 2016. The DC Response of Electrically Conducting Fractures Excited by A Grounded Current Source. Sandia National Lab., Albuquerque, NM (United States).

Peterson, M. G., H. A. Knox, E. P. Chael, B. J. Lawry, K. E. Phillips-Alonge, C. J. Young, and T. J. Draelos. 2016. Self-Tuning Seismic Sensors: Real-Time Trigger Level Adjustments. Sandia National Lab., Albuquerque, NM (United States).

Phillips-Alonge, K. E., H. A. Knox, and C. C. Ober. 2016. SPE5 Far-Field Waveform Predictions Using Full Waveform Inversion. Sandia National Lab., Albuquerque, NM (United States).

Phillips-Alonge, K. E., H. A. Knox, L. Preston, and C. C. Ober. 2016. Full Waveform Source Inversions for SPE Data: Results Challenges and Lessons Learned. Sandia National Lab., Albuquerque, NM (United States).

Preston, L., R. Abbott, N. Bonal, H. A. Knox, and K. E. Phillips-Alonge. 2016. Geophysics Capabilities Brief. Sandia National Lab., Albuquerque, NM (United States).

Toney, L. D., R. E. Abbott, H. A. Knox, L. A. Preston, and C. R. Hoots. 2016. “Surface-Wave Tomography of Yucca Flat, Nevada.” AGUFM 2016: S51A-2744.

Weiss, C., H. Knox, and D. Aldridge. 2016. “Experiment Design Study in 3D DC Resistivity: Adjoint Sensitivities in a Horizontal Steel-Cased Borehole.” In Seg Technical Program Expanded Abstracts 2016, 942–947. Society of Exploration Geophysicists.

Weiss, C. J., D. F. Aldridge, H. A. Knox, K. A. Schramm, and L. C. Bartel. 2016. “The Direct-Current Response of Electrically Conducting Fractures Excited by a Grounded Current Source.” Geophysics 81 (3): E201-E210. https://doi.org/10.1190/Geo2015-0262.1.

Ziegler, A., R. S. Balch, H. A. Knox, J. W. Van Wijk, T. Draelos, and M. G. Peterson. 2016. “Automated Sensor Tuning for Seismic Event Detection at a Carbon Capture, Utilization, and Storage Site, Farnsworth Unit, Ochiltree County, Texas.” AGU Fall Meeting Abstracts.

2015

Aldridge*, D. F., C. J. Weiss, H. A. Knox, K. A. Schramm, and L. C. Bartel. 2015. “Is a Steel-Cased Borehole an Electrical Transmission Line?” In Seg Technical Program Expanded Abstracts 2015, 736–741. Society of Exploration Geophysicists.

Chaput, J., M. Campillo, R. C. Aster, P. Roux, P. R. Kyle, H. Knox, and P. Czoski. 2015. “Multiple Scattering from Icequakes at Erebus Volcano, Antarctica: Implications for Imaging at Glaciated Volcanoes.” Journal of Geophysical Research-Solid Earth 120 (2): 1129–1141. https://doi.org/10.1002/2014jb011278.

Draelos, T. J., B. J. Lawry, M. G. Peterson, H. A. Knox, S. L. Cafferky, C. J. Young, E. P. Chael, C. Walker, and J. M. Harris. 2015. Self-Tuning Seismic Sensor Data Processing. Sandia National Lab., Albuquerque, NM (United States).

Draelos, T. J., M. G. Peterson, B. J. Lawry, H. A. Knox, A. Faust, E. P. Chael, and C. J. Young. 2015. Adaptive Self-Tuning Networks. Sandia National Lab., Albuquerque, NM (United States).

Finlay, T. S., R. E. Abbott, H. A. Knox, D. G. Tang, S. R. James, M. M. Haney, and J. B. Hampshire. 2015. “Hammering Yucca Flat, Part Two: Shear-Wave Velocity.” AGUFM 2015: S53B-2809.

James, S. R., H. A. Knox, and R. E. Abbott. 2015. “Monitoring Seasonal Changes in Permafrost Using Seismic Interferometry.” AGUFM 2015: S34B-06.

Knox, H., T. Draelos, C. Young, B. Lawry, E. Chael, A. Faust, and M. Peterson. 2015. “Adaptive Self-Tuning Networks.” AGUFM 2015: IN51A-1782.

Knox, H. A., R. Abbott, S. James, R. Lee, and C. B. Cole. 2015. Permafrost Active Layer Seismic Interferometry Experiment (Palsie) and Satellite Observations. Sandia National Lab., Albuquerque, NM (United States).

Knox, H. A., R. Abbott, S. U. James, and E. U. Screaton. 2015. Monitoring Seasonal Changes in Permafrost Using Seismic Interferometry. Sandia National Lab., Albuquerque, NM (United States).

Knox, H. A., M. C. Grubelich, L. Preston, J. M. Knox, and D. K. King. 2015. Imaging Fracture Networks Using Crosshole Seismic Logging and Change Detection Techniques. Sandia National Lab., Albuquerque, NM (United States).

Knox, H. A., M. C. Grubelich, L. A. Preston, J. M. Knox, and D. K. King. 2015. “Imaging Fracture Networks Using Angled Crosshole Seismic Logging and Change Detection Techniques.” AGUFM 2015: H51M-1573.

Knox, H. A., K. A. Schramm, D. F. Aldridge, C. J. Weiss, A. R. Halloran, L. C. Bartel, C. C. Cannan, T. C. Palisch, and W. C. Al-Tailji. 2015. Electromagnetic Detection of Proppant. Sandia National Lab., Albuquerque, NM (United States).

Phillips-Alonge, K. E., H. Knox, C. Ober, and R. E. Abbott. 2015. Full Waveform Inversion Methods for Source and Media Characterization before and after SPE5. Sandia National Lab., Albuquerque, NM (United States).

Schramm, K. A., D. F. Aldridge, L. C. Bartel, H. A. Knox, and C. J. Weiss. 2015. “Electromagnetic Measurements in an Active Oilfield Environment.” AGUFM 2015: NS31A-1952.

Weiss, C. J., D. F. Aldridge, H. A. Knox, K. A. Schramm, and L. C. Bartel. 2015. “Measuring Changes in Electrical Conductivity of Fractures from DC Resistivity Data in an Active Oilfield Environment: A Model Study for Surface-Based Data.” AGUFM 2015: NS31A-1953.

Weiss*, C. J., D. F. Aldridge, H. A. Knox, K. A. Schramm, and L. C. Bartel. 2015. “The DC Response of Electrically Conducting Fractures Excited by a Grounded Current Source.” In Seg Technical Program Expanded Abstracts 2015, 930–936. Society of Exploration Geophysicists.

2014

Aldridge, D. F., L. C. Bartel, H. A. Knox, and K. A. Schramm. 2014. “Resolution in Electromagnetic Prospecting.” AGUFM 2014: NS43A-3848.

Aldridge, D. F., L. C. Bartel, H. A. Knox, K. A. Schramm, and C. J. Weiss. 2014. Numerical Studies of Electromagnetic Resolution. Sandia National Lab., Albuquerque, NM (United States).

Chaput, J. A., M. Campillo, P. Roux, H. A. Knox, and R. C. Aster. 2014. “Towards Temporal Monitoring Using Coda Correlations of Icequakes on Erebus Volcano, Antarctica.” AGU Fall Meeting Abstracts.

Lee, R. F., R. E. Abbott, H. A. Knox, and A. Pancha. 2014. “Seasonal Changes in H/V Spectral Ratio at High-Latitude Seismic Stations.” AGUFM 2014: S41A-4438.

2013

Aldridge, D. F., L. C. Bartel, and H. A. Knox. 2013. “Finite-Difference Algorithm for Simulating 3D Electromagnetic Wavefields in Conductive Media.” AGUFM 2013: GP51C-1086.

Clark, B., R. Abbott, H. Knox, M. Eimer, D. Hart, J. Skaggs, and J. Denning. 2013. “ROMI: Refraction Microtremor Using Rotational Seismometers.” AGUFM 2013: NS21A-1563.

Knox, H., R. Abbott, N. Bonal, and L. Preston. 2013. “Using Spectral Losses to Map a Damage Zone for the Source Physics Experiments (SPE).” AGUFM 2013: S33B-2422.

McMahon, N., J. Chaput, H. Knox, R. Aster, and P. Kyle. 2013. “Recovering Seismic Green’s Functions Using Icequake Coda Interferometry at Erebus Volcano, Antarctica.” AGUFM 2013: S43B-2516.

Zandomeneghi, D., R. Aster, P. Kyle, A. Barclay, J. Chaput, and H. Knox. 2013. “Internal Structure of Erebus Volcano, Antarctica Imaged by High-Resolution Active-Source Seismic Tomography and Coda Interferometry.” Journal of Geophysical Research-Solid Earth 118 (3): 1067–1078. https://doi.org/10.1002/jgrb.50073.

2012

Chaput, J. A., D. Zandomeneghi, R. C. Aster, H. Knox, and P. R. Kyle. 2012. “Imaging of Erebus Volcano Using Body Wave Seismic Interferometry of Strombolian Eruption Coda.” Geophysical Research Letters 39 (7). https://doi.org/10.1029/2012gl050956.

Knox, H., R. Abbott, N. Bonal, D. Aldridge, L. Preston, and C. Ober. 2012. “Change Detection Via Cross-Borehole and Vsp Seismic Surveys for the Source Physics Experiments (SPE) at the Nevada National Security Site (Nnss).” AGUFM 2012: S23A-2525.

Knox, H. A. 2012. “Eruptive Characteristics and Glacial Earthquake Investigation on Erebus Volcano, Antarctica.” New Mexico Institute of Mining and Technology.

2011

Chaput, J., D. Zandomeneghi, R. Aster, H. Knox, and P. Kyle. 2011. “3-D Reflectivity Model of Shallow Magmatic Structure Using Body Wave Seismic Interferometry Applied to Strombolian Eruption Coda for Erebus Volcano.” AGUFM 2011: S34B-07.

2010

Aster, R., J. Chaput, P. Kyle, and H. Knox. 2010. “Evidence for Temporally Varying Shallow Magmatic Structure at Erebus Volcano from Correlations of Repeating Strombolian Eruption Coda.” AGUFM 2010: S13B-1988.

Knox, H., R. Aster, and P. Kyle. 2010. “Seasonality of Shallow Icequakes at Mount Erebus Volcano, Antarctica.” AGUFM 2010: C52A-04.

Maraj, S., R. Aster, H. Knox, D. Zandomeneghi, C. Snelson, and P. Kyle. 2010. “Two-Dimensional Tomographic Inversion Model of Ross Island, Antarctica.” AGUFM 2010: T21D-2202.

2009

Chaput, J., H. Knox, R. Aster, and P. Kyle. 2009. “Green’s Function Estimates from Body-Wave Autocorrelations of Strombolian Eruption Coda at Erebus Volcano: Evidence for Temporally Varying Shallow Magmatic Structure.” AGUFM 2009: V23D-2105.

Knox, H., J. Chaput, R. Aster, and P. Kyle. 2009. “Time-Varying Lags between Short-Period and Very Long Period Strombolian Eruption Seismic Signals at Erebus Volcano, Antarctica.” AGUFM 2009: V31G-07.

Maraj, S., P. Kyle, D. Zandomeneghi, H. Knox, R. Aster, C. Snelson, P. Miller, and G. Kaip. 2009. “Controlled-Source Seismic Investigations of the Crustal Structure beneath Erebus Volcano and Ross Island, Antarctica: Preliminary Results.” AGUFM 2009: V23D-2103.

2008

Aster, R., D. Zandomeneghi, S. Mah, S. McNamara, D. B. Henderson, H. Knox, and K. Jones. 2008. “Moment Tensor Inversion of Very Long Period Seismic Signals from Strombolian Eruptions of Erebus Volcano.” Journal of Volcanology and Geothermal Research 177 (3): 635–647. https://doi.org/10.1016/j.jvolgeores.2008.08.013.

Knox, H., J. Chaput, D. Henderson, R. Aster, and P. Kyle. 2008. “Decadal-Scale, Time-Varying Lags between Short Period Strombolian Eruption and Very Long Period Seismic Signals at Erebus Volcano, Antarctica.” AGUFM 2008: V11C-2051.