Publications

Notes: * indicates first author; ^† indicates student first author

Journal Articles

• ^†Pandey, A., J. Shragge, A.J. Girard, (2025) “First-order control factors for ocean-bottom ambient seismology interferometric observations,” Geophysical Journal International, Volume 243, Issue 2.

• ^†Pandey, A., S. de Ridder, J. Shragge, A.J. Girard, (2025) “Ocean-bottom seismic interferometry in coupled acoustic-elastic media,” Geophysical Journal International, Volume 242, Issue 3.

• *Girard, A.J., J. Shragge, M. Danilouchkine, C. Udengaard, S. Gerritsen, (2024) “Observations from the Seafloor: Ultra-low-frequency Ambient Ocean-Bottom Nodal Seismology at the Amendment Field,” Geophysical Journal International, Volume 239, Issue 1, Pages 17–36. [EarthArXiv]

• Shragge, J., A.J. Girard, C. Oren, R. Krahenbuhl (2024) “Elastic Time-Reverse Imaging of Backscattered Surface-Wave Data,” GEOPHYSICS 89: KS119-KS128.

• Nakata, R., N. Nakata, A.J. Girard, D. Lumley, M. Ichikawa, A. Kato, Z. Xue, (2024) “Time-lapse velocity change estimation by anisotropic elastic full waveform inversion for CO₂ sequestration at the Nagaoka CCS site,” International Journal of Greenhouse Gas Control 136, 104176.

• ^†Chambers, D., G. Jin, A. Tourei, A.H. Saeed Issah, A. Lellouch, E. Martin, D. Zhu, A. Girard, S. Yuan, T. Cullison, T. Snyder, S. Kim, N. Danes, N. Punithan, M.S. Boltz, and M.M. Mendoza, (2024) “DASCore: a Python Library for Distributed Fiber Optic Sensing,” Seismica 3(2).

• ^†Yang, J., J. Shragge, A.J. Girard, E. Gonzalez, J. Ticona, A. Minaya and R. Krahenbuhl, (2023) “Seismic Characterization of a Recent Majes Landslide Complex,” Sustainability, 15, no. 18: 13574.

• ^†Pandey, A., J. Shragge, D. Chambers, and A. Girard, (2023) “Developing a Distributed Acoustic Sensing Seismic Land Streamer: Concept and Validation,” GEOPHYSICS, 88: WC59-WC67.

• *Girard, A.J., Shragge, J. and Olofsson, B., (2023) “Low-frequency ambient ocean-bottom node surface-wave seismology: A Gulf of Mexico case history,” GEOPHYSICS 88: B21-B32. [Kudos]

• *Girard, A.J. and Shragge, J. (2020) “Automated processing strategies for ambient seismic data,” Geophysical Prospecting, 68: 293-312.

• *Girard, A.J. and Shragge, J. (2020) “Direct migration of ambient seismic data,” Geophysical Prospecting, 68: 270-292.

• *Girard, A.J. (2019) “Automated processing and direct migration of ambient seismic data,” University of Western Australia, PhD Thesis.

Conference Abstracts

2025

• Roecker, S., N. Bennington, R. Denlinger, A. Flinders, A. Girard, M. Haney, R. Kramer, G. Lin, D. O’Connell, C. Ruggles and E. Vinarski (2025), “Refined images of the plumbing system beneath the Kīlauea Summit based on the analysis of active and passive seismic data in conjunction with gravity disturbance observations,” AGU Fall Meeting 2025.

• Martin, E.R., D. Chambers, G. Jin, A. Tourei, A.H. Issah, A. Lellouch, S. Yuan, A.J. Girard, D. Zhu, T. Cullison, N. Punithan, T. Snyder, S. Kim, N. Danes, S. Boltz, M. Mendoza, P. Li and Y. Song (2025), “Distributed Acoustic Sensing Data Analysis Ecosystem: DASCore and related Python packages,” AGU Fall Meeting 2025.

• ^†Pandey, A., J.C. Shragge and A.J. Girard (2025), “First-order Control Factors for Ocean-bottom Ambient Seismology Interferometric Observations,” IMAGE, SEG Annual Meeting, Houston, Texas.

• ^†Davis, D., J.C. Shragge, A.J. Girard and S. de Ridder (2025), “Ambient seismic frequency-domain gradiometry,” IMAGE, SEG Annual Meeting, Houston, Texas.

• ^†Pels, M., J.C. Shragge and A.J. Girard (2025), “3-D elastic time-reverse imaging of a void anomaly: A case history,” IMAGE, SEG Annual Meeting, Houston, Texas.

2024

• *Girard, A.J., D. O’Connell, J. Shragge, and M.M. Haney (2024), “Active-source tomography velocity modelling of the Kīlauea summit and surrounding area,” AGU Fall Meeting 2024.

• ^†Tourei, A., D.J.A. Chambers, G. Jin, A.H. Issah, A. Lellouch, E. Martin, A.J. Girard, D. Zhu, S. Yuan, N. Punithan, T. Snyder, N. Danes, S. Boltz, and M. Mendoza (2024), “DASCore: An open-source Python library for distributed acoustic sensing,” AGU Fall Meeting 2024.

• Nakata, R., N. Nakata, A.J. Girard, D.E. Lumley, M. Ichikawa, A. Kato, and Z. Xue (2024), “Time-lapse velocity change monitoring by anisotropic elastic full waveform inversion for CO₂ sequestration at the Nagaoka CCS site,” AGU Fall Meeting 2024.

• *Girard, A.J., J. Shragge, M. Danilouchkine, C. Udengaard, S. Gerritsen (2024), “(Ultra-)low frequency interferometric surface-wave scattering in ambient OBN seismic data,” IMAGE, SEG Annual Meeting, Houston, Texas.

• ^†Pandey, A., J. Shragge, and A.J. Girard (2024), “Ambient crosscorrelation modeling for dense ocean-bottom node arrays: a Gulf of Mexico example,” IMAGE, SEG Annual Meeting, Houston, Texas.

• J. Shragge and A. Girard (2024), “Observations From the Seafloor: Ultra-Low-Frequency Ambient Ocean-Bottom Nodal Seismology From the Gulf of Mexico,” SSA 2024 Annual Meeting.

• ^†D. Chambers, G. Jin, A. Tourei, A.H.S. Issah, A. Lellouch, E. Martin, D. Zhu, A. Girard, S. Yuan, T. Cullison, T. Snyder, S. Kim, N. Danes, N. Punithan, S. Boltz, and M.M. Mendoza (2024), “DASCore: A python library for distributed acoustic sensing,” SSA 2024 Annual Meeting.

2022

• Nakata, R., N. Nakata, A. Girard, M. Ichikawa, A. Kato, D. Lumley and Z. Xue (2022), “Time-lapse crosswell seismic monitoring of CO₂ injection at the Nagaoka CCS site using elastic full waveform inversion,” SEG Technical Program Expanded Abstracts: 802-806.

2021

• *Girard, A.J., J. Shragge, and B. Olofsson (2021), “Identifying salt flanks using low-frequency ambient OBN surface-wave seismology,” SEG Technical Program Expanded Abstracts: 1991-1995. Honorable Mention for Best Paper

2017

• *Girard, A.J. and J. Shragge (2017), “Automated Processing Workflow for Ambient Seismic Recordings,” AGU Fall Meeting, New Orleans, LA.

2016

• *Girard, A.J. and Shragge, J. (2016), “Extracting body waves from ambient seismic recordings,” SEG Technical Program Expanded Abstracts: 2715-2719.

2015

• *Girard, A.J. and J. Shragge (2015), “The utility of extended images in ambient seismic wavefield migration,” AGU Fall Meeting, San Francisco, CA.

2014

• Elapavuluri, P.K., and Girard, A.J. (2014), “Estimating Seismic Uncertainity in Model Space,” 76th EAGE Conference and Exhibition, p.1-5.

2010

• *Girard, A., and Vasconcelos, I. (2010), “Image‐domain time‐lapse inversion with extended images,” SEG Technical Program Expanded Abstracts: 4200-4204.

• *Girard, A., Jie-A-Looi, M., Bakker, J., and Momot, F. (2010), “Searching for a Roman Villa and Prehistoric Flint Mines in Kanton Zürich,” 1st Annual International Geoscience Student Conference, Bucharest, Romania.

Government Reports

1. Shragge, J., A. Girard, H. Flamme, B. Artman, R. Krahenbuhl, J. Bradford, A. Kumar, P. Reppert, R. Hammack, and D. Glaser (2023), “NETL Plastic Pipes Project – Final Report,” DOE/NETL-2023/4327; NETL Technical Report Series; U.S. Department of Energy, National Energy Technology Laboratory: Pittsburgh, PA.

2. Shragge, J., A. Girard, H. Flamme, B. Artman, R. Krahenbuhl, J. Bradford, Y. Li, P. Reppert, R. Hammack, and D. Glaser (2023), “NETL Plastic Pipes Project - June 2022 Progress Report,” United States.

Non-Technical

1. Ore, T., E.R. Martin, I. Rubio-Cisneros, A. Girard, J. Ma, S. Kanakiya, O. Sanuade, A. Titov, and R. de Souza (2023), “Research Committee Update: Hot topics in geophysics: Progress, trends, and perspectives,” The Leading Edge 42: 360–363.

2. Titov, A., Girard, A. and Martin, E. (2021), “Research Committee Update: Working with - and for - early-career researchers,” The Leading Edge 40: 464.

3. *Girard, A. (2020), “Student Zone: Students encouraged to build new regional Challenge Bowls,” The Leading Edge 39: 600.

4. *Girard, A. (2010), “Geophysics: Oh, the places a student can go! one student’s journey,” The Leading Edge 29: 604-605.