Nadine Igonin

Nadine Igonin

Assistant Professor - Geophysics
Tags: seismology Machine Learning Geophysics field geophysics microseismic

Professional Preparation

PhD - Geophysics
University of Calgary, Canada - 2021
BSc - Geophysics
University of Calgary, Canada - 2016

Research Areas

Overview
Seismology research and machine learning applications to earthquakes across Texas, New Mexico, California and Finland. Current projects include earthquake source characterization, mitigation of injection induced seismicity, using near-surface geophysics to study climate change, and geothermal well risk monitoring. Field campaigns in Texas and New Mexico, and opportunities to work with multiple geophysical techniques. 

Publications

Igonin, N., Trugman, D., Gonzalez, K., and Eaton, D., 2023, Spectral characteristics of hydraulic-fracturing induced seismicity can distinguish between activation of faults and fractures. Seismological Research Letters 2023 - publications
Ma, Y., Eaton, D., Igonin, N., and Wang, C., 2023, Machine learning-assisted processing workflow for multi-fiber DAS microseismic data. Frontiers in Earth Science 2023 - publications
Chatterjee, A., Igonin, N., and Trugman, D., 2023, A real-time and data-driven ground motion prediction framework for earthquake early warning. Bulletin of the Seismological Society of America, doi: 10.1785/0120220180. 2023 - publications
Igonin, N., Verdon, J.P., and Eaton, D., 2022, Seismic anisotropy reveals stress changes around a fault as it is activated by hydraulic fracturing. Seismological Research Letters 2022 - publications
Igonin, N., Verdon, J., Kendall, J.M., and Eaton, D., 2021, Large‐scale fracture systems are permeable pathways for fault activation during hydraulic fracturing. Journal of Geophysical Research: Solid Earth 2021 - publications
Atkinson, G., Eaton, D., and Igonin, N., 2020, Developments in understanding seismicity triggered by hydraulic fracturing. Nature Reviews: Earth and Environment 2020 - publications
Poulin, A., Weir, R., Eaton, D., Igonin, N., Chen, Y., Lines, L., Lawton, D., 2019, Focal-time analysis: A new method for stratigraphic depth control of microseismicity and induced seismic events. Geophysics 2019 - publications
Igonin, N., Zecevic, M., and Eaton, D., 2018, Bi-linear magnitude-frequency distributions and characteristic earthquakes during hydraulic fracturing. Geophysical Research Letters 2018 - publications

Appointments

Associate Professor
University of Texas in Dallas [2023–Present]
SAGE Instructor
Summer of Applied Geophysical Research [2022–Present]
https://www.summerofappliedgeophysicalexperience.org
Postdoctoral Fellow
University of Texas at Austin [2021–2023]
Research Assistant
ExxonMobil [2020–2020]

Additional Information

Current Student Research Opportunities
1. Earthquake source properties: Analysis of the relationships between earthquake source type, stress drop, and magnitudes. Focus on developing real-time monitoring strategies for renewable energy initiatives involving injection of fluids into the subsurface. 

2. Earthquake detection and location using nodal arrays in west Texas: We will be collecting a passive seismic dataset in the Delaware basin in west Texas using a nodal array and processing the results to study earthquake nucleation and triggering in high-resolution.

3. Fault mapping in the Permian basin: Using active seismic data to map faults and key structures that are related to present-day seismicity. Focus on understanding the basement rocks and their geomechanical properties. 

4. Hydraulic fracturing and distributed acoustic sensing (DAS): Joint analysis of microseismic data (small earthquakes) and DAS (continuous strain data) to track and interpret hydraulic fracture growth.

5. Magnetotellurics for monitoring fluid injection/withdrawal: Developing applied geophysical methods to monitor fluid propagation at depth, including magnetotellurics, microgravity and magnetics. 

Requirements:
Strong background in mathematics and physics is required, and previous experience in programming is recommended. Applicants with a B.Sc. or M.Sc. degree in Geophysics are preferred. 

If you’re interested, email Nadine Igonin with:

1.  Your CV
2.  Which project you are interested in the most and why

News Articles

Study Maps Stress Changes Around Fault Activated by Hydraulic Fracturing
Map views of monitoring geometry and recorded seismicity. Researchers were able to observe stress changes before and during an earthquake induced by hydraulic fracturing in Alberta, Canada, with the help of a phenomenon called seismic anisotropy.