“Oil company management has to understand that its business is essentially a technology business. It's not a marketing business.”

In this episode of Seismic Soundoff, Andrew Geary speaks with Dr. Leon Thomsen about his memoir, “‘Surely You’re Joking, Mr. Thomsen!’: Adventures of a Petroleum Scientist,” and a career that helped redefine applied geophysics.

Leon reflects on the experiences that shaped his scientific mindset, from early exposure to field crews, to formative lessons in geology at Caltech, to decades of research in academia and industry. He explains how curiosity-driven exploration led him to recognize the importance of seismic anisotropy and shear-wave technology, work that ultimately carried trillion-dollar implications for hydrocarbon exploration.

The conversation also explores why transformative ideas often struggle inside large organizations, how a lack of technological literacy in management can lead to missed opportunities, and why applied science can be every bit as creative and demanding as pure research.

Looking ahead, Leon shares his perspective on the future of applied geophysics, including opportunities in fracking optimization, carbon sequestration monitoring, and subsurface hydrogen exploration, and offers encouragement to young scientists preparing to navigate the energy transition.

KEY TAKEAWAYS

> Energy is a technology business: Long-term success depends on leadership that understands and trusts science, not just short-term metrics.

> Applied science is real science: Solving practical problems can be as intellectually challenging and rewarding as purely theoretical work.

> The next frontier is subsurface innovation: Geophysics will play a critical role in fracking efficiency, CO₂ monitoring, and hydrogen exploration during the energy transition.

LINKS

* Buy Leon's memoir - https://seg.org/shop/product/?id=fe4953e4-cc89-f011-b4cb-7c1e527dc295

* Buy his previous book, "Understanding Seismic Anisotropy in Exploration and Exploitation" - https://pubs.geoscienceworld.org/seg/books/book/1042/Understanding-Seismic-Anisotropy-in-Exploration

* Read Leon's award-winning article: "A logical error in Gassmann poroelasticity" - https://www.earthdoc.org/content/journals/10.1111/1365-2478.13290

ABOUT SEISMIC SOUNDOFF

Seismic Soundoff showcases conversations addressing the challenges of energy, water, and climate. Produced by the Society of Exploration Geophysicists (SEG) and hosted by Andrew Geary of 51 features, these episodes celebrate and inspire the geophysicists of today and tomorrow. Three new episodes monthly. See the full archive at https://seg.org/resources/podcast/.

“Latin America doesn't just belong in SEG; it can help shape SEG's future. And SEG, in turn, can help shape a more connected and innovative future for geoscience in our region.”

Fernanda Hermes, SEG's Latin America Market Development & Engagement Manager, shares how Latin America is becoming a key contributor to global geophysics through its geological diversity, energy transitions, and active student communities. She explains how local partnerships and regional presence help SEG better support members and expand opportunities. Her insights show a region full of talent, ambition, and momentum for the next decade of applied geophysics.

KEY TAKEAWAYS

> Latin America is central to emerging sectors such as geothermal, CCS, critical minerals, and near‑surface studies.

> Strong student chapters and local societies are driving community, visibility, and professional growth.

> SEG’s regional presence builds trust, strengthens partnerships, and opens new opportunities for collaboration.

GUEST BIO

Fernanda Hermes holds a degree in geophysics from Fluminense Federal University (UFF) and is currently completing her Master's degree in Ocean and Earth Dynamics with a focus on onshore seismic data processing at GISIS/UFF. Fernanda previously volunteered with SEG as Marketing Director (2021-2023) of the Geoscientific Student Chapter (GSS-SEG). Fernanda is passionate about innovation, collaboration, and continuous learning.

RELATED LINKS

* Connect with Fernanda on LinkedIn at https://www.linkedin.com/in/fernanda-clara-hermes/.

* Read President’s Page: SEG’s renewed focus in Latin America by Jim White at https://doi.org/10.1190/tle44110822.1.

ABOUT SEISMIC SOUNDOFF

Seismic Soundoff showcases conversations addressing the challenges of energy, water, and climate. Produced by the Society of Exploration Geophysicists (SEG) and hosted by Andrew Geary of 51 features, these episodes celebrate and inspire the geophysicists of today and tomorrow. Three new episodes monthly. See the full archive at https://seg.org/resources/podcast/.

“Models are still the bread and butter in gravity and magnetics interpretation. Interpreters still have to condition the data properly, and that's half technical, half art.”

Betty Johnson shares how her early career in gravity and magnetics grew from curiosity, hands‑on learning, and rapidly changing technology. She explains how potential field methods remain valuable for addressing energy, water, and climate challenges because they are affordable, scalable, and deeply rooted in Earth’s history. Her reflections underscore the importance of high-quality data, solid fundamentals, and ongoing learning.

KEY TAKEAWAYS

> Gravity and magnetics remain essential because they are cost‑effective, scalable, and useful across many energy and environmental applications.

> Strong fundamentals in physics, geology, and modeling help interpreters make better decisions and collaborate across disciplines.

> Good data, field experience, and continuous learning are critical for building a long and impactful geophysics career.

LINKS

* Read "The Meter Reader—The tools of the trade in gravity and magnetics, 1978–1988" at https://doi.org/10.1190/tle44090738.1

* Elizabeth A. Johnson, "Gravity and magnetic analyses can address various petroleum issues" at https://doi.org/10.1190/1.1437844

* Elizabeth A. E. Johnson, "Use higher resolution gravity and magnetic data as your resource evaluation progresses" at https://doi.org/10.1190/1.1437846

THIS EPISODE SPONSORED BY STRYDE

STRYDE enables high-resolution subsurface imaging that helps emerging sectors such as CCS, hydrogen, geothermal, and minerals de-risk and accelerate exploration - delivered through the industry’s fastest, most cost-efficient, and agile seismic solution. Discover more about STRYDE at https://stryde.io/what-we-do.

ABOUT SEISMIC SOUNDOFF

Seismic Soundoff showcases conversations addressing the challenges of energy, water, and climate. Produced by the Society of Exploration Geophysicists (SEG) and hosted by Andrew Geary of 51 features, these episodes celebrate and inspire the geophysicists of today and tomorrow. Three new episodes monthly. See the full archive at https://seg.org/resources/podcast/.

“Your nomination might be the only way their work is recognized at the level it deserves. The Honors and Awards program is powered by our members and only succeeds when we take the time to lift up one another.”

Maurice Nessim explains why SEG Honors and Awards are essential for recognizing scientific, professional, and social contributions in applied geophysics. He shares how member nominations ensure a diverse and meaningful set of candidates and encourages everyone to participate before the January 1 deadline. He also highlights the value of attending the IMAGE ’26 ceremony to celebrate the awardees and learn from their achievements.

Nominate a colleague by 1 January, 2026 at https://seg.org/resources/honors-and-awards/.

KEY TAKEAWAYS

> SEG Honors and Awards rely on member nominations to recognize impactful scientific, professional, and humanitarian contributions.

> Recognition strengthens careers, elevates organizations, and encourages innovation across applied geophysics.

> Attending the IMAGE ’26 ceremony supports awardees and helps the community learn from their work.

GUEST BIO

Maurice Nessim is the Founder, CEO, and Chairman of Greener Cleaner Cooler Globe and currently serves as Chair of the SEG Honors and Awards Committee. He brings several decades of leadership in earth science and energy, applying that expertise to advance medical imaging through his work with Ultrasound Associates. His career includes serving as a Board Director at TGS, where he guides strategy and innovation across the geoscience and energy sectors. With more than thirty years in geophysics, he has consistently championed excellence and forward‑looking solutions. His work reflects a deep commitment to using scientific progress for societal benefit.

Complete show notes at https://seg.org/podcasts/episode-280-the-awards-that-shape-geophysics-and-why-they-need-you/.

ABOUT SEISMIC SOUNDOFF

Seismic Soundoff showcases conversations addressing the challenges of energy, water, and climate. Produced by the Society of Exploration Geophysicists (SEG) and hosted by Andrew Geary of 51 features, these episodes celebrate and inspire the geophysicists of today and tomorrow. Three new episodes monthly. See the full archive at https://seg.org/resources/podcast/.

"Sustainability is about reliance and resilience. Our focus needs to be on how systems remain reliable over time."

Céline Gerson shares how Fugro is reshaping its business to focus on resilience, adaptability, and sustainability. She explains the importance of critical minerals, coastal resilience, and digital transformation for the future of geophysics. Her insights highlight how innovation, respect, and collaboration can help geoscientists succeed in a rapidly changing world.

KEY TAKEAWAYS

> Innovation often emerges during times of crisis, and companies can use downturns to launch new technologies and approaches.

> Applied geophysics plays a direct role in climate resiliency projects, from strengthening coastal infrastructure to modeling storm surge impacts.

> Transparency about data limitations and involving diverse teams in decision-making strengthens risk management and builds trust in geoscience recommendations.

GUEST BIO

Céline Gerson is the Group Director Americas at Fugro and President of Fugro USA. With over 25 years of experience, Céline has a proven record of successfully growing complex technical businesses across various industries. Before joining Fugro, Céline served as Vice President, Global Account Director for Schlumberger. She was particularly focused on energy transition, sustainability, and digital transformation. Before that, she was President of Schlumberger Canada. Along with being a Harvard Business School Alumna, Céline holds a Bachelor’s degree from the European University of Brussels and a Juris Doctorate from the University of Houston.

THIS EPISODE SPONSORED BY STRYDE

STRYDE enables high-resolution subsurface imaging that helps emerging sectors such as CCS, hydrogen, geothermal, and minerals de-risk and accelerate exploration - delivered through the industry’s fastest, most cost-efficient, and agile seismic solution. Discover more about STRYDE at https://stryde.io/what-we-do.

ABOUT SEISMIC SOUNDOFF

Seismic Soundoff showcases conversations addressing the challenges of energy, water, and climate. Produced by the Society of Exploration Geophysicists (SEG) and hosted by Andrew Geary of 51 features, these episodes celebrate and inspire the geophysicists of today and tomorrow. Three new episodes monthly. See the full archive at https://seg.org/resources/podcast/.

"Sometimes the traditional methods are way more effective or efficient in handling certain things. To succeed in this new paradigm, we need to build on our strong fundamentals and progress further."

Ivan Lim Chen Ning shares how data-driven methods are reshaping geophysics by challenging traditional workflows and opening new possibilities. He highlights the role of AI, machine learning, and fiber-optic sensing in improving seismic interpretation, imaging, and monitoring. His insights show how combining strong fundamentals with modern digital tools can help geophysicists solve problems more effectively.

Read the September issue of TLE about data-driven geophysics at https://library.seg.org/toc/leedff/44/9.

KEY TAKEAWAYS

> AI and data-driven tools open new paths. They help geophysicists move beyond traditional workflows to find faster and simpler solutions.

> Fiber-optic sensing changes monitoring. DAS provides continuous well data, replacing point sensors and revealing signals directly.

> Strong fundamentals still matter. Success comes from combining proven geophysical methods with modern digital skills.

GUEST BIO

Ivan Lim Chen Ning is an Earth Scientist – Fiber Optics at Chevron, where he analyzes Distributed Fiber Optic Sensing (DFOS) data and develops real-time algorithms for field applications. He applies deep learning and signal processing to improve DFOS workflows, advancing distributed acoustic sensing in the energy industry. A member of Chevron’s Emerging Leader 2024 cohort, Ivan is recognized for solving cross-disciplinary challenges and driving innovation to help secure energy for the future.

"The applications of drones in geophysics have increased dramatically in the last 10 years. Drones can be said to be an established platform for geophysical measurement methods."

Drones have quickly moved from experimental tools to essential platforms in geophysics. Johannes Stoll explains how advances in sensor miniaturization, AI navigation, and regulatory clarity are enabling wide-area surveys that deliver better data at lower costs. He highlights how collaboration across disciplines and countries is driving innovation, opening new opportunities for energy transition projects and subsurface modeling.

KEY TAKEAWAYS

> Drones are now established tools for geophysical surveys, especially in magnetics and electromagnetics.

> Sensor miniaturization and AI navigation are enabling wider, more precise, and cost-effective measurements.

> Collaboration between industry, academia, and government is critical to advancing drone-based geophysics.

LINKS

* UAVs and Drones in Geophysics (1-3 December 2025): Read the summit topics, technical program, explore the virtual showcase information, register to attend, and more at https://seg.org/calendar_events/uavs-and-drones-in-the-geophysics/.

GUEST BIO

Dr. Johannes Stoll is the founder and CEO of Mobile Geophysical Technologies (MGT). With a background in geophysics and electrochemistry, he has held multiple roles across the Oil & Gas industry as well as in leading research institutions. Bringing more than 30 years of experience as an active exploration geophysicist, Dr. Stoll combines scientific expertise with entrepreneurial vision to drive innovation in mobile geophysical solutions.

"Geophysics plays a central role in this energy transition because it provides the tools and insights needed to understand, manage, and optimize subsurface resources. These resources are critical for both traditional and renewable energy systems."

Geophysics is essential for geothermal energy, carbon storage, hydrogen storage, and critical minerals. Joël Le Calvez and Erkan Ay explain how methods like multi-physics workflows and distributed acoustic sensing are improving reliability, scalability, and safety. They also highlight the skills and mindset geophysicists need to succeed in a rapidly changing energy landscape.

Read the October issue of The Leading Edge that features a special section about geophysics for new energies at https://library.seg.org/toc/leedff/44/10.

KEY TAKEAWAYS

> Geophysics provides the foundation for safe, efficient, and scalable use of subsurface resources in the energy transition.

> Multi-physics workflows and DAS technologies reduce uncertainty and improve monitoring of geothermal and storage projects.

> Future geophysicists must combine technical expertise with adaptability, collaboration, and field experience.

GUEST BIOS

Joël Le Calvez is Principal Geologist at SLB, where he develops software for processing, visualization, and interpretation of microseismic monitoring data. His work supports applications ranging from hydraulic fracture treatment to CO₂ sequestration and geothermal injection, using downhole, shallow wellbore, and surface arrays. Before joining SLB, Joël contributed to research at the Bureau of Economic Geology’s Applied Geodynamics Laboratory and at Etudes et Recherches Géotechniques. He holds a Ph.D. in salt tectonics, an M.Sc. in geosciences, and a B.Sc. in physics.

Erkan Ay is an accomplished geophysicist with more than 18 years of international experience across oil and gas, carbon capture and storage, and academic research. He is recognized for advancing techniques in microseismic monitoring, DAS, 4D VSP, and seismic-while-drilling. Erkan’s work integrates seismology and petrophysics to better characterize complex subsurface structures. Currently, Erkan serves as Chair of the SEG Research Committee and Vice Chair of the SEG IMAGE 2026 Technical Committee, guiding collaborative efforts to advance geophysics for sustainable energy solutions.

"Generative modeling is a game-changer. We can now capture high-dimensional statistics that we could never have captured in the past."

Felix Herrmann explains how digital twins and generative AI are reshaping subsurface geophysics. He highlights the importance of open-source tools, multimodal data, and uncertainty-aware models for better decision-making in energy and storage projects. By combining physics with AI, his work shows how geophysics can move beyond silos and create more reliable and efficient solutions.

KEY TAKEAWAYS

> Digital twins informed by multimodal data can reduce uncertainty and improve reservoir management.

> Open-source tools and agreed benchmarks are essential for accelerating innovation in geophysics.

> Combining physics-based models with generative AI creates robust, practical solutions for complex subsurface challenges.

Read Felix's article in The Leading Edge, "President's Page: Digital twins in the era of generative AI," at https://doi.org/10.1190/tle42110730.1.

GUEST BIO

Felix J. Herrmann earned his Ph.D. in engineering physics from Delft University of Technology in 1997, followed by research appointments at Stanford and MIT. He later joined the University of British Columbia faculty in 2002 and moved to the Georgia Institute of Technology in 2017, where he is the Georgia Research Alliance Scholar Chair in Energy with cross-appointments across multiple schools.

Dr. Herrmann leads a cross-disciplinary research program in computational imaging, spanning seismic and medical applications, and is recognized for innovations in machine learning, optimization, and high-performance computing that have reduced costs in seismic data acquisition and imaging. A past SEG Distinguished Lecturer and recipient of the SEG Reginald Fessenden Award, he directs the Seismic Laboratory for Imaging and Modeling and co-founded the Center for Machine Learning for Seismic (ML4Seismic) to advance AI-assisted seismic imaging and reservoir monitoring through industry collaboration.

"South America is a region with great potential in terms of energy transition, mining, and geothermal. I would like to be part of the next major discoveries in critical minerals and contribute to new technologies for future generations."

Ana Curcio shares her journey from academia to industry and highlights the growing role of geophysics in South America’s energy and resource development. She explains the challenges of lithium brine exploration, the promise of geothermal energy, and the importance of connecting geophysics with engineering. Her insights show how geophysicists can play a key role in sustainable resource management and the energy transition.

Read her article, "President's Page: Resources and geophysical opportunities in South America," on the SEG Library at https://doi.org/10.1190/tle41040228.1.

For a continuing conversation on geophysics in Latin America, listen to episode 282 - https://seg.org/podcasts/episode-282-how-latin-america-is-shaping-the-next-era-of-geophysics/.

KEY TAKEAWAYS

> Geophysics must integrate with engineering to move exploration into production and add value to resource development.

> Lithium brine and geothermal exploration in South America present both technical challenges and major opportunities for innovation.

> Building stronger geophysical capacity in Latin America requires investment, education, and closer collaboration with local societies.

GUEST BIO

Ana Curcio is a Consultant at Proingeo SA and Professor at Buenos Aires University. She earned a Doctor of Engineering and has more than 15 years of experience in hydrocarbons, lithium, and mining. A former SEG Director-at-Large, she has held multiple leadership roles within SEG and currently serves on the board of the Argentinean Association of Petroleum Geologists and Geophysicists. Ana specializes in multiphysics integration for reservoir monitoring, brine prospecting, and anisotropy studies. She is fluent in Spanish, English, Portuguese, and Chinese.

ABOUT SEISMIC SOUNDOFF

Seismic Soundoff showcases conversations addressing the challenges of energy, water, and climate. Produced by the Society of Exploration Geophysicists (SEG) and hosted by Andrew Geary of 51 features, these episodes celebrate and inspire the geophysicists of today and tomorrow. Three new episodes monthly. See the full archive at https://seg.org/resources/podcast/.