Seismic Soundoff

“Distributed chemical sensing really is the next frontier in fiber-optic monitoring. It adds a new dimension by directly connecting chemical changes in the environment to signals we can read.” Distributed chemical sensing (DCS) is an emerging technology that utilizes fiber optics to measure chemical changes over long distances in real-time. Authors Christian Totland, Thomas Dylan Mikesell, and Peter James Thomas join host Andrew Geary to discuss their new paper, "Distributed chemical sensing: An unexplored frontier in urban, industrial, and environmental monitoring." Unlike traditional point sensors, which only capture data at one location, DCS has the potential to provide continuous chemical information with both high spatial and temporal resolution. This innovation could transform how we monitor pipelines, groundwater, and industrial sites, while also opening new opportunities for collaboration between geophysics, chemistry, and material science. KEY TAKEAWAYS > DCS can detect leaks, contamination, and chemical changes directly, offering more accurate monitoring than pressure or temperature proxies. > The technology is still in its early stages, which means there are many opportunities for research, innovation, and interdisciplinary collaboration. > If developed further, DCS could provide affordable, real-time monitoring for critical infrastructure and environmental systems worldwide. LINKS * Christian Totland, Thomas Dylan Mikesell, and Peter James Thomas, (2025), "Distributed chemical sensing: An unexplored frontier in urban, industrial, and environmental monitoring," The Leading Edge 44: 598–605. - https://doi.org/10.1190/tle44080598.1 * Learn more about this special section on urban and infrastructure geophysics - https://library.seg.org/doi/10.1190/tle44080587.1 * Listen to Haipeng Li's interview (also from this special section) - https://seg.org/podcasts/episode-271-the-low-cost-seismic-revolution-already-buried-in-your-city/

25 Sep 26min

"By mapping fiber optic cables accurately, we can transform them into dense seismic arrays. This opens the door to city-scale imaging and monitoring." Haipeng Li explains how distributed acoustic sensing (DAS) can turn existing urban fiber optic cables into powerful seismic arrays for near-surface imaging and monitoring. By using everyday traffic and ambient noise, his team can track groundwater changes, detect geohazards, and study fault structures without costly field deployments. This approach offers a new way for geophysicists, engineers, and city planners to work together for safer, more resilient urban environments. KEY TAKEAWAYS > Existing fiber optic cables can be transformed into dense, city-scale seismic arrays using DAS technology. > Vehicle-induced seismic waves provide highly repeatable data for monitoring small subsurface changes, while ambient noise helps extend imaging depth. > Urban DAS monitoring can reveal how infrastructure affects groundwater recharge and can support hazard assessment and infrastructure planning. GUEST BIO Haipeng Li is a third-year Ph.D. candidate in the Geophysics Department at Stanford University, advised by Biondo Biondi in the Stanford Earth Imaging Project (SEP). His research centers on spatiotemporal subsurface monitoring, with a focus on developing efficient and robust time-lapse seismic waveform inversion methods and uncertainty quantification approaches. He applies these techniques to real-world challenges such as geological CO2 sequestration for the energy transition and groundwater monitoring in urban environments, often leveraging Distributed Acoustic Sensing (DAS) data. He is a student member of the AGU, SSA, and SEG. LINKS * Haipeng Li, Jingxiao Liu, and Biondo L. Biondi, (2025), "Near-surface imaging and monitoring enabled by urban distributed acoustic sensing seismic arrays," The Leading Edge 44: 588–597. - https://doi.org/10.1190/tle44080588.1

18 Sep 20min

"The glossary will bridge two complex worlds, geoscience and sustainability, and make them easier to understand." Maria Angela Capello shares her vision for a new glossary that connects geoscience to sustainability in clear, practical terms. She explains how a shared vocabulary can help scientists, educators, and policymakers better understand the purpose and global impact of geoscience work. By linking technical expertise to the UN Sustainable Development Goals, the glossary aims to inspire collaboration, education, and a stronger sense of purpose across the profession. KEY TAKEAWAYS > A dedicated glossary can make sustainability concepts easier to understand and apply in geoscience work. > Geoscientists contribute to all 17 UN Sustainable Development Goals, not just climate-related ones. > Clear, shared language can help connect technical work to education, policy, and public understanding. GUEST BIO Maria Angela Capello (MAC) is a global leader in the energy sector, championing sustainability, equity, and diversity. An active collaborator with the United Nations and major geoscience societies, she has been honored with Italy’s Star of Italy knighthood and UNESCO recognition for advancing the UN Sustainable Development Goals. A sought-after speaker and author of three books, MAC is the only person to serve as a Distinguished Lecturer for AAPG, SPE, and SEG. She advises on sustainability, ESG, and leadership worldwide, with certifications from Cambridge University and IFP School. LINKS * Read "The Geophysical Sustainability Atlas: Mapping geophysics to the UN Sustainable Development Goals" - https://doi.org/10.1190/tle40010010.1 * K-12 Resources - https://education.americangeosciences.org/resources * Practical Geocommunication for the American Geosciences Institute - https://training.geologize.org/pages/agi

11 Sep 28min

For this episode, we’re re‑releasing one of the most powerful stories we’ve ever told - a complete listening experience that transports you to one of the most remote and challenging places on Earth. Searching for Water in Kakuma takes you inside the second‑largest refugee camp in the world, home to more than 185,000 people and still growing. There, a team of Canadian geophysicists joined forces with determined refugees and locals to take on a life‑or‑death challenge: finding safe, sustainable water for tens of thousands in East Africa. This episode offers an unflinching look at the obstacles, breakthroughs, and human resilience at the heart of applied geophysics. If you’re new to Seismic Soundoff, we’re glad you’ve chosen to listen. This podcast shares stories that connect geoscience to real‑world impact - from breakthrough research and innovative technology to the people applying them to solve Earth’s toughest challenges. Starting September 11, we’ll release three brand‑new interviews every week, bringing you fresh voices and powerful stories from across the geoscience community. For now, please enjoy this deeply personal and meaningful story. For show notes - including a full transcript, photos, and links to explore the Kakuma water project and Paul Bauman’s work - visit seg.org/podcast/Post/6368. To listen to other GWB podcasts, visit https://seg.org/podcast_tag/geoscientists-without-borders/. GEOSCIENTISTS WITHOUT BORDERS® Get involved with Geoscientists without Borders! Visit the GWB website at https://seg.org/gwb to learn about funded projects, donate, or apply to lead a project. Whether you are a student, researcher, or industry professional, your skills and support can make a significant difference. SPONSOR Schlumberger strives to be a unifying force for social and environmental stewardship, and engages in philanthropic activities that reflect the company’s values. As the founding sponsor of Geoscientists Without Borders®, Schlumberger believes in the science of geophysics to effect positive changes in communities facing environmental hardship and natural hazards. INTERVIEWS Paul Bauman, Landon Woods, Erin Ernst, Doug MacLean, Franklin Koch, Brendan O’Brien, Alastair McClymont Music in the episode courtesy of Epidemic Sound. Additional sound was provided by Brendan O’Brien. This episode was hosted, edited, and produced by Andrew Geary. Thank you to the SEG podcast team - Jennifer Crockett, Beth Donica, Ally McGinnis, Mick Swiney, and Adrienne White, as well as SEG staff Katie Burk and Linda Ford.

4 Sep 43min

Karelia La Marca shares how her passion for geophysics has taken her from the classroom to exciting fieldwork around the world. She offers an encouraging tip for first-timers while explaining the skills and teamwork that make science stronger. Get a front-row seat to the conversations shaping the geosciences. Inside IMAGE is a special series from Seismic Soundoff, SEG’s flagship podcast hosted by Andrew Geary, now in its 10th year. This limited-edition series takes you behind the scenes of IMAGE, the premier geoscience event, with exclusive interviews and in-depth discussions. Learn more at https://www.imageevent.org/.

28 Aug 16min

Bill shares how reconnecting with colleagues fuels collaboration and why sustainable energy means balancing oil, gas, and new sources to meet global needs. He discusses progress in reducing carbon impact, the urgent need to attract top talent, and takes pride in contributing to technologies that shape everyday life. Get a front-row seat to the conversations shaping the geosciences. Inside IMAGE is a special series from Seismic Soundoff, SEG’s flagship podcast hosted by Andrew Geary, now in its 10th year. This limited-edition series takes you behind the scenes of IMAGE, the premier geoscience event, with exclusive interviews and in-depth discussions. Stay connected at www.imageevent.org/.

28 Aug 8min

Adriana reflects on the power of connection across science, industry, and academia, as well as the importance of listening to the needs of its members. She explores how geoscientists can expand into new energy solutions, support students’ career paths, and use storytelling to engage the public and strengthen the community’s impact. Get a front-row seat to the conversations shaping the geosciences. Inside IMAGE is a special series from Seismic Soundoff, SEG’s flagship podcast hosted by Andrew Geary, now in its 10th year. This limited-edition series takes you behind the scenes of IMAGE, the premier geoscience event, with exclusive interviews and in-depth discussions. Stay connected at https://www.imageevent.org/.

28 Aug 21min

Get a front-row seat to the conversations shaping the geosciences. Inside IMAGE is a special series from Seismic Soundoff, SEG’s flagship podcast hosted by Andrew Geary, now in its 10th year. This limited-edition series takes you behind the scenes of IMAGE, the premier geoscience event, with exclusive interviews and in-depth discussions. Geoscientist Lars Koehn shares how his journey from student to young professional fuels his passion for clean energy and carbon storage. He reflects on the power of networking, mentorship, and collaboration at IMAGE, where new technologies and ideas shape the future of geoscience. And it's not too late to join the event driving innovation in Earth science. Learn more at https://www.imageevent.org/.

27 Aug 18min