Category: Research

Geophysics in Action: Katie Bristol’s Alumni Journey

Meet Katie Bristol, an innovative mind in geophysics who began her journey at Michigan Tech, earning a BS and MS before pursuing a PhD and conducting fieldwork in India and Montana. Now a postdoctoral researcher at Purdue, Katie reflects on her time as a Husky, shares career insights, and offers advice for the next generation of MTU students. Read on to explore the Q&A session with Katie.

Katie observed the active Whakaari / White Island volcano crater in New Zealand.

Katie Bristol, BS Applied Geophysics ‘18, MS Geophysics ’20, Michigan Tech University
Advised by: Aleksey Smirnov

Ph.D. Geophysics, University of Florida, 2024

Katie’s publications.

Q: Why did you choose MTU?
A: I came to MTU as a high school student attending Summer Youth Programs and absolutely fell in love with the area. I felt like I had left a piece of my heart in the Keweenaw and knew I had to go back! 

Q: What has your career path been like since you graduated?
A: After getting my BS and MS at MTU, I received my PhD from the University of Florida. During my PhD, I got to do fieldwork in India, and I even got to help excavate dinosaur bones in Montana! Because my Summer Youth Programs (SYP) experience impacted me both as an attendee and an instructor, I have continued to work in outreach in Florida. I help run outreach events at the Florida Museum of Natural History and am a Visiting Scientist for Scientists in Every Florida School. After PhD, I received a job offer at Purdue University, where I will be working as a postdoctoral researcher starting in January 2025.

Q: How did your time at MTU prepare you for your career?
A: My coursework and research experience at MTU gave me the skills to be a critical thinker and a problem solver, which employers highly value.

Excavation of a Triceratops in Montana, USA.

Q: What’s it like to return to the campus now? Have you noticed any changes?
A: While the campus has changed slightly with the new Health STEM building, it still feels like a home away from home. I love to stop in, say hi to Brittany, and chat with professors – sometimes, we even catch up at the KBC!

Drilling paleomagnetic cores in the Deccan Traps of Maharashtra, India.

Q: What is the most impactful memory of your time here?
A: Getting to do fieldwork in areas ranging from the Precambrian midcontinent rift (in MTU’s backyard) to active volcanoes and glaciers (field camp through Frontiers Abroad).

Q: What is your favorite activity when you return to campus?
A: I love getting coffee from KCW, hiking waterfalls, and searching for beach agates!

Q: What advice would you give someone starting at Tech as a Husky?
A: Get involved with undergraduate research, explore the Keweenaw, and attend office hours!

Mapping geomorphologic features in Castle Hill, New Zealand (where Narnia was filmed!).

Q: What role did the community or extracurricular activities play in your overall experience?
A: The close-knit MTU community and surrounding area are truly unmatched. At MTU, you’re not just a number – everyone knows each other and looks out for one another.

Q: Did you have on-campus employment while a student? If yes, what did you do?
A: I worked as a research assistant in the MTU Paleomagnetism Laboratory with Dr. Aleksey Smirnov. During this time, I did fieldwork, sample preparation, and measurements in the lab, which prepared me for graduate school and my career in research.

Kayaking to islands in Lake Superior to search for Precambrian dikes to sample for paleointensity study.

Dr. Radwin Askari: Pioneering Geophysics Research and Education at Michigan Tech

Dr. Askari

Dr. Radwin Askari, Associate Professor in the Department of Geological and Mining Engineering and Sciences (GMES) at Michigan Tech, is a geophysicist at the forefront of environmental geophysics and energy transition research. His innovative work focuses on understanding fluid transport in geological settings and its geophysical signatures, including volcanic tremors and long-period events. As the founder of Michigan Tech’s state-of-the-art Physical Modeling Laboratory (PML) in Dow 622, Dr. Askari leads pioneering research on environmental geophysics, fracture dynamics and its induced seismicity, and geological hydrogen. His lab is equipped with advanced technologies such as acoustic velocity, low permeability, ultrasonic, and high-speed imaging systems, providing students with exceptional opportunities for hands-on learning.

Dr. Askari fosters a diverse and inclusive research environment, welcoming students from all backgrounds to contribute to groundbreaking work that impacts environmental conservation and the global energy transition. He is also a recipient of the prestigious NSF CAREER award, further highlighting his commitment to both research and education. Join Dr. Askari at Michigan Tech, where you can be part of transformative research addressing some of the world’s most pressing challenges in geophysics and energy.

Dr. Askari directs the Earth Explorers Computer Lab (EECL) Dow 619. A multifunctional hub, EECL supports GMES students’ research, coursework, and senior projects with high-performance workstations, specialized software, and access to Michigan Tech’s computing cluster. It also features a TV screen and videoconferencing equipment and serves as a classroom and meeting space, all within a refreshed and collaborative environment.

Dow 619 Earth Explorers Computer Lab (EECL)

Since Dr. Askari joined in 2015, GMES has benefited from his expertise, which he has since taught courses such as Fundamentals of Geophysics, Computational Geosciences, Environmental and Engineering Geophysics, Reflection Seismology, Formation Evaluation and Petroleum Engineering, Advanced Engineering and Engineering Geophysics, and Advanced Reflection Seismology. Be sure to check out the educational videos Dr. Askari creates and shares on his YouTube channel!

Are you ready to explore groundbreaking research and hands-on learning? mtu.edu/apply

Breeanne Heusdens, Fletcher McGuire ‘22, Olivia Salvaggio ‘22, Sananda Ray, Nontawat Srisapan, Radwin Askari

Leading the Charge in Climate Science: Join Dr. Xin Xi at Michigan Tech

Dr. Xin Xi is excited to mentor and collaborate with the next generation of scholars.

Dr. Xin Xi is at the forefront of climate science, and Michigan Tech offers the chance to be part of his transformative work. Focusing on the life cycle of atmospheric aerosols and their far-reaching impacts on ecosystems, air quality, and climate, Dr. Xi tackles critical global challenges such as desertification and air pollution through remote sensing, in situ measurements, and advanced modeling techniques.

Dr. Xi and his team address pressing environmental and human health issues by combining cutting-edge research with innovative approaches. Supported by prestigious grants, including NASA’s LCLUC program, Dr. Xi’s work is shaping the future of climate science and inspiring the next generation of problem-solvers.

Going back to the vault, in this MTU research blog, Dr. Xi explains how airborne dust aerosols impact the Earth in various ways and shares how he believes the surface synoptic observations have not yet been used to their full potential, leading him to develop a unified dust-climate data record.

Since joining Michigan Tech, Dr. Xin Xi has significantly contributed to geoscience education, teaching advanced geoinformatics courses, introduction to GIS, and Python programming for geosciences. His Geoinformatics Graduate Certificate is widely recognized for its excellence and relevance in preparing students for the demands of modern geospatial research and industry applications.

Join Michigan Tech, where Professor Xi leads, and you excel.

MTU campus viewed from across the frozen snow-covered canal.
Michigan Technological University campus as viewed from across the frozen Portage canal.

Ask and Answer with GMES Student Sananda Ray, Ph.D. Geophysics, 2025

GMES Student Spotlight Q&A:
Sananda Ray, Ph.D. Geophysics, 2025
Home City: Cooch Behar, INDIA
Advisor: Dr. Radwin Askari

Sananda’s publications.

Sananda Ray is pictured with Volcán de Fuego, Guatemala, in the summer of 2022 when she had an opportunity to join the field group led by Dr. Greg Waite and geology Ph.D. candidate Gustavo Bejar Lopez.

Get to know our students. Sananda Ray is a Graduate Research Assistant. She loves photography (she took the image of the Northern Lights!), traveling, family, friends, and volcanoes, to name a few. Her favorite class so far at MTU has been Volcanic Seismology with Dr. Greg Waite. Sananda says the best place to eat off-campus is the Ambassador. She has excellent taste in pizza and graduate programs!

Q: Why did you choose to attend MTU?

A: When looking for PhD positions, the program and the project aligned with my research goals. 

Q: Do you have a favorite class or professor so far?

A: Dr. Greg Waite and Volcanic Seismology.

Q. What is your research about?

A: My research focuses on experimental geophysics. I generate and analyze long-period events—commonly observed in volcanoes—using a controlled laboratory setup to bridge the gap between theoretical models and real-world geological observations.

Q: What is your favorite off-campus place to eat? 

A: The Ambassador in downtown Houghton.

Sananda Ray is pictured presenting her research poster at the American Geophysical Union (AGU) Fall Meeting in 2023.
Sananda photographed the Northern Lights over the Portage Canal.

Preserving Historic Copper Mining Records

Boxes of historical data ready to join the digital era.

Preserving historic copper mining records is at the heart of an exciting new project at Michigan Tech! Led by James DeGraff, GMES Research Professor, a team of researchers has secured $118,898 in matching grant funding from the National Park Service (NPS) to archive records through advanced digitization.

Titled “Preservation, Indexing, and Enhanced Utility of Historic Copper Mining Drill Hole Records,” the project is part of the NPS Save America’s Treasures Grant Program, which is dedicated to safeguarding the nation’s cultural heritage. Established in 1988 to celebrate America’s premier cultural resources, Save America’s Treasures grants this year funded 59 projects through the Historic Preservation Fund that will preserve nationally significant sites and historical collections in 26 states and the District of Columbia.

The team will digitize and organize records from over 650 drill holes from 1899 to 1970, creating an interactive map that will be accessible to the public. Copper mining on the Keweenaw Peninsula dates back more than 8,000 years, but an influx of miners in the 1800s—spurred by technological advances and rising demand for copper—made the region a hotbed of activity.

Man stands on dock with stacked copper ingots. A nearby sign reads, “This copper for shipment.” Photo courtesy of Michigan Tech Archives 2017.

Congratulations to DeGraff and his co-investigators—Lindsay Hiltunen (VPOL), Don Lafreniere (SS/GRF), and Erika Vye (GLRC)—on this impactful initiative! The copper mining records hold significant historical and scientific value. They showcase the evolution of drilling technology and geology while contributing to current efforts to secure critical minerals from domestic sources.

Diamond Drill Hole Records

Meet Professor Shiliang Wu

Professor Wu

Discover the fascinating work of Professor Shiliang Wu, a leading expert in atmospheric chemistry and air quality at Michigan Tech! As a key faculty member in the Departments of Geological and Mining Engineering & Sciences and Civil, Environmental, and Geospatial Engineering, Professor Wu conducts groundbreaking research at the intersection of air quality, climate, wildfires, and ecosystems. He maps the global journey of air pollutants through sophisticated computer modeling, revealing their impact on our environment and health. Take advantage of this opportunity to dive into the science driving cleaner air and a healthier planet!

Figure 1 shows a comprehensive global view of arsenic levels in surface air for 2005. This map integrates sophisticated modeling with measurement data from monitoring stations worldwide, clearly depicting annual average arsenic concentrations. Color gradients represent background arsenic levels, while station locations are marked by circles, directly comparing model predictions and field data. This visualization underscores the global distribution of arsenic in the air, highlighting critical areas of environmental health concern and bridging scientific modeling with real-world impacts.

Figure 1. Arsenic concentrations in surface air. Model-simulated annual (for the year 2005) mean arsenic concentrations in ambient air (background) compared with measurement data at various stations (circles) around the world.

GMES Student Spotlight Q&A: Aimee Zimmerman, PhD Geophysics 2027

GMES Student Spotlight Q&A: Aimee Zimmerman, MS Geophysics 2024, PhD Geophysics 2027
Hometown:
Mill Hall, Pennsylvania

After finding a strong sense of belonging, Aimee Zimmerman relocated to Michigan Tech to pursue her Master of Science in Geophysics in 2022. Two years later, her passion for her research led her to continue her academic journey, and she is now working toward a Ph.D. with graduate student advising from Dr. Greg Waite. Aimee wants to know how an earthquake stresses a volcanic eruption. She monitors volcanic activity worldwide using thermal satellite imaging to determine if earthquakes and seismic activity can tell us something about volcanoes. She offers her perspectives on MTU below. 

Popocatépetl is one of the volcanoes Aimee is studying.

Q: Why did you choose to attend MTU?

A: I visited in the spring of 2022, and it immediately felt like home. The community was so welcoming and generous. I attended MTU for my Masters degree and was allowed to continue my education. I decided to stay for my PhD and continue the research I started in my Masters

Q: Do you have a favorite class or professor so far?

A: I have thoroughly enjoyed taking classes on natural hazards and their social dynamics. Learning about the discrepancies in dealing with hazards and how we can mitigate disasters has been extremely helpful. 

Q: Are you in any clubs or groups on campus?

A: I am a part of InterVarsity, a Christian student organization. I lead a small group discussion with other graduate students

Q: What advice would you give to a future Husky?

A: Don’t solely exist to do homework and take exams. College is so much more than just classes, so get involved and branch out. Say yes to things, and you never know who you’ll meet or what you’ll get to experience

Q: What local activities do you enjoy outside of MTU?

A: I love to go rock hunting when the weather is nice. I have a rock tumbler, so finding rocks that polish nicely is always fun. I also love to volunteer for things involving my church. I am involved in the children’s ministry, so I get to spend time every week with pre-schoolers as they learn more about God 

Q: What is your favorite on-campus place to eat? Off-campus?

A: The cafe in the library has amazing coffee, and the yogurt parfaits are also great. Off-campus, my favorite is The Ambassador. The pizza is my favorite up here, and they have such a fantastic atmosphere

Q: How do you survive winter?

A: I love to read, so cozying up on my couch with a good book and a cup of tea is the only way I get through the cold nights. I also love going to hockey games, which makes weekends super fun.

Q: Have your post-graduation plans changed since coming to MTU? If so, how and why?

A: Yes. I never considered going into teaching at the college level, but I was given the opportunity to be a teaching assistant for an introduction to geology lab. I loved seeing the students grasp the material after explaining things to them. 


Department of GMES Attends the 2024 Annual SME Conference & Expo in Phoenix

A large group of students and faculty from the Department of Geological and Mining Engineering and Sciences (GMES) attended the 2024 Annual Society of Mining, Metallurgy, and Exploration (SME) Conference & Expo, held in Phoenix, Arizona, from February 25-28. The group included seven BS students, eight MS students, one Ph.D. student, and three faculty members (Chatterjee, Manser, Smirnov). This annual conference provides an excellent opportunity for our students to gain exposure to the latest advances in mining engineering research and practice, network with industry professionals, and explore future career paths. The Department provided full or partial travel support to all student participants thanks to the generosity of the Richard Saccany Mining Program Fund, the Robert Hendricks Mining Endowment Fund, and our friends who have supported the Mining Engineering program.

The students in attendance were Cassie Burch, Aiden Harmon, Lucas Maxon, Ian Repic, Nathan Seidel, Anton Smirnov Grady Williams, Theo Asumah, Alfred Yeboah, Rapheka Targbwe, Maxwell Yeboah, Jhuleyssy L. Sanchez Aguilar, Angela Amoh, Isaac Donkoh, Conor Large, and Abid Danish.

This year, our AggCelerate student team made it to the top six nationally in the final phase of the SME/National Stone, Sand, and Gravel Association (NSSGA) Student Design Competition! This annual competition is a demanding two-phase, team-based, problem-solving activity involving a technical design and an oral presentation. The problem highlights the challenges and opportunities associated with operating a sand and gravel quarry, developing an overall design plan, and optimizing the operating methods and economics. Students work on the problem from the perspective of an engineering consulting team responsible for developing the pit and mineral processing plant configuration.

The AggCelerate team at SME: (left to right) Ian Repic, Cassie Burch, Nathan Seidel, Grady Williams, Aiden Harmon, and Lucas Maxon

The interdisciplinary Michigan Tech team included mining engineering majors Aiden Harmon, Lucas Maxon, Ian Repic, Nathan Seidel, Grady Williams, and geological engineering junior Cassie Burch. “Under the expert guidance of Dr. Nathan Manser, Professor of Practice at GMES, the team has demonstrated exceptional skill and knowledge in their field,” said Aleksey Smirnov, Department of GMES Chair, who attended the conference. Although our team did not make it to the podium, the judges complimented the novelty of their design solutions.

On the research side, Associate Professor and a Witte Family Faculty Fellow in mining engineering, Dr. Snehamoy Chatterjee, delivered an oral presentation titled “Developing a Recourse Action to Survive Low Commodity Prices in Open Pit Mine Planning.” This research develops a recourse action strategy under an uncertain environment to revisit the mine production planning when metal prices decline.

Dr. Chatterjee’s Ph.D. student, Abid Danish, presented a talk titled “Enhancing Workplace Safety in the Mining Industry: A Data-Driven Approach through Unstructured Accident Narrative Analysis and Clustering.” He analyzed MSHA accident/injury data narratives using natural language models and unsupervised machine learning algorithms to understand the risks associated with mining accidents.

PhD student, Abid Danish presents his talk.

The GMES department co-sponsored and hosted an alumni engagement event. The two-hour social event was well-attended by alumni from several MTU departments, such as GMES, Chemical Engineering, Material Science and Engineering, and other programs and current MTU faculty and students. The event was a great opportunity for everyone to network and catch up with old friends. Overall, the alumni engagement event was a success, and plans for the next meeting in Denver are already underway. We are grateful to all the alumni who attended and look forward to seeing even more of them at future events. This year, the event was co-sponsored by the Department of Chemical Engineering.

Associate Professor Dr. Chatterjee welcomes guests.
The GMES alumni event.

Rumbling Recognition: Volcanology Professor Achieves Dual Honors

Dr. Simon Carn

In a stunning display of ‘when it rains, it pours,’ Dr. Simon Carn, a Professor at the Department of GMES, has bagged two prestigious awards within a month—a feat as rare as spotting a double rainbow. On April 5, Dr. Carn was honored with the Michigan Tech Research Award, recognizing his outstanding achievements in research. Just weeks later, on April 18, he was bestowed the title of Distinguished Professor, an accolade awarded to faculty members who have made substantial contributions to the University and their discipline.

Dr. Carn has made seminal contributions to both applied and fundamental aspects of volcanology, remote sensing, and meteorology. Recognized as a world authority on multi-sensor remote sensing of volcanic clouds, he uniquely blends advanced knowledge of remote sensing, volcanology, and atmospheric science. His research is noted for its innovation, collaborative spirit, and versatility, focusing on employing remote sensing data in studies of volcanic degassing, eruption clouds, and anthropogenic pollution. Dr. Carn excels in translating theoretical understanding into practical solutions, significantly impacting volcanic hazard prediction and mitigation and enhancing aviation safety. This blend of academic and practical prowess has earned him broad international recognition, including the American Meteorological Society Special Award and the NASA/US DOI William T. Pecora Award.

Dr. Carn has secured substantial external funding to support his research, with contributions from prestigious agencies such as NASA, NSF, and NOAA, underscoring the scientific community’s strong confidence in his work. His external expenditure ranks among the highest at MTU. His scholarly output is both prolific and collaborative, featuring 133 peer-reviewed publications and book chapters, many co-authored with his students. He is also among the most cited researchers at the university.

An inspiring mentor and instructor, Dr. Carn has guided four postdoctoral researchers, 22 PhD and 36 MS students. He led our successful dual International Master in Geology (INVOGE) program from 2009 to 2015 in collaboration with Université Blaise Pascal, the University of Buffalo, and the University of Milan Bicocca. His students have found employment in the public, government, and academia worldwide.

Dr. Carn has made significant contributions to his professional community, serving as an Associate Editor for the Journal of Geophysical Research and as Secretary of the Remote Sensing Commission of the International Association of Volcanology and Chemistry of the Earth’s Interior (IAVCEI) since 2008. Additionally, he has been a member of the National Academy of Sciences Committee on Improving Understanding of Volcanic Eruptions, the AAAS Review Committee for the U.S. Geological Survey Volcanic Hazards Program, and various scientific committees for international conferences and workshops.

Importantly, Dr. Carn has been very active and efficient in outreach and promotion of science. He is a frequent and long-term contributor to NASA’s Earth Observatory educational website and other outlets such as Scientific American and National Geographic. He conducted TV, radio, and newspaper interviews with BBC World Service, The Weather Channel, Wall Street Journal, Weather Underground, and others. Finally, he has actively promoted his research on X (formerly Twitter) with more than 7000 followers as of today.

Congratulations, Simon, on these well-deserved awards!

Shiliang Wu on Air Quality in Detroit

Shiliang Wu
Shiliang Wu

Shiliang Wu (GMES/CEGE) was quoted by Planet Detroit in a story explaining how a winter atmospheric inversion lowered air quality January 7-8, 2024, in Detroit. Wu co-authored a 2016 study that found a 50% increase over the last 60 years in the frequency of winter atmospheric inversions and summer heatwaves, which can both increase air pollution. The story was picked up by Great Lakes Now.

“For the last at least 60 years we have data for, we can clearly see a trend of increasing temperature inversions in mid-latitude regions.”

Shiliang Wu, professor at Michigan Tech

Wu is a dual-appointment professor in Geological and Mining Engineering and Sciences and Civil, Environmental, and Geospatial Engineering. His research involves impacts of global change on atmospheric chemistry and long-range transport of air pollution.