Geological and Mining Engineering and Science News

Category: Research

Simon Carn on Sulfur Dioxide Emissions from Fagradalsfjall

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False color image of part of Iceland showing a bright, orange flow on top of older lava flows.
The false-color image of fresh lava flowing south in Iceland was acquired on July 17, 2023, by the Operational Land Imager-2 (OLI-2) on Landsat 9.

On July 10, 2023, lava began to spill from the Fagradalsfjall volcanic system in southwestern Iceland, marking the third consecutive summer of activity at the volcano.

Simon Carn (GMES) was quoted by NASA’s Earth Observatory and eGreenews in stories about the continuing eruption of Fagradalsfjall.

“Based on satellite and ground-based data, emissions of sulfur dioxide from Fagradalsfjall are in the range of several thousands of tons per day—similar to the 2021 and 2022 eruption,” said Carn, a volcanologist at Michigan Tech and member of a NASA team that monitors sulfur dioxide emissions.

Read more at NASA Earth Observatory, by Adam Voiland.

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Jordan Ewing Computational Science and Engineering Ph.D. Defense

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On Friday, July 21, Jordan Ewing successfully defended the research for his doctoral degree in computational science and engineering.

Advised by Thomas Oommen, with Laura Brown, Stanley Vitton, and Paramsothy Jayakumar as committee members.

Title: Remote Sensing Approach for Terramechanics Applications Utilizing Machine and Deep Learning

Abstract: Terrain traversability is critical for developing Go/No Go maps, significantly impacting a mission’s success. To predict the mobility of a vehicle over a terrain, one must understand the soil characteristics. In situ measurements performed by soldiers in the field are the current method of collecting this information, which is time-consuming, are only point measurements, and can put soldiers in harm’s way. Therefore, this study investigates using remote sensing as an alternative approach to characterize terrain properties.

This approach will explore the relationships between electromagnetic radiation and soil types with varying properties. Optical, thermal, and hyperspectral sensors will be used to collect remote data and compare it against ground truth measurements for validation. Machine learning (linear, ridge, lasso, partial least squares, support vector machines, and k nearest neighbors) and deep learning (multi-layer perceptron and convolutional neural network) algorithms will be used to build prediction models.

Results showed that soil properties such as soil gradation, moisture content, and soil strength measured by a geogauge and averaged cone penetrometer for 0–6” and 0–12” (CP06 and CP12) can be estimated remotely. Deep learning provides the best models for estimating terrain characteristics compared to machine learning. It is shown that this method can produce much finer spatial resolution coverage than traditional geospatial point-based interpolation approaches and yield a higher prediction accuracy. Predictions maps can be used to generate threshold-based Go / No Go maps using a vehicle cone index or as a cost map for vehicle performance. A Polaris MRZR vehicle was used to test the application of these prediction maps for mobility purposes, and correlations were observed between the CP06 and rear wheel slip and CP12 and vehicle speed.

This study demonstrates the potential of using remote sensing data for more rapid and finer spatial resolution predictions of terrain properties with higher accuracies compared to traditional in situ mapping methods implementing machine and deep learning algorithms. The remote sensing approach allows the generation of Go/No Go and vehicle cost maps and, most importantly, provides a safe alternative to keep soldiers out of harm’s way.

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Beth Bartel Geology Ph.D. Defense

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On Friday, July 7, 2023, Beth Bartel achieved resounding success as she skillfully defended her research for her doctoral degree in geology.


Co-Advised by Greg Waite and Rüdiger Escobar Wolf, with Angie Carter, Kari Henquinet, and Luke Bowman as committee members.

Title: Information Use and Decision-Making for Evacuation at Fuego Volcano, Guatemala Information Use and Decision-Making for Evacuation at Fuego Volcano, Guatemala

Abstract: Active volcanoes are complex, multi-hazard systems. Early warning systems (EWS) may enable populations to live sustainably with volcanic hazards, but developing an effective EWS is far from straightforward, as is measuring its efficacy. At Fuego volcano, Guatemala, pyroclastic density currents (PDCs)—fast-moving flows and surges of hot volcanic gas, ash, and rock–killed more than 400 people during a paroxysmal eruption in June 2018 and continue to threaten the ~60,000 people living within the identified hazard zones. In this dissertation, I use mixed ethnographic methods to investigate evacuations at Fuego during and since the tragedia through three projects. I first investigate information availability and its use in decision-making on 3 June 2018. Next, I examine current practices for evacuation decision-making four and five years after the disaster, focusing on a partial evacuation on 7–8 March 2022. Finally, I use that same event to study how cultural gender expectations impact evacuation strategies and how women’s experiences in evacuation can inform future risk reduction strategies. With this dissertation, I aim to contribute a better understanding of the complex factors challenging the efficacy of EWS in order to improve existing approaches in and beyond Guatemala. In this way, this work aims to serve the population around Fuego volcano and others like it in various cultural, geographic, and economic settings.

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Caleb Kaminski MS in Geophysics Final Defense

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On April 21, 2023, Caleb Kaminski demonstrated resounding success in defending his research for his Geophysics Master of Science degree.

Advised by Aleksey Smirnov, with Paul van Susante and Jeremy Shannon as committee members.

Title: Exploring Ground-Penetrating Radar Responses to Basaltic Terrain for Upcoming Lunar Expeditions

Abstract: In preparation for upcoming lunar expeditions, a comprehensive understanding of the Moon’s geophysical properties is imperative, particularly in the context of resource identification and extraction. This study focuses on the experimental characterization of electromagnetic (EM) behavior in the radio spectrum for ground-penetrating radar applications, utilizing basaltic Keweenawan stamp sand and highland lunar simulant soil test materials with varying particle grades. Under controlled laboratory conditions, we systematically analyzed and compared the differences in EM wave velocity and signal amplitude as a function of particle size and mineralogy, as represented in radargrams. Our findings demonstrate that the highland lunar simulant exhibits a significantly higher EM reflection coefficient than the stamp sand, which can be attributed to its lower conductivity arising from compositional differences. These results hold important implications for the development of remote sensing techniques and optimization of ground-penetrating radar systems for future lunar missions, ultimately enabling the efficient detection and extraction of valuable resources such as water ice on the lunar surface.

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Nolan Gamet MS in Geology Final Defense

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On June 22, 2023, Nolan Gamet achieved success in defending his research for his Master of Science in Geology.

Title: Structural Analysis and Interpretation of the Deformation Along the Keweenaw Fault System from Lake Linden to Mohawk, Michigan

Abstract: The Keweenaw fault is likely the most significant fault associated with the Midcontinent Rift System, with an estimated reverse slip of ~10 km that places Portage Lake Volcanics (~1.1 Ga) over much younger Jacobsville Sandstone (~1.0 Ga). Published bedrock geology maps with cross sections from the 1950s show the fault as a single continuous trace that is locally associated with smaller cross faults and splays. This M.S. thesis presents a structural analysis and interpretation of the Keweenaw fault system between Lake Linden and Mohawk, MI, which includes data collected from well-known localities such as Houghton-Douglass Falls, the St. Louis ravine, the Natural Wall ravine, and the anomalous rhyolite body near Copper City. These data were used to revise existing bedrock geology maps, construct new cross-sections, and analyze fold geometry and fault slip behavior to infer aspects of the tectonic regime that caused the deformation.

New field mapping has refined the trace geometry of the Keweenaw fault (KF) and smaller associated faults by shifting the main fault’s position laterally as much as 150m, revising intersections between several splay faults and the main fault, and suggesting the existence of several footwall splays not previously recognized. Orientation analysis of Jacobsville Sandstone strata in the footwall of the fault system defines fold axes with plunge directions changing from southwest in the south to northeast in the north. The style of folding also changes along the fault from broad syncline-anticline pairs in the southwest to tightly folded anticlines with overturned bedding to the northeast. Fault-slip analyses reveal a bimodal distribution strike-slip and reverse slip along the fault system that collectively define a 1:1 ratio and a nearly north-south maximum tectonic shortening direction of 2°–182°. The NS-trending shortening direction computed from fault-slip analysis creates a paradox yet to be explained. However, fold axis trends in the current area indicate shortening along an ESE-trending line, which is consistent with recent results for the fault system northeast of this study area and with Grenville orogenic compression being the primary cause of slip along the Keweenaw fault system.

Advised by James DeGraff, with Chad Deering, William Rose, and Jeremy Shannon as committee members.

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Paola Rivera-González MS in Geology Final Defense

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On April 5, 2023, Paola Rivera-González successfully defended her Geology Master of Science degree.

Title: Climate Changes in El Salvador: Impacts of ‘La Canícula’ (“Dog Days of Summer”) on Agricultural Practices and Decision-Making in Rural Communities

Abstract: The Central American Dry Corridor (CADC), a tropical dry forest region, is characterized by distinct rainy and dry seasons that influence the local agricultural calendar and decision-making in rural communities. ‘La canícula’ is a period of decreased precipitation during the rainy season, which typically occurs in July during the corn growing season in El Salvador. The ‘canícula’ is expected to change in intensity and duration in the next decades, which would impact small-scale farmers and their livelihoods. Climate variability and uncertainty has led to crop loss, water scarcity, and food insecurity in rural communities dependent on subsistence farming. Farmers’ experiences with a changing climate led to reformed decision-making and agricultural processes (eg. agricultural calendar, seed type usage, crop rotation) to optimize their harvest and adapt to a variable climate. Studying the local perceptions and adaptation practices of farmers showed how natural hazards related to global climate change impact society, community dynamics in how farmers identify their main challenges, and revealed the ways farmers improve resilience to a changing climate.

Advised by Luke Bowman with committee members Kari Henquinet, John Gierke

Paola Laguna Algeria
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Natalea Cohen MS in Geology Final Defense

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On Wednesday, June 14, 2023, Nat Cohen triumphed as she confidently defended her Geology Master of Science degree.

Nat Cohen on Mont Ripley

Title: Rain-induced hazards in remote, low-resource communities: A case study of flash flooding in the Usulután Department, El Salvador

Abstract: Natural hazards like flash floods can cause devastating impacts, so it is important to better understand these events to improve mitigation and emergency preparedness of vulnerable communities. California, El Salvador is a data-poor agricultural community experiencing climate change impacts and associated hazards, including flash flood events. This study uses ArcGIS Pro to map regional flash flood susceptibility and applies the Water Evaluation and Planning system (WEAP) to model sub-daily flash flood events in a California drainage well-known for flash flooding. Natural hazards like flash floods can cause devastating impacts, so it is important to better understand these events to improve mitigation and emergency preparedness of vulnerable communities. California, El Salvador is a data-poor agricultural community experiencing climate change impacts and associated hazards, including flash flood events. This study uses ArcGIS Pro to map regional flash flood susceptibility and applies the Water Evaluation and Planning system (WEAP) to model sub-daily flash flood events in a California drainage well-known for flash flooding.

Co-Advised by Luke Bowman and John Gierke, with Greg Waite as a committee member.

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Bill Rose on the Dangers of Global Environmental Manipulation

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Distant view of an ash cloud from a volcano.
A huge cloud of volcanic ash and gas rises above Mount Pinatubo, Philippines, on June 12, 1991. USGS fact sheet 113-97.

Professor Emeritus Bill Rose (GMES) was quoted by Medium in a story connecting Mount Pinatubo’s eruption in 1991 to recent geoengineering proposals seeking to replicate the cooling effect that large volcanic eruptions have on global temperatures. Rose has extensively studied the climactic effects of Mount Pinatubo and other volcanic eruptions. The cooling effect is likely due to liquid sulfate aerosol, which could potentially be introduced artificially.

According to Bill Rose, this would put scientists and politicians into a dangerous system of global environmental management where essentially another form of pollution is pumped into the atmosphere to offset the impact of the current pollution.

Read more at Medium, by Floyd Whaley.

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GMES Researchers on Infrasound Detection of Approaching Lahars

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The National Science Foundation mentioned Michigan Tech in a story about a study showing that infrasound remote sensing technology is an effective way to monitor catastrophic volcanic mudflows. Rudiger Escobar Wolf and Greg Waite (GMES) and Ph.D. student Gustavo Bejar Lopez (geology) are co-authors of the study, which was published in Nature Scientific Reports. NSF’s story was picked up by EIN Presswire.

The study is a collaborative effort by scientists at Boise State University, the Instituto Nacional de Sismología, Vulcanología, Meteorología e Hidrología in Guatemala, and Michigan Technological University, and is funded by the U.S. National Science Foundation.

Johnson, J.B., Roca, A., Pineda, A. et al. Infrasound detection of approaching lahars. Sci Rep 13, 6476 (2023). https://doi.org/10.1038/s41598-023-32109-2

Sets of waveforms over time with graphs of lag times and location precision. Descriptions are in the caption and full article.
Cross correlation analysis from station IO is used to detect sound originating from the Ceniza drainage. Read the full caption online. Scientific Reports articles are published OA under a CC BY license (Creative Commons Attribution 4.0 International license). Read the full article.
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Dr. Radwin Askari Receives National Science Foundation CAREER Award

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Radwin Askari’s work as a researcher and educator has been recognized with CAREER Awards from the National Science Foundation.

GMES Associate Professor Radwin Askari, a geophysicist who studies cavitation in volcanoes’ fluid-filled magmatic cracks, has earned a National Science Foundation (NSF) CAREER Award.

The awards recognize Askari, an associate professor of geological and mining engineering and sciences, as an early-career faculty who demonstrates the potential to serve as academic role model in research and education, and to lead advances in the mission of his department or organization. The five-year grant will support both research work and education outreach. 

Askari’s award will enhance both research capabilities and educational opportunities in the Physical Modeling Laboratory.

Understanding Volcanoes Through Integrated Physical Modeling  

Askari will receive more than $668,000 to continue research in the Physical Modeling Laboratory (PML), which he founded in the Department of Geological and Mining Engineering and Sciences (GMES). For his CAREER project, he’ll develop two analog apparatuses to investigate the cavitation mechanism in fluid-filled magmatic cracks and the developments of sub-cracks and seismic signals that result. Askari said it is crucial to understand both the cavitation mechanism and the dynamics of a volcano’s magmatic crack growth in order to estimate the scale of magma transport. 

“The results from this research can improve the forecast of volcanic eruptions, which in turn can help to mitigate their consequent hazards.”

Radwin Askari

As a result, Askari will be able to assess other complex scenarios in fracture evolution and their corresponding seismicity, a major step toward his ultimate research goals in the field. He also plans to purchase new lab equipment, including a high-speed imaging system, to substantially enhance the PML’s experimental capacities. Other disciplines across campus, including biomechanics, aerodynamics and fluid dynamics, will also be able to use these advanced tools for future multidisciplinary research collaborations. 

Askari plans to promote earth science literacy for students, educators and the public by producing several educational videos and a virtual PML lab tour. He will also offer summer research internships to students from traditionally underserved populations. 

Askari said he’s grateful to GMES Chair Aleksey Smirnov, along with Assistant Vice President for Research Development Peter Larsen and colleagues in Tech’s Sponsored Programs Office, for their support and guidance. He also thanked retired GMES staff member Carol Asiala, an assistant research scientist and engineer, for her assistance with the nontechnical parts of his award proposal.

Learn more about the Physical Modeling Laboratory.

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