Events
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JSG | BEG | UTIG | DGS |
First Day of Classes
Start:January 9, 2023
End:
January 9, 2023
RoKafe
Start:January 10, 2023 at 10:00 am
End:
January 10, 2023 at 11:00 am
Faculty Meeting
Start:January 10, 2023 at 12:30 pm
End:
January 10, 2023 at 1:45 pm
Location:
Barrow
Contact:
Jessica Yeager
UTIG Seminar Series: Luke Zoet, University of Wisconsin-Madison
Start:January 13, 2023 at 10:30 am
End:
January 13, 2023 at 11:30 am
Location:
PRC 196/ROC 1.603
Contact:
Constantino Panagopulos, costa@ig.utexas.edu, 512-574-7376
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Speaker: Luke Zoet, Associate Professor, Department of Geosciences, University of Wisconsin- Madison
Host: Ginny Catania
Title: Determining how glaciers deform their beds
Abstract: Many fast-moving glaciers move atop beds made of deformable sediments (till), and deformation of these subglacial sediments during basal slip shapes the beds and regulates glacier flow. The resultant sediment flux impacts glacier dynamics and rates of subglacial erosion over a range of timescales, but its fundamental dependencies are not well understood. Using a cryogenic ring shear device, we conducted experiments to investigate the effects of both effective stress and slip speed on rates of till transport. We find a near-linear relationship between sediment flux and slip speed, but a non-monotonic, double-valued dependency of sediment flux on effective stress. Deformation primarily occurred in a thin shear band near the ice sole, the thickness of which could vary with both parameters.
RoKafe
Start:January 17, 2023 at 10:00 am
End:
January 17, 2023 at 11:00 am
Faculty Meeting
Start:January 17, 2023 at 12:30 pm
End:
January 17, 2023 at 1:45 pm
Location:
JGB 4.102 (Barrow)
Contact:
Jessica Yeager
DeFord Lecture | Alicia Wilson
Start:January 19, 2023 at 4:00 pm
End:
January 19, 2023 at 5:00 pm
Location:
JGB 2.324 (Boyd Auditorium)
Contact:
John Lassiter
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Subseafloor Hydrogeology: Moving Beyond Watersheds by Alicia Wilson, University of South Carolina
Abstract: The field of submarine groundwater discharge (SGD) was launched in the 1990s by the remarkable discovery, via naturally-occurring isotopic tracers, that saline groundwater was discharging to the South Atlantic Bight in very large volumes. Subsequent studies confirmed that saline groundwater discharges to the Atlantic Ocean in volumes that rival river discharge. All available evidence indicates that this saline groundwater is highly enriched in nutrients compared to river water, so the nutrient contributions of this submarine discharge exceed that of river discharge. These findings have been slow to find widespread acceptance, however, because it has been exceedingly difficult to confirm this flow by means other than the original isotropic tracers. This discharge does not occur near the shoreline, and no conceptual models for SGD far from shore existed.
DeFord Lecture Series
Since the 1940’s, the DeFord (Technical Sessions) lecture series, initially the official venue for disseminating DGS graduate student research, is a forum for lectures by distinguished visitors and members of our community. This is made possible through a series of endowments.
UTIG Seminar Series: Ignacio Sepulveda, San Diego State University
Start:January 20, 2023 at 10:30 am
End:
January 20, 2023 at 11:30 am
Location:
PRC 196/ROC 1.603
Contact:
Constantino Panagopulos, costa@ig.utexas.edu, 512-574-7376
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Speaker: Ignacio Sepulveda, Assistant Professor, Coastal Engineering, San Diego State University
Host: Harm van Avendonk
Title: Compound and cascading processes shaping tsunami responses: A new era of multidisciplinary research
Abstract: Catastrophic tsunamis in the last few years have evidenced a more complex genesis and coastal response than previously thought. As a consequence, tsunami modeling and hazard prediction tools are under scrutiny. New tsunami research is needed which shall integrate multiple disciplines. Two pressing questions investigated by our group are the influence of compounding processes increasing tsunami hazard and the understanding of non-conventional geophysical processes cascading into tsunamis.
Tides and climate driven sea level rise (SLR) contribute significantly to water level changes in the short and long term, respectively. In terms of magnitude, they could be comparable to tsunamis of interest at certain coasts. New non-stationary probabilistic tsunami hazard assessment (nPTHA) methods are developed to include the mean sea level changes due to a warming climate and the uncertainty of the tidal phase at the moment of tsunami occurrence. A surrogate model is used in the nPTHA method to render the calculation feasible and efficient. The development of formulations based on surrogate models is the key to establishing a method which feasibly can be applied to other regions for comprehensive analysis at a global scale. As an illustration, these methods are applied for assessing tsunamis generated in the Manila Subduction Zone and impacting the coasts of Kao Hsiung and Hong Kong. The results of the illustration case show that tides have a relevant impact on the nPTHA. However, the SLR within an exposure time of 100 years has a stronger impact. It is perhaps counterintuitive for the increase in hazard from SLR to be greater than the increase from tides, when the perception by the general public may be that tides are much bigger than estimates of SLR, because of familiarity. This poses an outreach opportunity for increasing awareness of climate change and tsunami hazards.
Recent catastrophic tsunamis have also evidenced the relevance of non-conventional tsunamigenic sources. The 2022 Hunga Tonga-Hunga Ha’apai Volcano eruption, in particular, triggered a tsunami which was recorded globally. While the highest tsunami crest-to-trough heights, up to 3 meters, were only recorded within the Pacific coastlines, heights up to 1 meter could be also observed in remote locations such as Ghana and Portugal. The high waves and far-reaching character of the tsunami reopened the question about the destructive potential of volcanic tsunami hazards. The signature of the 2022 tsunami around the globe is investigated and new numerical tools to simulate the special forcing mechanisms of volcanic sources are under development. These studies aim to provide tools for volcanic tsunami hazard assessment approaches and to improve the quantification of their uncertainties.
CPSH Seminar Series: Sean Gulick, CPSH & UTIG
Start:January 23, 2023 at 1:00 pm
End:
January 23, 2023 at 2:00 pm
Location:
PMA 15.216B
Contact:
Brandon Jones, brandon.jones@utexas.edu
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Speaker: Sean Gulick, Co-Director, UT Center for Planetary Systems Habitability, Research Professor, University of Texas Institute for Geophysics, Jackson School of Geosciences
Host: Brandon Jones
Title: Beyond Mass Extinction: Hydrothermal Habitats at the Chicxulub and Ries Impact Structures
Location: PMA 15.216B, Physics, Math and Astronomy Bldg.
UT Austin, Department of Astronomy
2515 Speedway, Stop C1400
Austin, Texas 78712-1205
RoKafe
Start:January 24, 2023 at 10:00 am
End:
January 24, 2023 at 11:00 am
Location:
JGB 2.104A
DeFord Lecture | Ekaterina Larina
Start:January 26, 2023 at 4:00 pm
End:
January 26, 2023 at 5:00 pm
Location:
JGB 2.324 (Boyd Auditorium)
Contact:
John Lassiter
Paleoenvironmental and paleoecological trends leading up to the end-Triassic mass extinction by Ekaterina (Katya) Larina, Jackson School of Geosciences
Abstract: The end-Triassic mass extinction (ETE) is one of the biggest biotic crises that has occurred during geological history and the main cause is generally attributed to the emplacement of the Central Atlantic Magmatic Province (CAMP) ~201.51 million years ago. The amount of CO2 injected into the atmosphere during each CAMP magmatic pulse rivals anthropogenic CO2 emission projected for the 21st century. Although the ETE and its aftermath are well documented, the conditions leading up to the ETE remain poorly understood. This study aims to resolve environmental conditions in Panthalassic and Tethys basins that acted in the leadup to the ETE and its impact on the complexity of marine benthic ecosystems. The study of upper Rhaetian sections in Tethys realm reveals an ecologically diverse and robust marine benthic community across different depositional environments all the way up to the main phase of CAMP volcanism implying the sudden tempo of ecological changes in Tethys compared to the more protracted nature of ecological shifts recorded in the Panthalassa. Despite disparities in paleoenvironmental and paleoecological trends in the lead up to the ETE across the basins, the severity of the extinction is apparent across the globe once the main phase of CAMP volcanic activity was initiated.
DeFord Lecture Series
Since the 1940’s, the DeFord (Technical Sessions) lecture series, initially the official venue for disseminating DGS graduate student research, is a forum for lectures by distinguished visitors and members of our community. This is made possible through a series of endowments.
RoKafe
Start:January 31, 2023 at 10:00 am
End:
January 31, 2023 at 11:00 am
Location:
JGB 2.104A
Contact:
Nicola Tisato
RoKafeJanuary, 31 2023Time: 10:00 AM - 11:00 AMLocation: JGB 2.104A ![]() |
Alumni Reception during NAPE in HoustonFebruary, 02 2023Time: 5:30 PM - 7:30 PMJoin the Jackson School of Geosciences for an alumni reception in Houston during the NAPE expo. WHEN: Thursday, February 2 | 5:30-7:30pm WHERE: Chapman & Kirby ![]() |
DeFord Lecture | Demian SafferFebruary, 02 2023Time: 4:00 PM - 5:00 PMLocation: JGB 2.324 (Boyd Auditorium) Wiring the Subduction Megathrust: Recurring and Triggered Slow Slip Events Near the Trench Along the Nankai Subduction Zone by Demian Saffer, Jackson School of Geosciences Abstract: The offshore reaches of subduction megathrusts fail in a broad spectrum of slip modes, spanning from coseismic slip in great earthquakes, to tsunami earthquakes, to tremor and low frequency earthquakes, to slow slip events (SSE) and aseismic creep. Understanding the nature of strain accumulation and release in this region is central to assessing hazards associated with shallow earthquake rupture and tsunamigenesis. In this talk I describe a family of newly discovered repeating SSE in the Nankai subduction zone offshore of Honshu Japan, updip of rupture zone of great (M8) earthquakes, using formation pore pressure data from instrumented borehole observatories.??After filtering oceanographic noise using a local hydrostatic reference, the records over a 6 year period from 2010-2016 reveal 8 events. Of these, 6 arise spontaneously, and occur at ~1 yr intervals with durations of ~7-21 days. The remaining 2 events are larger and immediately follow: (1) the 2011 M9 Tohoku earthquake; and (2) the 2016 M7 Kumamoto earthquake. In some cases, the SSE are accompanied by swarms of low-frequency tremor and low-frequency earthquake activity that appear to migrate trenchward. The data are well fit by slip of ~1-4 cm on a patch at the plate interface that extends 20-40 km in the dip direction. A key implication is that the SSE accommodate ~30-50% of plate convergence across the outer ~40 km of the forearc. This coincides with a region of the shallow-most megathrust characterized by: (1) elevated pore fluid pressure; (2) transitional frictional behavior that promotes the nucleation of unstable slip at low sliding velocities; and (3) low stress magnitudes as constrained by analysis of wellbore failures. The repeating nature of the events, taken together with apparent triggering by regional earthquakes and the inference of low in situ stress magnitudes, indicates that the outermost reaches of the megathrust are highly sensitive to perturbation and are perched near a state of failure. DeFord Lecture Series Since the 1940\'s, the DeFord (Technical Sessions) lecture series, initially the official venue for disseminating DGS graduate student research, is a forum for lectures by distinguished visitors and members of our community. This is made possible through a series of endowments. |
UTIG Seminar Series: Lindy Elkins-Tanton, Arizona State UniversityFebruary, 03 2023Time: 10:30 AM - 11:30 AMLocation: PRC 196/ROC 1.603 Speaker: Lindy Elkins-Tanton, Foundation and Regents Professor, School Of Earth and Space Exploration, Arizona State University Host: Krista Soderlund Title: The NASA Psyche Mission: An Electric Journey to a Metal World Abstract: When our solar system was just an infant, thousands of planetesimals formed in fewer than one million years. Heat from the decay of the short-lived radioactive 26Al melted many planetesimals, allowing metal cores to differentiate from rocky mantles. Over the next few tens of millions of years, many planetesimals crossed paths catastrophically. Colliding worlds merged into even larger planets, eventually forming a small number of planetary embryos. Models show that some destructive “hit and run” impacts strip the silicate mantle from differentiated bodies. This is the leading hypothesis for the formation of asteroid (16) Psyche’s formation: it is a bare planetesimal core. But we all know that the solar system is more complex than we have been able to imagine, and there are many possible origins of Psyche based on the limited data we now have. Deep space missions, too, are almost unimaginably complex. In this talk I will introduce what is known and what is hypothesized about asteroid Psyche based on the latest data, how we have planned a mission to an unknown object, how we progressed with the mission through COVID and what happened when our launch date slipped to October of 2023, and what we will measure and discover while our robotic spacecraft is orbiting the asteroid. |
Faculty MeetingFebruary, 07 2023Time: 12:30 PM - 1:45 PMLocation: Barrow |
RoKafeFebruary, 07 2023Time: 10:00 AM - 11:00 AMLocation: JGB 2.104A ![]() |
DeFord Lecture | TBDFebruary, 09 2023Time: 4:00 PM - 5:00 PMLocation: JGB 2.324 (Boyd Auditorium) TBD by Abstract: DeFord Lecture Series Since the 1940\'s, the DeFord (Technical Sessions) lecture series, initially the official venue for disseminating DGS graduate student research, is a forum for lectures by distinguished visitors and members of our community. This is made possible through a series of endowments. |
UTIG Seminar Series: Shuichi Kodaira, JAMSTECFebruary, 10 2023Time: 10:30 AM - 11:30 AMLocation: PRC 196/ROC 1.603 Speaker: Shuichi Kodaira, Director General, Research Institute for Marine Geodynamics, Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Host: Thorsten Becker Title: Imaging, monitoring and modeling a seismogenic zone — Results and a future plan of JAMSTEC project Abstract: Toward understanding subduction megathrust processes at present, predicting a fault slip behavior in the future, and mitigating hazards by subduction zone earthquakes and tsunamis are central scientific themes and tasks that society expects a scientific community to address. To challenge those scientific themes, we, JAMSTEC, have been conducting an integrated project in subduction zones which consists of imaging megathrust fault structures, monitoring a wide spectrum of fault slips, and simulating future fault behavior using the results of the imaging and monitoring studies. The Nankai Trough megathrust seismogenic zone is one of the primally fields of the project. For imaging the Nankai megathrust zone, we have been mapping a precise 3D structure of the megathrust fault zone by densely deployed active-source seismic profiles covering the entire region of the Nankai Trough. From the 3D seismic image, we observe structural factors which are interpreted to control slips and coupling of the megathrust. For monitoring slip behavior, we have been developing a real-time seafloor geodetic monitoring system to detect activities of a wide spectrum of fault slips, including a regular earthquake, low-frequency tremors, very low-frequency earthquake, and short-term and long-term slow slip events. In this system, a tilt meter, pressure sensor, and fiberoptic strain meter are installed in a shallow or deep borehole. To continuously transfer the observed data to a land station in real-time, the geodetic sensors are connected to DONET, a cabled earthquake and tsunami monitoring system. To simulate and forecast a megathrust slip behavior, we have been constructing a realistic 3D Nankai megathrust zone model and developing simulation techniques to estimate the temporal evolution of fault slip and coupling in the megathrust zone with consideration of uncertainties of the model and the data. In addition to the Nankai project, I will talk about results of integrated study, which consists of seismic imaging, earthquake monitoring and tsunami simulation, in the outer-trench region of the Japan and the Kuril trenches. |
RoKafeFebruary, 14 2023Time: 10:00 AM - 11:00 AMLocation: JGB 2.104A ![]() |
DeFord Lecture | Veronika BrayFebruary, 16 2023Time: 4:00 PM - 5:00 PMLocation: JGB 2.324 (Boyd Auditorium) TBD by Veronika Bray, University of Arizona Abstract: DeFord Lecture Series Since the 1940\'s, the DeFord (Technical Sessions) lecture series, initially the official venue for disseminating DGS graduate student research, is a forum for lectures by distinguished visitors and members of our community. This is made possible through a series of endowments. |
UTIG Seminar Series: Tim Urban, UTIG Texas Space Grant ConsortiumFebruary, 17 2023Time: 10:30 AM - 11:30 AMLocation: PRC 196/ROC 1.603 Speaker: Tim Urban, Director, Texas Space Grant Consortium Host: Krista Soderlund |
Faculty MeetingFebruary, 21 2023Time: 12:30 PM - 1:45 PMLocation: JGB 4.102 (Barrow) |
RoKafeFebruary, 21 2023Time: 10:00 AM - 11:00 AMLocation: JGB 2.104A ![]() |
DeFord Lecture | Amy EastFebruary, 23 2023Time: 4:00 PM - 5:00 PMLocation: JGB 2.324 (Boyd Auditorium) Measuring and attributing geomorphic and sedimentary responses to modern climate change: Challenges and opportunities by Dr. Amy East, U.S. Geological Survey Abstract: Modern climate change is affecting virtually all terrestrial and nearshore settings to some extent today. This presentation will focus on some of the challenges of measuring climate-driven physical landscape responses to modern global warming, and identify opportunities to better characterize and quantify the extent and nuances of climate-change effects on geomorphic systems. Better understanding sedimentary and geomorphic responses to ongoing warming and hydrologic changes in myriad environmental settings will prepare societies to manage the risks to human health and safety, infrastructure, water–food–energy security, economics, and ecosystems that follow from climate-driven physical landscape change. DeFord Lecture Series Since the 1940\'s, the DeFord (Technical Sessions) lecture series, initially the official venue for disseminating DGS graduate student research, is a forum for lectures by distinguished visitors and members of our community. This is made possible through a series of endowments. |
UTIG Seminar Series: Christopher Gerekos, UTIGFebruary, 24 2023Time: 10:30 AM - 11:30 AMLocation: PRC 196/ROC 1.603 Host: Cyril Grima |
Faculty RetreatFebruary, 24 2023Time: 12:00 AM - 12:00 AMLocation: Wildflower Center |
RoKafeFebruary, 28 2023Time: 10:00 AM - 11:00 AMLocation: JGB 2.104A ![]() |
DeFord Lecture | Kristin BergmanMarch, 02 2023Time: 4:00 PM - 5:00 PMLocation: JGB 2.324 (Boyd Auditorium) TBD by Kristin Bergman, MIT Abstract: DeFord Lecture Series Since the 1940\'s, the DeFord (Technical Sessions) lecture series, initially the official venue for disseminating DGS graduate student research, is a forum for lectures by distinguished visitors and members of our community. This is made possible through a series of endowments. |