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JSG | BEG | UTIG | EPS |
UTIG Discussion Hour: Michael Shahin (KU)March, 19 2024Time: 2:00 PM - 3:00 PMLocation: ROC 2.201 |
UTIG Special Seminar: Hongyu Sun, CaltechMarch, 19 2024Time: 11:00 AM - 12:00 PMLocation: PRC 196/ROC 1.603 Speaker: Hongyu Sun, Postdoctoral Scholar in Geophysics, California Institute of Technology Host: Benjamin Keisling Title: Next-Generation Seismic Monitoring and Imaging with Artificial Intelligence Abstract: Numerous natural hazards, such as earthquakes, volcanic activities, and landslides, are sources of seismic waves. Seismology allows us to understand and reduce the risks of these hazards by investigating the origins of the seismic waves and inferring the structure and properties of the Earth’s interior. AI has transformed seismic data analysis, elevating the role of deep learning in seismology. In this talk, I will outline my contributions to improving seismic monitoring and subsurface imaging with AI. I will first present the Phase Neural Operator (PhaseNO) for earthquake detection and seismic phase picking. PhaseNO measures the arrival times of P- and S-waves from continuous seismic data simultaneously across input stations with arbitrary geometries. By leveraging the spatial-temporal information, PhaseNO outperforms single-station AI algorithms by detecting significantly more earthquakes and enhancing measurement accuracy. Additionally, I will show how deep neural networks can overcome the complexities in seismic imaging by being trained to generate seismic waves. These waves, although not directly recorded, are essential for imaging the Earth’s interior. I will provide case studies on full-waveform inversion with active-source seismic data and seismic interferometry with environmental noise. In summary, these AI methods are powerful complements to traditional computational methods and hold significant promise for mitigating natural hazards and climate change. |
DeFord Lecture | Dr. Gabrielle Wong-ParodiMarch, 21 2024Time: 4:00 PM - 5:00 PMLocation: Boyd Auditorium (JGB 2.324) The Dynamic Relationship Between Tropical Cyclone Threats and Human Behavior by Dr. Gabrielle Wong-Parodi, Stanford Doerr School of Sustainability, Stanford University Abstract: Climate change is unpredictable and occurring more rapidly than expected, requiring people act to reduce impacts on the environment and humans. Linear models of behavior change are unsuited for understanding the dynamic relationship between psychological processes (i.e., risk perceptions, emotions) and behaviors (i.e., household preparedness, energy conservation) that unfold against the dynamic and increasing magnitude of climate change-related threats. In this talk, I present longitudinal studies examining this dynamism in the context of tropical cyclones and describe a new model of dynamic climate action. I also discuss the implication of the results for adaptation, and in the design of meaningful interventions to promote protective adaptive behavior. |
UTIG Seminar Series: Zhongwen Zhan, CaltechMarch, 22 2024Time: 3:00 PM - 4:00 PMLocation: PRC 196/ROC 1.603 NOTE: This seminar is hosted jointly with the Bureau of Economic Geology and will be held at 3pm. The seminar will be followed by a reception in the first floor UTIG lobby at 4pm. Speaker: Zhongwen Zhan, Professor of Geophysics, Seismological Laboratory, Caltech Host: Duncan Young Title: Enhancing Environmental Seismology with Fiber Optic Sensing Abstract: Fiber optic sensing has significantly advanced seismological resolution in recent years, enhancing our ability to study environmental phenomena from tectonic scales down to details as fine as tens of meters. This technological leap offers broad spatial coverage and uninterrupted temporal sampling, addressing challenges in hydrology and glaciology such as deploying and maintaining observational systems with adequate coverage and sensor density. In this lecture, I will discuss two exemplary projects: the South Pole Distributed Acoustic Sensing (DAS) array, utilizing an 8-km fiber-optic cable at the Amundsen–Scott South Pole Station, and the Indian Wells Valley DAS array, operational since 2019. These initiatives underscore the vast research potential at the intersection of fiber-optic seismology, glaciology, and hydrology, showcasing how these technologies can illuminate new paths for environmental seismology. |
Hot Science - Cool Talks: \"Breaking the Universe\"March, 22 2024Time: 5:30 PM - 8:15 PMLocation: Welch 2.224 The powerful James Webb Space Telescope allows us to see back to the beginning of time, shortly after the Big Bang, when the first stars and galaxies were only starting to form. Professor Caitlin Casey will explore with us some exciting new discoveries made using JWST during the first billion years of cosmic time. These discoveries are challenging scientists’ existing understanding about the universe itself and will change the way you see the cosmos. |
Planetary Habitability Seminar SeriesMarch, 25 2024Time: 1:00 PM - 2:00 PMLocation: PMA 15.216B UT Center for Planetary Systems Habitability Seminar Series. See website for speaker schedule and more details: View Events Join remotely: https://utexas.zoom.us/j/94052130734 In person: Classroom 15.216B, Physics, Math and Astronomy Bldg. UT Austin, Department of Astronomy 2515 Speedway, Stop C1400 Austin, Texas 78712-1205 |
UTIG Discussion Hour: Okezie Chinemerem (EER & BEG)March, 26 2024Time: 2:00 PM - 3:00 PMLocation: ROC 2.201 |
UTIG Special Seminar: Sophie Coulson, University of New HampshireMarch, 26 2024Time: 11:00 AM - 12:00 PMLocation: PRC 196/ROC 1.603 Speaker: Sophie Coulson, Assistant Professor, Department of Earth Sciences, University of New Hampshire Host: David Mohrig Title: Predicting and Observing Geophysical Patterns of Sea Level Change Abstract: Rapid melting of ice sheets and glaciers drives a unique geometry, or fingerprint, of sea level change. As an ice sheet loses mass, its gravitational attraction on the nearby ocean is reduced, causing ocean water to migrate away from the ice sheet. Additionally, the solid Earth rebounds in response to the reduction in surface loading. This combination of geophysical processes leads to a sea level fall within ~2000 km of the melting ice sheet and a progressive sea level rise outside of this region. In this talk I will discuss numerical models developed to predict these patterns of sea level change and recent implications for, and conclusion drawn from, observational datasets. Specifically, I’ll explore the fingerprint of sea level change due to ice mass loss from the Greenland Ice Sheet and Arctic glaciers over the last three decades and its effect on sea surface height measurements, GPS data and earthquake hazard. |
UTIG Seminar Series: Melisa Diaz, The Ohio State UniversityMarch, 29 2024Time: 10:30 AM - 11:30 AMLocation: PRC 196/ROC 1.603 Speaker: Melisa Diaz, Assistant Professor, The Ohio State University Host: Benjamin Keisling |
UTIG Discussion Hour: Kaitlin Schaible (UTIG)April, 02 2024Time: 2:00 PM - 3:00 PMLocation: ROC 2.201 |
UTIG Seminar Series: Chuanming Liu, UT AustinApril, 05 2024Time: 10:30 AM - 11:30 AMLocation: PRC 196/ROC 1.603 Speaker: Chuanming Liu, Distinguished Postdoctoral Fellow, UT Jackson School of Geosciences, Postdoctoral Fellow, University of Texas Institute for Geophysics Host: Thorsten Becker |
UTIG Discussion Hour: Soraya Alfred (UTIG)April, 09 2024Time: 2:00 PM - 3:00 PMLocation: ROC 2.201 |
UTIG Seminar Series: Tanner Miller, UTIGApril, 12 2024Time: 10:30 AM - 11:30 AMLocation: PRC 196/ROC 1.603 Speaker: Tanner Miller, Postdoctoral Fellow, University of Texas Institute for Geophysics Host: Peter Flemings |
UTIG Seminar Series: Crispin Little, University of LeedsApril, 12 2024Time: 2:00 PM - 3:00 PMLocation: PRC 196/ROC 1.603 Join us for a special seminar with Professor Cris Little. Speaker: Crispin Little, Professor, School of Earth and Environment, University of Leeds Host: Rowan Martindale Title: Biotic response to environmental perturbations in the Pliensbachian and Toarcian stages of the Lower Jurassic Abstract: The Lower Jurassic period was characterized by instability in global climate, with alternating greenhouse and icehouse states, and episodes of widespread oxygen depletion in the shallow marine environment. These episodes of oxygen depletion are marked by frequent intervals of increased organic carbon preservation in shallow marine sediments. The Pliensbachian stage of the Lower Jurassic was characterised by significantly cooler global temperatures than the preceding Sinemurian, and the following Toarcian stages, and ended with an extinction event (notably for ammonites) at the Pliensbachian-Toarcian boundary (Pl-To) ca. 184.2 Ma. About one Myr later the Toarcian Oceanic Anoxic Event (T-OAE) is characterized Corg rich black shale successions, particularly well developed in sedimentary basins in NW Europe, which display a negative ?13Corg excursion of -5 to -6‰, lasting 0.5 to 1.5 Myr. This excursion has been tied to a disruption of the global exogenic carbon cycle, but the ultimate source of the injected 12C is a matter of debate, with suggestions including methane hydrates, thermogenic methane produced by volcanism in the Karoo-Ferrar Large Igneous Province (LIP), wetlands, and permafrost destabilisation. The onset of the T-OAE in many (but importantly not all) sections is intimately linked to an extinction event that especially impacted the marine benthic macrofauna, but left the nekton largely unaffected. The recovery from this event is not well studied, but in one site, the Cleveland Basin of North Yorkshire, UK, although species richness recovered markedly as soon as environmental conditions ameliorated, other metrics of functional diversity and community structure did not attain pre-extinction levels until much later, some five million years after the extinction event. The talk will be of interest to those working on macroevolution, paleontology, and the effect of large scale climate change on marine ecosystems. |
UTIG Discussion Hour: Medha Prakash (UTIG)April, 16 2024Time: 2:00 PM - 3:00 PMLocation: ROC 2.201 |
UTIG Seminar Series: Emma \"Mickey\" MacKie, University of FloridaApril, 19 2024Time: 10:30 AM - 11:30 AMLocation: PRC 196/ROC 1.603 Speaker: Emma \"Mickey\" MacKie, Assistant Professor, Geological Sciences, University of Florida Host: John Goff |