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Open dialogue about important issues in earthquake science presented by Center scientists, visitors, and invitees.
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A new Springer Nature Geo- and Earth-Sciences podcast called My Sediments Exactly, dedicated to exploring the fascinating world of Geo-, Earth and Environmental Sciences with focus on sustainability. Our aim is to highlight the countless ways in which these sciences impact our understanding of the world, from the deepest ocean trenches to the highest mountain peaks, and everything in between.
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Rapid, physics-informed seismic wavefield predictions using high-performance computing and reduced-order modeling techniques
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John Rekoske, University of California San Diego Rapidly estimating the ground shaking produced by earthquakes in real-time, and from future earthquakes, are important challenges in seismology. Numerical simulations of seismic wave propagation can be used to estimate ground motion; however, they require large amounts of computing power and are too …
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Source, path, and site effects and their role on earthquake ground motions
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Haiyang Kehoe, USGS Seismograms contain information of an earthquake source, its path through the earth, and the local geologic conditions near a recording site. Ground shaking felt on Earth’s surface is modified by each of these contributions–the spatiotemporal evolution of rupture, three-dimensional subsurface structure, and site cond…
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Solving the ground-motion puzzle one piece at a time
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Tara Nye, USGS Models of earthquake ground motion (both simulations and ground-motion models) can be likened to a puzzle with three primary pieces representing the earthquake source, site conditions, and source-to-site path. Early versions of these models were developed using average behavior of earthquakes across a variety of regions and tectonic …
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Empowering Science Communication through Storytelling, One Quilt at a Time: An Interview with Prof. Laura Guertin, Penn State Brandywine University
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Summary Professor Laura Guertin, a marine geologist and earth science educator, combines her passion for science with quilting to create science storytelling quilts. These quilts serve as a unique and engaging way to communicate scientific data and concepts to non-STEM audiences. By incorporating data sets into the quilts, Laura is able to captivat…
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Geometric Parametrization of Sedimentary Basins in Southern California for Site Response Analysis and Modelling
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Rashid Shams, University of Southern California Site response in sedimentary basins is partially governed by mechanisms associated with three-dimensional features. This includes the generation of propagating surface waves due to trapped and refracted seismic waves, focusing of seismic energy due to basin shape and size, and resonance of the entire …
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Combining earthquake and tsunami early warnings along the west coast of the United States
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Amy Williamson, University of California Berkeley Alerts sent through earthquake early warning (EEW) programs provide precious seconds for those alerted to take simple protective actions to mitigate their seismic risk. Programs like ShakeAlert have been providing alerts for felt earthquakes across the west coast of the US for almost 5 years. Earthq…
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Splay fault dynamics at subduction and rift margins: insight from 3D dynamic rupture modeling of the Cascadia megathrust and the Mai’iu low-angle normal fault
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James Biemiller, USGS An unresolved aspect of tsunami generation in great subduction earthquakes is the offshore competition between coseismic deformation mechanisms, such as shallow megathrust slip, slip on one or more splay faults, and off-fault plastic deformation. In this presentation, we first review results from data-constrained 3D dynamic ru…
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How Fault Network Geometry Affects Earthquakes
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Jaeseok Lee, Brown University Field observations indicate that fault systems are structurally complex, yet fault slip behavior has predominantly been attributed to local fault plane properties, such as friction parameters and roughness. Although relatively unexplored, emerging observations highlight the importance of fault system geometry in the me…
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Historical Seismic Data for the Future: Preservation, Digitization, and Utility
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Thomas Lee, Harvard University Since the first seismograms were recorded in the late 19th century, the seismological community has accumulated millions of ground motion records on both paper and film. While almost all analog seismic recording ended by the late 20th century, replaced by digital media, the still-extant archives of paper and film seis…
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Outing the Real Age of the Colorado River: An Interview with Dr. Shannon Dulin, University of Oklahoma
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Summary The Colorado River, one of the oldest rivers in the world, has been the subject of a joint study by the US Geological Survey and several universities. The study reveals that the river is younger than previously thought, with its grand debut occurring between 4.8 and 4.63 million years ago. The research used paleomagnetics and magnetostratig…
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Marsquake Focal Mechanisms from InSight Data: Understanding the Seismotectonics of Mars
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Ross Maguire, University of Illinois Urbana-Champaign Seismic source parameters – including hypocentral locations and focal mechanism solutions – provide the most direct constraints for understanding tectonic stresses and deformation processes within planetary interiors. The SEIS (Seismic Experiment for Interior Structure) seismometer d…
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Decadal Creep-rate Changes Along the Hayward Fault
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Roland Burgmann, University of California Berkeley Decadal changes in aseismic fault slip rate on partially coupled faults reflect long-term changes in fault loading and/or fault-frictional properties that can be related to earthquake cycle processes. We consider constraints on aseismic fault slip rates from historical alignment array measurements,…
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Understanding Seismic Risks through Historical Data: An Interview with Prof. Kenji Satake, AOGS, Japan
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Summary Professor Kenji Satake, a renowned seismologist and tsunami researcher, discusses his research on historical earthquakes and tsunamis using interdisciplinary approaches. He emphasizes the importance of combining geophysical, geological, and historical data to understand the timing and magnitude of these natural disasters. His work has uncov…
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Summary This special episode is to highlight the Japan Geoscience Union (JPGU) as a seismic force in geoscience, which offers a forum for the exchange of earth-shattering ideas and groundbreaking discoveries. Their annual meeting in Chiba, Japan this year brought together researchers from various geoscience disciplines and explored a wide range of …
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The Lost Nile Pathway Behind Egypt's Pyramid Clusters: An Interview with Joe Aslin, Deputy Editor, Communications Earth & Environment
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In this episode, we are speaking to Dr. Joe Aslin, Deputy Editor Communications Earth & Environment, an open access journal from the Nature Portfolio publishing high-quality research, reviews and commentary in all areas of the earth, environmental and planetary sciences. We are talking about a fascinating paper published in this journal discussing …
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Tree Rings to Understand Climate Extremes and Ecosystem Changes: An Interview with Prof. Zhihong Xu, Griffith University Australia
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Tree rings serve as a natural archive for studying past climate conditions. By analyzing the tree rings, researchers can date the year the tree was growing and reconstruct past droughts, floods, and wildfires. Nitrogen is a critical element for forest ecosystems and its availability affects forest health and productivity. Climate extremes like drou…
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Welcome to "My Sediments Exactly," Springer’s latest geo and earth science podcast where we take nothing for Granite. We’ll be digging and diving, making sure to bring you the best science and scientists to keep you updated on everything geo and earth sciences. ! You'll crack up at the joints and marvel at the faults because, in this show, it's all…
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