Earthquake Science Center Seminars

Earthquake Science Center Seminars episodes:

• 04.24.2024

  Fault damage zone evolution across distributed fault systems: Insights from Ridgecrest, California

  Zachary Smith, University of California Berkley Intense dynamic stresses during earthquakes can activate numerous subsidiary faults and generate off-fault damage that alters fault properties and can impact the source...

  
• 04.10.2024

  Unraveling Multi-Scale Fault Zone Behaviors with Small Earthquake Focal Mechanisms

  Yifang Cheng, Tongji University, Shanghai Earthquake focal mechanisms offer insights into the architecture, kinematics, and stress at depth within fault zones, providing observations that complement surface geodetic measurements and...

  
• 04.03.2024

  Offshore Fault Damage and Slip Behavior: Insights from Microseismicity and Seismic Imaging

  Travis Alongi, U.S. Geological Survey Many of the world’s most damaging faults are offshore, presenting unique challenges and opportunities for studying earthquakes and faults. This talk explores how earthquake-generated...

  
• 03.27.2024

  Variable short-term slip rate on the Imperial fault modulated by filling of the Salton Trough by Lake Cahuilla

  Thomas Rockwell, San Diego State University The Salton Basin was free of significant water between about 100 BCE and 950 CE but has filled to the sill elevation of...

  
• 03.20.2024

  Mechanics of caldera collapse earthquakes and their seismic representations

  Taiyi Wang, Stanford University All instrumented basaltic caldera collapses generate Mw > 5 very long period earthquakes. However, previous studies of source dynamics have been limited to lumped models...

  
• 03.13.2024

  What does the 2024 M 7.5 Noto Hanto, Japan, quake tell us about short-term forecasting and long-term hazard?

  Shinji Toda, Tohoku University The 1 Jan 2024 Noto Hanto earthquake launched a plethora of ills on the Noto Hanto population, taking 200 lives, and causing $25B in damage,...

  
• 03.06.2024

  Tidally modulated icequake periodicity and its implication for rift zone dynamics

  Mong-Han Huang, University of Maryland The Ross Ice Shelf (RIS) in Antarctica is the largest ice shelf in the world. As the RIS flows toward the Ross Sea, a...

  
• 02.28.2024

  Adventures in Measuring Variations in High-Frequency Radiation for Small to Moderate Earthquakes

  Peter Shearer, University of California, San Diego Similar-sized earthquakes vary in the strength of their high-frequency radiation and various modeling assumptions can be used to translate these differences into...

  
• 02.21.2024

  A decade of prospective evaluations of earthquake forecasting models in California: What have we learned and what can we do with it?

  Toño Bayona, University of Bristol The Collaboratory for the Study of Earthquake Predictability (CSEP) is a global community of scientists whose mission is to advance earthquake predictability research though...

  
• 02.14.2024

  Spatial correlation in ground motion intensities: Measurement, prediction, and seismic risk implications

  Jack W. Baker, Stanford University The amplitude of ground shaking during an earthquake varies spatially, due to location-to-location differences in source features, wave propagation, and site effects. These variations...

  
• 01.24.2024

  Probabilistic regional liquefaction hazard and risk analysis: A case study of residential buildings in Alameda, CA (In-person presentation)

  Emily Mongold, Stanford University The impact of liquefaction on a regional scale is not well understood or modeled with traditional approaches. This paper presents a method to quantitatively assess...

  
• 01.17.2024

  The 17 January 1994 Northridge Earthquake: That was Then, This is Now

  (1) Susan Hough, (2) Kate Hutton, (1) U.S. Geological Survey, (2) Caltech (retired) On the 30th anniversary of the 17 January 1994 Northridge, California, earthquake, we present a retrospective...

  
• 01.10.2024

  Extremely Efficient Bayesian Inversions (or how to fit a model to data without the model or the data)

  Sarah Minson, U.S. Geological Survey There are many underdetermined geophysical inverse problems. For example, when we try to infer earthquake fault slip, we find that there are many...

  
• 12.08.2023

  (1) On-going research on EEW in Japan through STAR-E project, (2)Minimum information dependence modeling: a new approach to mixed-domain data analysis with higher-order interaction (in-person presenta

  (1) Stephen Wu, (2) Keisuke Yano, Institute of Statistical Mathematics, Japan (1) Since 2021, the Seismology TowArd Research innovation with data of Earthquake (STAR-E) project has been established by...

  
• 12.06.2023

  USGS/SCEC Community Stress Drop Validation Study (in-person presentation)

  (1) Rachel Abercrombie, (2) Annemarie Baltay, (1) Boston University, (2) U.S. Geological Survey In 2021 we launched the Community Stress Drop Validation Study, focused on the 2019 Ridgecrest earthquake,...

  
• 11.29.2023

  Small-scale propagation of shallow creep events and environmental effects on the San Andreas fault, central California

  Heather Crume, California Geological Survey Surface creep has been documented on the San Andreas fault (SAF) since the 1960s. From Parkfield in the southeast to San Juan Bautista (SJB)...

  
• 11.15.2023

  Wedge Plasticity and a Minimalist Dynamic Rupture Model for the 2011 Mw 9.1 Tohoku-Oki Earthquake and Tsunami

  Shuo Ma, San Diego State University One crucial yet unanswered question about the 2011 Tohoku-Oki earthquake and tsunami is what generated the largest tsunami (up to 40 m) along...

  
• 11.08.2023

  Beyond Phase Picking: PhaseHunter’s Generalizable Approach to Seismic Signal Analysis Using Deep Learning Regression

  Artemii Novoselov, Stanford University This seminar introduces PhaseHunter, a deep learning framework initially designed for the precise estimation and uncertainty quantification of seismic phase onset times. Building upon this...

  
• 11.01.2023

  The Generalized Long-Term Fault Memory Model and Applications to Paleoseismic Records

  James Neely, University of Chicago Commonly used large earthquake recurrence models have two major limitations. First, they predict that the probability of a large earthquake stays constant or even...

  
• 10.25.2023

  Utilizing robotics and machine learning for fault zone mapping and fragile geological feature analysis (in-person presentation)

  Zhiang Chen, California Institute of Technology The intricate and dynamic nature of fault zones and fragile geological features has long fascinated geoscientists and researchers. Understanding these geological phenomena is...

  
• 09.06.2023

  Major southern San Andreas earthquakes modulated by lake-filling events (in-person presentation)

  Ryley Hill, San Diego State University Both natural and anthropogenic hydrologic loads have been associated with stimulating seismicity. However, there are few documented examples that hydrologic loads can trigger...

  
• 08.30.2023

  Earthquake forecasting in a data-rich era (in-person presentation)

  Kelian Dascher-Cousineau, University of California, Berkeley Seismology is witnessing explosive growth in the diversity and scale of earthquake catalogs. A key motivation for this community effort is that more...

  
• 08.23.2023

  What Controls the Earthquake Cycle?

  Christie Rowe, McGill University Earthquake recurrence in time and space is recorded in the rock record (deep/ long term) and sedimentary record (shallow/recent). Mechanistic understandings of earthquakes have...

  
• 08.16.2023

  Incorporating GNSS data into ShakeAlert (in-person presentation)

  Jessica Murray, U.S. Geological Survey

  
• 08.09.2023

  Exploring Fault Evolution, Strength and Stresses in the Crust: Insights from Geodetic Imaging of Surface Rupturing Earthquakes

  Chris Milliner, California Institute of Technology Understanding the mechanics of faulting and accurately assessing seismic hazards are crucial for mitigating the impact of earthquakes. This seminar investigates the use...

  
• 08.02.2023

  Are there geomagnetic precursors to earthquakes? - Two statistical studies from California (In-person presentation)

  Karl Kappler, QuakeFinder Short term (days to hours) earthquake forecasting is a hard scientific problem. Monitoring electromagnetic (EM) rather than mechanical/seismic activity may provide a breakthrough in this research....

  
• 07.26.2023

  Understanding how lithospheric rheology modulates earthquake cycle dynamics and to what extent can rheological parameters be constrained by geodetic observations

  Rishav Mallick, California Institute of Technology Viscoelastic processes in the upper mantle redistribute seismically generated stresses and modulate crustal deformation throughout the earthquake cycle. Geodetic observations of these motions...

  
• 07.19.2023

  Harnessing Fiber Optic Distributed Acoustic Sensing for Earthquake Early Warning (Remote Presentation)

  Itzhak Lior, The Hebrew University of Jerusalem Distributed Acoustic Sensing (DAS) is revolutionizing observational seismology by allowing for seismic measurement every few meters along tens-of-kilometers long optical fibers. One...

  
• 07.12.2023

  Induced Seismicity in the Raton Basin (In-Person Presentation)

  Margaret Glasgow, U.S. Geological Survey Fluid-injection induced seismicity has been ongoing for more than two decades in the Raton Basin, a coal-bed methane field located on the Colorado-New Mexico...

  
• 06.07.2023

  Near-fault velocity structure and ground motions of the 2019 M7.1 Ridgecrest earthquake

  Te Yang Yeh, San Diego State University We have simulated 0–3 Hz deterministic wave propagation in the Southern California Earthquake Center Community Velocity Model (CVM) version CVM‐S4.26‐M01 for the...

  
• 05.31.2023

  Understanding Earthquake Ground Motion Variability from Fault Network Complexity

  Victor Tsai, Brown University Why do earthquakes damage buildings? Many buildings are damaged most heavily by high-frequency ground motion rather than longer period shaking. Despite the importance of these...

  
• 05.24.2023

  Kinematic Earthquake Sequences on Geometrically Complex Faults

  Brendan Meade, Harvard University Computational earthquake sequence models provide generative estimates of the time, location, and size of synthetic seismic events that can be compared with observed earthquake histories...

  
• 05.17.2023

  Variability in Earthquake Rupture Processes and Implications for Ground Motions: Insights from Recent Earthquakes in California and Nevada

  Daniel Trugman, University of Nevada, Reno The level of ground motion felt during an earthquake is controlled primarily by the size of the event and the distance from the...

  
• 04.26.2023

  Next Generation Liquefaction Database and Model Development

  Kenneth Hudson, UCLA Soil liquefaction and resulting ground failure due to earthquakes presents a significant hazard to distributed infrastructure systems and structures around the world. Currently there is no...

  
• 04.12.2023

  Loma Prieta again—Subsurface Geology and the San Andreas Fault in the Southern Coast Range

  Gary Fuis, USGS The 1989 M 6.9 Loma Prieta earthquake is the first major event to occur along the San Andreas fault (SAF) zone in central California since the...

  
• 04.05.2023

  February 6, 2023 earthquakes in Türkiye

  Mustafa Erdik, Bogazici University On Feb. 6, 2023, a magnitude Mw7.8 earthquake struck near Pazarcık City in south-central Türkiye, followed by a magnitude Mw 7.5 event about 9 hours...

  
• 03.29.2023

  February 6, 2023 Kahramanmaraş Earthquakes: An Initial Assessment of Recorded Ground Motions and Observed Damages

  Ayşegül Askan, Middle East Technical University On Feburary 6, 2023, two earthquakes with M7.8 and M7.5 occurred in Southeastern Türkiye only hours apart and caused significant damage and fatalities....

  
• 03.22.2023

  A Retrospective Look at the 1933 Long Beach Earthquake: Historical Context, Impact, and Modern Science

  Susan Hough, USGS At estimated magnitude 6.4, the Long Beach earthquake was only moderately large. Whereas the 1906 San Francisco earthquake had a profound impact on earthquake science,...

  
• 03.15.2023

  Liquefaction or liquefiction? Anthropogenic regulation and the influence of evaporite dissolution on ground failure in the 2019 Mw 7.1 Ridgecrest Earthquake and beyond

  Paula Burgi Remote sensing observations of the 2019 Ridgecrest, California, earthquake sequence revealed a significant amount of surface ejecta in the nearby Searles Lake, including one area where the...

  
• 03.01.2023

  Scalable Monitoring of Infrastructure through Non-dedicated Sensors

  Haeyong Noh, Stanford With increasing urbanization, civil infrastructure plays key roles in connecting, protecting, and supporting this growing population in cities. However, the large stock of aging infrastructure poses...

  
• 02.27.2023

  The November 3, 2002 Mw 7.9 Denali Fault Earthquake, Alaska: It’s Geological, Seismological, and Engineering Legacy

  David Schwartz, Scientist Emeritus, USGS The Mw 7.9 Denali fault, Alaska earthquake of Nov. 3, 2002 was one of only nine earthquakes in shallow continental crust, worldwide, larger than...

  
• 02.15.2023

  ¡Alerta! Engineering on Shaky Ground

  Elizabeth Reddy, Colorado School of Mines The Sistema de Alerta Sísmica Mexicano is the world's oldest public earthquake early warning system. This talk by the author of the...

  
• 02.08.2023

  Megathrust seismicity holes and coronas: What they mean for hazard, and the hunt for prehistoric subduction events

  Ross Stein, Temblor

  
• 01.25.2023

  Absolute stress levels on mature faults: Bridging insight from the lab and field using physics-based modeling

  Valere Lambert Determining principles and conditions governing motion along faults is crucial for assessing how earthquake ruptures start and how large they may ultimately become. One of the most...

  
• 01.18.2023

  Kinematic slip models of four large Intermountain West earthquakes of 2020 and 2021

  Fred Pollitz, USGS Four large earthquakes struck the Intermountain West and Basin and Range Province in 2020 and 2021: M5.7 March 18, 2020 Magna, Utah; M6.5 March 31, 2020,...

  
• 01.04.2023

  How Large Is the Spatial Area Influencing Site Response: Insights Gained from Multidimensional Analyses at the Treasure Island Downhole Array

  Mohamad Hallal, UC Berkeley When attempting to model seismic site effects, most studies have focused on the importance of vertically characterizing subsurface geomaterials. However, laterally characterizing the geomaterials’ variability...

  
• 11.30.2022

  Roles of Dynamic Rupture Simulations in the Development of Next Generation Probabilistic Fault Displacement Hazard Analysis (PFDHA) Models

  Yongfei Wang, SCEC Coseismic fault displacements in large earthquakes have caused significant damage to structures and lifelines located on or near fault lines. For buildings or distributed infrastructure systems...

  
• 11.16.2022

  Subregional anelastic path effects in California

  Tristan Buckreis, UCLA Next Generation Attenuation (NGA) West2 ground motion models (GMMs) include regional path adjustments for broad geopolitical regions. We extend that framework to account for systematic variations...

  
• 11.09.2022

  Seismoelectric effects for subsurface characterization

  Christina Morency, Lawrence Livermore National Laboratory Classical approaches for Earth subsurface imaging rely predominantly on seismic techniques, which alone do not directly capture fluid-specific properties. On the other hand,...

  
• 10.26.2022

  Accessible and Multi-Lingual Earthquake Safety Messaging

  Mark Benthien, Earthquake Country Alliance The Earthquake Country Alliance has created a variety of earthquake safety messaging documents in the top 16 languages spoken and read in California, at...