Meeting Abstracts

The Statewide California Earthquake Center (SCEC) collaborates with academic, government, industry, and other organizations to advance earthquake science, community resilience, and education by: (1) Gathering and analyzing data from field observations and laboratory experiments. (2) Developing system-level models and simulations of earthquake processes to synthesize knowledge as a physics-based understanding of seismic hazard. (3) Communicating that understanding to expand knowledge and reduce earthquake risk.

Participants are invited to present recent work aligned with SCEC priorities during the poster sessions.

Results 101-124 of 124

SCEC ID	Category	Title and Authors	SCEC Award
Poster	FARM	Impacts of Hydrothermal Alteration on Coseismic Slip and Fault Zone Properties at Ridgecrest, California Zachary Smith, Ruyu Yan, Josie Nevitt, William Griffith, Kathryn Materna, Roland Bürgmann, Francis Waligora The nucleation and propagation of earthquake ruptures and seismic waves are influenced by the properties of fault zone rocks and fluids. Hydrothermal alteration impacts both the frictional properties of fault surfaces and bulk elastic properties of... more Themes: Improving Observations and Closing Data Gaps \| Developing Rheologies and Bridging Multi-Scales \| Improving Predictive Analyses of Seismicity	23045
Talk	CCB	Navigating Earthquake Information in the Age of AI: What Science Communicators Need to Know About News and AI Generated Earthquake Content Samantha Stanley, Claire Wardle, Sara McBride Studies suggest that damaging earthquakes lead to abundant news content and people turn to news sources for vital information during disasters. Among questions journalists seek to answer are: What happened and what should we expect in the immediate... more
Poster	Seismology	Ps Receiver Functions in the Presence of Anisotropy Ashley Stroup, Heather Ford The plate boundary between the North American plate and the Pacific plate consists of an expansive network of faults. One region critical for accommodating transform motion is the Walker Lane and Eastern California Shear Zone (WL-ECSZ), which... more Themes: Improving Observations and Closing Data Gaps \| Developing Rheologies and Bridging Multi-Scales
Poster	FARM	Causal Inference-Based Seismic Multi-Hazard Estimation for the 2025 Myanmar Earthquake Yifan Sun, Lingsen Meng, Zhang Yunjun, Yidi Wang, Yanchen Yang, Changyang Hu On March 28, 2025, a Magnitude 7.7 earthquake struck near Mandalay in central Myanmar. The earthquake happened along the Sagaing Fault, and the focal depth was approximately 10 km. It initiated extensive liquefaction, landslides, ground rupture, and... more Themes: Improving Predictive Analyses of Seismicity \| Applied Science Implementation
Poster	CEM	Disseminating, improving and validating 3-D seismic velocity models for California Clifford Thurber I report on progress on three collaborative and inter-related efforts to disseminate, improve, and validate 3-D seismic velocity models for different regions of California, with support from SCEC and the USGS. The main focus is on the northern... more Themes: Improving Observations and Closing Data Gaps \| Research Computing & Cyberinfrastructure	25209, 25229
Talk	FARM	Probing Rupture Dynamics and Ground Motion Signatures from Induced and Natural Earthquakes Elisa Tinti Understanding how ruptures initiate, propagate, and arrest is key to advancing physics-based ground motion simulations and improving seismic hazard assessment. In this presentation, I explore two complementary strategies that integrate observations... more Themes: Improving Observations and Closing Data Gaps \| Advanced Modeling Frameworks \| Improving Predictive Analyses of Seismicity
Poster	Geology	Complex Spatial-Temporal Rupture Patterns of Reverse Faults: The Dunstan Fault, Otago, New Zealand Alex Travers, Mark Stirling, Andrew Gorman , Jonathan Griffin, Dan Clark Tectonic geomorphology resulting from active reverse faulting is highly variable and often complex (E.g. 1988 Spitak earthquake rupture, 2016 Kaikoura rupture). Surface expressions can range from single, well-defined fault scarps to multiple... more
Poster	Geology	Automating Earthquake Field Data Parsing with Machine Learning: From Free-Text to Structured Observations Neeraja Vasa, Harini Pootheri, Edric Pauk, Tran Huynh, Luke Blair, Kate Thomas, Timothy Dawson Spatial data collected from the field after earthquakes is heterogeneous and requires extensive manual post-processing before publication. The field observation dataset from the 2014 Napa earthquake took five years to publish due to paper-based... more Themes: Improving Observations and Closing Data Gaps \| Research Computing & Cyberinfrastructure \| Education and Workforce Development
Poster	FARM	A rock-centric framework for rupture dynamics and its applications in Southern California Binhao Wang, Mingqi Liu, Baoning Wu, Sezim Guvercin, Lei Zhang, Zekang Yang, Caroline Seyler, John Platt, Sylvain Barbot The frictional properties of rocks embedded in fault zones critically influence earthquake nucleation and rupture propagation. Despite detailed knowledge of regional geology and accumulating laboratory constraints on rock friction, we still lack a... more Themes: Developing Rheologies and Bridging Multi-Scales \| Advanced Modeling Frameworks
Poster	Geology	From Coalinga to the Tehachapi Mountains: Recent activity and earthquake potential of blind fault systems in the Southern San Joaquin Valley Robert Welch, Chris Anthonissen, Andreas Plesch, Lluis Salo-Salgado, James Dolan, John Shaw Since August 2024, the Southern San Joaquin Valley has experienced a series of small to moderate magnitude earthquakes on faults within the CFM, as well as systems that are not yet represented in the model. In particular, blind faults in two regions... more Themes: Improving Observations and Closing Data Gaps \| Advanced Modeling Frameworks
Poster	GM	Spatial Variability of Ground Motions due to Rupture Directivity in Seismic Hazard Assessments Kyle Withers, Morgan Moschetti, Jeff Bayless Rupture directivity produces systematic variations in ground motions from the interaction between rupture propagation and the seismic radiation pattern. It can cause significant azimuthal variation in near-fault ground motions at a given source-to-... more Themes: Advanced Modeling Frameworks
Poster	FARM	Reconciling Variability in Finite-Fault Models through Ensemble Dynamic Rupture Simulations: the Role of Stress Heterogeneity in the Tohoku-Oki Earthquake Jeremy Wing Ching Wong, Alice-Agnes Gabriel, Wenyuan Fan Finite-fault models provide detailed imaging of the spatio-temporal evolution of earthquakes, however, large variability among these slip models limits understanding of underlying dynamic rupture processes. The 2011 Mw 9.0 Tohoku-Oki earthquake, one... more Themes: Advanced Modeling Frameworks	25259
Poster	SDOT	Testing the Role of Plasticity on the Frictional Strength of Calcite Gouge with Increasing Normal Stress Sophia Wright Understanding the microphysics of fault friction has implications for scaling laboratory measurements of frictional strength and stability to spatial and temporal scales relevant to tectonic movement. Fault gouge can deform by fracturing, granular... more Themes: Improving Observations and Closing Data Gaps \| Developing Rheologies and Bridging Multi-Scales
Poster	Seismology	Bimaterial Effect and Favorable Energy Ratio Enable Supershear Rupture in the 2025 Myanmar Quake Liuwei Xu, Lingsen Meng, Zhang Yunjun, Yidi Wang, Yanchen Yang, Changyang Hu, Huihui Weng, Wenbin Xu, Elizabeth Su, Chen Ji At 12:51 p.m. local time on March 28, 2025, a magnitude 7.7 earthquake struck near Mandalay, Myanmar. To resolve the rupture process of this major strike-slip event, we applied finite fault inversion and Back-Projection to seismic and geodetic... more Themes: Improving Observations and Closing Data Gaps
Poster	Seismology	Fault geometry from 12 years of relocated earthquakes (2013-2025) near Lake Almanor, Northern California, aided by a nodal deployment Clara Yoon, Robert Skoumal, Jeanne Hardebeck, Rufus Catchings, Mark Goldman, Joanne Chan, Robert Sickler The 2023-05-11 Mw 5.5 Lake Almanor earthquake, and a Mw 5.2 aftershock ~11 hours later, ruptured normal faults in a sparsely instrumented region in Northern California, with only one strong-motion seismic station within 10 km and two broadband... more Themes: Improving Observations and Closing Data Gaps
Poster	FARM	The 2016 Mw 7.8 Kaikōura, New Zealand, Earthquake Triggers Slow Slip Events and Delays Megathrust Earthquakes in Rate-and-State Friction Simulations of the Hikurangi Subduction Zone Jeena Yun, Jeremy Wing Ching Wong, Yuri Fialko, Alice-Agnes Gabriel, Dave May, Laura Wallace, Charles Williams The 2016 Mw 7.8 Kaikōura earthquake triggered slow slip events (SSEs) along the nearby Hikurangi subduction zone (HSZ), which is characterized by quasi-periodic SSEs spanning the entire margin. While large earthquakes have been observed to... more Themes: Advanced Modeling Frameworks \| Improving Predictive Analyses of Seismicity	25259, 25313
Poster	GM	Reducing Apparent Variability and Uncertainty and Improving Ergodic and Non-ergodic Ground Motion Forecasts Using Physics-based Data Yuehua Zeng, Mark Petersen, Norman Abrahamson, Chih-Hsuan Sung, Oliver Boyd, Arthur Rodgers We present a study to reduce large variability and uncertainty in the U.S. National Seismic Hazard Model (NSHM) by integrating physics-based data into the characterization of ground-motion models (GMMs). The approach involves: (1) partitioning the... more Themes: Advanced Modeling Frameworks
Poster	GM	Site-Specific Ground Motion Simulations via Spectral-Scaling Transfer Function Method Esra Zengin, Monica Kohler, Thomas Heaton, Becky Roh This study presents a spectral scaling method for simulating site-specific ground motions for larger-magnitude earthquakes by transforming the Fourier amplitude spectra (FAS) of smaller events within the same source region. The method builds on Aki’... more Themes: Improving Observations and Closing Data Gaps \| Applied Science Implementation
Poster	FARM	The generation of large and small earthquakes due to weak fault zone deformation Peng Zhai, Yihe Huang, Jean-Paul Ampuero Major faults can produce both large and small earthquakes. The variation in earthquake sizes is commonly linked to heterogeneities on the fault itself such as seismogenic asperities and rupture barriers that influence the ultimate size of an... more Themes: Developing Rheologies and Bridging Multi-Scales \| Advanced Modeling Frameworks \| Improving Predictive Analyses of Seismicity	25274
Poster	Seismology	On the origin of seismic signals from concerts and its potential use to monitor stadium health Shane Zhang, Huiyun Guo, Abellaine Murti, Parisa Vazira, Flora Lo, Jacob Chow, Ariel Raymond, Qiushi Zhai, Igor Stubailo, Gabrielle Tepp, Monica Kohler, Zhongwen Zhan Fans’ movement and music from concerts can generate seismic waves, but the exact mechanism and the role of the stadium remain unclear. The Weeknd concert series at SoFi stadium in June 2025 set the record of most sold-out shows and thus provides a... more Themes: Improving Observations and Closing Data Gaps \| Education and Workforce Development \| Outreach and Community Engagement
Poster	EFP	The Collaboratory for the Study of Earthquake Predictability in China: Experiment Design and Preliminary Results of CSEP2.0 Shengfeng Zhang, Yongxian Zhang, Maximilian Werner, Kenny Graham, David Rhoades, José Bayona In earlier CSEP1.0 experiments in China, the PI model was used for alarm-based, intermediate-to-long-term forecasts of earthquakes with magnitude MS ≥ 6.0 in the Yunnan–Sichuan region (Zhang et al., 2016). That study adopted a magnitude cutoff of 3.... more Themes: Developing Rheologies and Bridging Multi-Scales \| Improving Predictive Analyses of Seismicity \| Applied Science Implementation
Poster	Seismology	Favorable tidal stress triggers more tremors with higher energies Siyuan Zhang, Heidi Houston, Shuye Huang, Binhao Wang Tidal stress has been proposed to modulate the occurrence of tremors, low-frequency earthquakes, and even regular earthquakes in certain tectonic settings. Precisely computed tidal loading offers a unique window into earthquake physics. Variations... more Themes: Improving Observations and Closing Data Gaps \| Improving Predictive Analyses of Seismicity
Poster	EFP	A Short-term Earthquake Forecasting Method by Geophysical Signals and Its Application in the China Seismic Experimental Site (CSES) Yongxian Zhang, Zhiwei Ji, Changhui Ju, Shengfeng Zhang We collected real-time geophysical observation data in and around the China Seismic Experimental Site (CSES) in southwest China operated by local earthquake agencies, including 1581 sensors at 193 stations. Among the 1581 sensors, 427 are for... more Themes: Improving Predictive Analyses of Seismicity
Poster	Geodesy	How Can Fault Slip Inversions Be Reliable? Insights from Bayesian Analysis of the 2019 Ridgecrest Earthquakes and Afterslip Xiong Zhao, Junle Jiang Regularization of model parameters is frequently employed to mitigate the ill-posedness of optimization-based fault slip inversion. The Bayesian approach can reveal the full posterior model space without ad hoc regularization, albeit at a higher... more Themes: Advanced Modeling Frameworks \| Improving Predictive Analyses of Seismicity \| Research Computing & Cyberinfrastructure

The Statewide California Earthquake Center is committed to providing a safe, productive, and welcoming environment for all participants. We take pride in fostering a diverse and inclusive SCEC community, and therefore expect all participants to abide by the SCEC Activities Code of Conduct.

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