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Meeting Abstracts

SCEC Annual Meeting participants are invited to share recent results and activities relevant to SCEC priorities and initiatives during the poster sessions. The SCEC collaboration emphasizes the connections between information gathering by sensor networks, fieldwork, and laboratory experiments; knowledge formulation through physics-based, system-level modeling; improved understanding of seismic hazard; and actions to reduce earthquake risk and promote resilience.

Use the search form to view abstracts of presentations that have been accepted for this meeting.


A SCEC username is required to submit an abstract.

The person submitting the abstract is automatically the First Author, and will receive all communications regarding the abstract.

A First Author can have a maximum of one poster and one oral presentation (if invited as a plenary speaker).

Each "poster space" in the online gallery will include general poster information, author contact information, and a PDF of the poster, as well as optional short videos about the poster.

First Authors of accepted abstracts will receive more detailed instructions.

During the meeting, posters are presented in three groups: A (Monday September 12), B (Tuesday September 13), and C (Online Only). See the SCEC2022 agenda and FAQ for more details.

Results 51-100 of 301
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SCEC ID Category Title and Authors SCEC Award
Group C
Poster 234
GM Investigating the Basin Effect on Ground Motions Using Laboratory Seismic Data Based on 3D-Printed Los Angeles Basin Structure
Sifang Chen, Jiong Wang, Sunyoung Park
Earthquake ground motion is greatly affected by small-scale features such as surface topography and basins, and quantifying the influence of these structures is crucial in seismic hazard analysis. In particular, understanding the basin effect is of... more

Themes: Community Models | Ground Motion Simulation | Velocity and Rheology of Basin Sediments

Group B
EEII Shakebot: a low-cost, open-source shake table for structural seismology research
Zhiang Chen, Devin Keating, Yash Shethwala, Aravind Adhith Pandian Saravanakumaran, Jnaneshwar Das, Ramon Arrowsmith, Christopher Madugo, Albert Kottke
Our previous study built a virtual shake robot to simulate dynamics of precariously balanced rocks (PBR); however, simulation results need to be validated through physical experiments. We have developed a low-cost, open-source shake table, also... more

Themes: Ground Motion Simulation | Induced Seismicity | Public Education and Preparedness

Group B
SAFS Fine-scale complex fault structure and slip along the San Andreas Fault: Contrasting seismic behaviors in localized and diffuse fault zones
Yifang Cheng, Roland Bürgmann, Richard Allen
The central San Andreas Fault exhibits diverse modes of seismic and aseismic deformation along a highly localized fault zone. Although the main fault trace appears as a simple planar fault structure, small earthquakes reveal a highly complex fault... more

Themes: Stress and Deformation Over Time | Community Models | Beyond Elasticity

Group B
Poster 120
CS Numerical modeling of ground surface deformation related to thrust and reverse fault earthquakes: A discrete element approach
Kristen Chiama, Andreas Plesch, Robb Moss, John Shaw
Ground surface ruptures during large earthquakes pose significant hazards to urban environments, critical information and energy transmission infrastructure, transportation systems, as well as other sensitive facilities. We seek to improve our... more

Themes: Risk to Distributed Infrastructure

Group A
Seismology How is fault complexity linked to high-frequency radiation from Southern California earthquakes?
Shanna Chu, Annemarie Baltay, Victor Tsai, Rachel Abercrombie, Greg Hirth, Daniel Trugman
Fault complexity has been linked to enhanced high frequency radiation in earthquakes, but the specific relationships between earthquake source complexity, the radiated spectrum and what kind of physical mechanisms are involved are still not well... more

Themes: Modeling Earthquake Source Processes | Ground Motion Simulation

Group B
Seismology Relative Afterslip Moment Does Not Universally Control Aftershock Productivity, But Do Special Case-studies Reveal More Nuance?
Robert Churchill
Aseismic afterslip is postseismic fault sliding that may significantly redistribute crustal stresses and drive aftershock sequence. However, evidence for the link between afterslip and aftershocks is mostly case-study based, including observations... more

Themes: Stress and Deformation Over Time | Probabilistic Seismic Hazard Analysis | Operational Earthquake Forecasting

Group A
Poster 021
Seismology Earthquake Early Warning with Graph Learning
Tim Clements, Elizabeth Cochran, Sarah Minson, Annemarie Baltay, Clara Yoon
We introduce a graph learning-based algorithm for earthquake early warning (EEW). The goal of EEW is to characterize when and where strong ground motion is expected as soon as possible after an earthquake starts. EEW systems currently in use across... more

Themes: Data-Intensive Computing | Earthquake Early Warning

Group B
Seismology Real-time performance and new developments of the Propagation of Local Undamped Motion (PLUM) earthquake early warning algorithm for the West Coast, U.S.A.
Elizabeth Cochran, Jessie Saunders, Annemarie Baltay, Julian Bunn, Tim Clements, Debi Kilb, Sarah Minson, Colin O'Rourke, Clara Yoon
We present real-time performance and new developments of the Propagation of Local Undamped Motion (PLUM) earthquake early warning algorithm that is being tested prior to inclusion in the ShakeAlert system. The ShakeAlert System operates in... more

Themes: Earthquake Early Warning

Tue 1400
Seismology Recent progress in illuminating fault structure and behavior using seismology
Elizabeth Cochran
Seismology provides unique tools to probe the structure and behavior of fault slip zones across a range of depths and throughout the earthquake cycle. New fault observations have been enabled by improved use of existing data and recent growth of... more

Group A
GM Porting AWP-ODC to next generation architectures: the Characteristic Scientific Application project
Yifeng Cui, Scott Callaghan, Yiming Ren, Lars Koesterke, Wenyang Zhang, Mattew Norman, Daniel Roten, Philip Maechling, Christine Goulet
AWP-ODC is a SCEC community software program designed, and widely used, to perform large-scale, highly-parallel, physics-based earthquake rupture and wave propagation simulations. AWP-ODC currently achieves excellent speedup and efficiency on multi-... more

Themes: Data-Intensive Computing | Ground Motion Simulation | Probabilistic Seismic Hazard Analysis

Tue 0800
CEO Towards Inclusive Teaching Through Online Learning: An Example from ROSES (Remote Online Sessions for Emerging Seismologists)
Fransiska Dannemann Dugick

Wed 0800
EFP Flexible and Scalable Earthquake Forecasting
Kelian Dascher-Cousineau, Oleksandr Shchur, Emily Brodsky, Stephan Gunnemann
Seismology is witnessing explosive growth in the diversity and scale of earthquake catalogs owing to improved seismic networks and increasingly automated data augmentation techniques. A key assumption in this community effort is that more detailed... more

Themes: Data-Intensive Computing | Probabilistic Seismic Hazard Analysis | Operational Earthquake Forecasting

Group C
Geology 2022 updates regarding slip rates along Patagonia's fastest slipping strike strip faults: the Magallanes Fault (MF) and Liquiñe-Ofqui fault zone (LOFZ)
Gregory De Pascale, Sebastian Perroud, Francisca Sandoval, Manuel Hernandez, Mario Persico
Major plate boundary strike slip fault systems in Chilean and Argentine Patagonia provide important insight to crustal tectonics. Prior to 2020, slip rates along the Liquiñe-Ofqui fault zone (LOFZ) and the Magallanes Fault System (MFS) in Chile and... more

Themes: Stress and Deformation Over Time | Special Fault Study Areas: Focus on Earthquake Gates | Probabilistic Seismic Hazard Analysis

Group B
Seismology Ubiquitous Earthquake Dynamic Triggering in Southern California
Nicolas DeSalvio, Wenyuan Fan
Earthquakes can be dynamically triggered by the passing waves of events from disconnected faults. The frequent occurrence of dynamic triggering offers tangible hope in revealing earthquake nucleation processes. However, the physical mechanisms... more

Group A
CEO Integration of the California faults into virtual reality: preliminary results using the gaming engine Unity
Saul Diaz, Christodoulos Kyriakopoulos
Today we are living in the new age of information, and countless tools are being developed that change the way humans consume information. These tools are currently being utilized mainly by the private sector to create new forms of entertainment,... more

Themes: Public Education and Preparedness | Experiential Learning and Career Advancement

Group B
Poster 058
Seismology Moment Tensor Catalog for California Using 3D Green's Functions
Claire Doody, Arthur Rodgers, Andrea Chiang, Michael Afanasiev, Christian Boehm, Lion Krischer, Nathan Simmons
Accurate moment tensors are vital for our understanding of earthquake processes and stress regimes in tectonically active regions. Most moment tensor computations are done using one-dimensional velocity models to compute Green’s Functions, as 1D... more

Themes: Community Models | Data-Intensive Computing

Group A
Seismology Using seismic data to directly invert for the dynamic stress evolution during earthquake rupture
Benchun Duan, Qingjun Meng, Dunyu Liu, Yongen Cai
The static stress drop value and dynamic stress evolution process during earthquake rupture provide essential information of fault frictional behavior that governs earthquake rupture dynamics. At present, most of earthquake stress drop and evolution... more

Themes: Stress and Deformation Over Time | Modeling Earthquake Source Processes

Group B
FARM Multiscale Modeling of Damage Mechanics in Fault Zones
Ahmed Elbanna, Alice-Agnes Gabriel, Yehuda Ben-Zion
Natural faults are surrounded by regions of damaged rocks. Damaged fault zones evolve both co-seismically and inter-seismically. It is thus important to include inelastic strain processes on- and off-fault in modeling of individual rupture dynamics... more

Themes: Stress and Deformation Over Time | Beyond Elasticity | Beyond Far-Field Approximations

Group A
SDOT Inverting for interseismic deep slip on closely spaced faults using surface velocities and stressing rate tensors
Hanna Elston, Michele Cooke, Jack Loveless, Scott Marshall
Debate persists about the partitioning of active strike-slip between the southern and northern pathways of the southern San Andreas fault (SSAF) through the San Gorgonio Pass. Inversions of interseismic surface velocities that are often used to... more

Themes: Stress and Deformation Over Time

21020, 20055
Group A
Geodesy A dense block model of western continental United States deformation for the 2023 update to the National Seismic Hazard Model
Eileen Evans
Seismic hazard assessment, such as the United States Geological Survey (USGS) National Seismic Hazard Model (NSHM), relies on estimates of long-term fault slip rate based on geology and/or geodetic observations such as the Global Navigation... more

Themes: Community Models | Probabilistic Seismic Hazard Analysis

Group B
Poster 132
FARM Inner California Borderland High-Resolution Fault Mapping: Rose Canyon Fault Releasing Stepover in San Diego Bay Pull-apart Basin
Andrea Fabbrizzi, Eui-jo Marquez, Drake Singleton, Jillian Maloney, Thomas Rockwell, Neal Driscoll, Scott Rugg
The releasing stepover in San Diego Bay is characterized by a pull-apart basin geometry between the southern termination of the Rose Canyon fault around downtown San Diego and the Descanso fault offshore along the USA-Mexico coastline. Although the... more

Themes: Stress and Deformation Over Time | Special Fault Study Areas: Focus on Earthquake Gates | Probabilistic Seismic Hazard Analysis

Group A
Seismology Finite-source attributes of M 4 to 5.5 Ridgecrest, California earthquakes
Wenyuan Fan, Haoran Meng, Daniel Trugman, Jeff McGuire, Elizabeth Cochran
Resolving earthquake rupture processes is essential for understanding earthquake physics and determining seismic hazards. However, it remains challenging to solve the finite-source attributes of moderate and small earthquakes directly; rupture... more

Themes: Modeling Earthquake Source Processes

20115, 21055
Group A
CEO Expanding SCEC Engagement: New Social Media Approaches with the Public and New Connections with Member Institutions
Cameron Fetter, Bryan Castillo, Mark Benthien
Ensuring that the general public and our schools are informed of earthquake hazards is one of the utmost priorities of the Southern California Earthquake Center (SCEC) Communication Education, and Outreach program. The main goal of this project was... more

Themes: Public Education and Preparedness

Group A
Geology Surface deformation associated with the Mw 5.1 Sparta, North Carolina earthquake and evidence of recurrent Quaternary surface ruptures in an intraplate setting
Paula Figueiredo, DelWayne Bohnenstiehl, Arthur Merschat, Mark Carter, Karl Wegmann, Matthew Ricker, Lewis Owen
The shallow Mw 5.1 Sparta, North Carolina 2020 earthquake was triggered on an unknown fault in an intraplate setting with low tectonic stress. Surprisingly, initial field surveys identified a surface rupture, expressed by reverse scarps and/or... more

Themes: Stress and Deformation Over Time | Probabilistic Seismic Hazard Analysis | Post-Earthquake Rapid Response

Group A
CXM A summary of the Community Geodetic Model products, availability and future
Michael Floyd
On behalf of the Community Geodetic Model Working Group, we present a summary of the Community Geodetic Model achievements, products and availability during the SCEC 5 project. We show how the GNSS and InSAR products are generated and how they... more

Themes: Community Models

21026, 21035, 21019, 21060, 21151
CEO SCEC Sponsor Remarks: Federal Emergency Management Agency (FEMA)
Jon Foster
Agency representatives provide their perspectives on future directions relevant to the SCEC community.

Group B
Poster 086
Geology Refining the record of incremental slip rate and paleo-earthquake ages for the western and central segments of the Garlock fault
Dannielle Fougere, James Dolan, Sally McGill, Andrew Ivester, Ed Rhodes
An increasing inventory of paleoseismic data indicate that whereas some faults experience relatively regular earthquake recurrence, many other faults exhibit earthquake recurrence that is highly irregular in both time and space. Moreover,... more

Themes: Stress and Deformation Over Time

Group B
CEO Re-enfranchising communities in the wake of COVID-19: Lessons learned during the pandemic for reaching underserved schools with earthquake science
Armando Franco, Austin Elliott, Susan Garcia, Katherine Scharer, Jessica Murray, Adria McClain, Andrew Michael
In “Impact of COVID-19 on Science Education” the Public Policy Institute of California reports 62% of school districts deprioritized science education during academic year 2021-2022 due to limited support and resources. Only 40% of school districts... more

Themes: Public Education and Preparedness

Group B
Poster 250
SAFS Loma Prieta Again: Subsurface Geology and the San Andreas Fault, Santa Cruz Mountains, Central California
Gary Fuis, Rufus Catchings, Daniel Scheirer, Klaus Bauer, Mark Goldman, Tait Earney, Guoqing Lin, Edward Zhang
The 1989 Mw 6.9 Loma Prieta earthquake is the first major event to occur along the San Andreas fault (SAF) zone in central California since the 1906 M 7.9 San Francisco earthquake. Given the complexity of this event, uncertainty has persisted as to... more

Themes: Modeling Earthquake Source Processes | Velocity and Rheology of Basin Sediments

Mon 1400
Geodesy Northern Exposure: Why you should consider studying the faults of northern California
Gareth Funning
In its next incarnation, SCEC plans to expand its region of interest in all directions, to become a truly statewide earthquake center. Given SCEC’s past priorities and future goals, I believe the faults of the northern San Andreas system provide... more

Themes: Stress and Deformation Over Time | Community Models | Data-Intensive Computing

21035, 20177
Group A
FARM Fault-size dependent fracture energy and multi-scale earthquake rupture cascades
Alice-Agnes Gabriel, Dmitry Garagash, Kadek Palgunadi, Paul Martin Mai
Faults and fractures that host dynamic slip are known to vary over more than six orders of magnitude in source dimensions. Connected multi-fault systems on large (e.g., the Ridgecrest fault system) and small (e.g., fracture networks and damage zones... more

Themes: Modeling Earthquake Source Processes

Group A
FARM Off-Fault deformation along the Superstition Hills and Elsinore Faults: Is there a fingerprint of Mmax preserved in fault damage zones?
Hannah Gaston, William Griffith, Thomas Rockwell
This study is driven by previous research that compares the fracture energy (G) for both laboratory and natural earthquakes, where energy for earthquakes smaller than Mw6.6 is dissipated primarily by frictional heating. Earthquakes larger than Mw6.8... more

Themes: Probabilistic Seismic Hazard Analysis

Group A
Poster 131
FARM Islands of chaos in a sea of periodic earthquakes: Constraining the allowable friction parameter space for large-magnitude earthquakes using recurrence patterns from the Alpine fault Hokuri Creek paleoseismic record, New Zealand
Judith Gauriau, Sylvain Barbot, James Dolan
Earthquake recurrence patterns on some faults derive from paleoseismic records that challenge time- and slip-predictable models. Such records are often categorized as clustered, random, or quasi-periodic according to the coefficient of variation (... more

Themes: Stress and Deformation Over Time | Modeling Earthquake Source Processes

Group A
Seismology Very low frequency earthquakes (VLFEs) offshore Cascadia – a new window to megathrust slip and frictional behavior
Abhijit Ghosh, Kuntal Chaudhuri
Cascadia megathrust produces M9 earthquakes, the last one being more than 300 years ago. Little is known about the slip behavior of the megathrust and its variability as the seismogenic zone of the fault lies offshore with minimal recorded seismic... more

Group A
Poster 139
FARM Testing rheological models for creep events using their temporal evolution
Daniel Gittins, Jessica Hawthorne
Along the central creeping section of the San Andreas Fault, aseismic slip does not occur at a steady rate. Instead, bursts of slip known as creep events regularly punctuate a steady background slip rate and can accommodate upwards of 50% of the... more

Themes: Stress and Deformation Over Time

Group A
Poster 061
Seismology Real-Time Seismogeodetic Earthquake Magnitude Estimates for Local Tsunami Warnings
Dorian Golriz, Barry Hirshorn, Yehuda Bock, Stuart Weinstein, Jonathan Weiss
Tsunami Warning Centers (TWCs) use a variety of tools to issue a tsunami warning based on the size and location of the earthquake. However, current methods that rely on seismic data alone suffer from magnitude saturation or not timely enough for... more

Themes: Modeling Earthquake Source Processes | Earthquake Early Warning | Post-Earthquake Rapid Response

Group A
Seismology A Minimized Site Characterization Method to Estimate VS30 using VR40
Jose Gomez, Alan Yong, Koichi Hayashi, Antony Martin, Andrea Di Martino, Tara Nye, Lilah Guerra, Jamison Steidl
We estimate VS30, the time-averaged shear wave velocity of the upper 30 m from the ground surface, using a novel minimal site characterization method (MSCM) based on correlations with VR40, the Rayleigh-wave phase velocity at the 40 m wavelength... more

Group A
Seismology Seismicity, fault architecture, and slip mode of the westernmost Gofar transform fault
Jianhua Gong, Wenyuan Fan
Oceanic transform faults accommodate plate motions through both seismic and aseismic slips. However, deformation partition and slip mode interaction at these faults remain elusive mainly limited by rare observations. We use one-year ocean bottom... more

Group C
Geodesy Plate tectonics in the Gulf of California: back to the beginning.
Jose Javier Gonzalez-Garcia
From the beginning of the geometric formulation of the theory of Plate Tectonics the Gulf of California was considered as a substantive source of data. Going back, I use the model Geodvel (Argus et.al, 2010) for the boundary between the North... more

Themes: Stress and Deformation Over Time

Group A
Seismology New observations of earthquakes and tremor dynamically triggered in Mexico
Hector Gonzalez-Huizar
In this study, the results of an intense search for tremor and earthquakes triggered in Mexico by the seismic waves from distant earthquakes is presented. The search for triggered events focuses along the Middle American Trench, one of the most... more

Themes: Stress and Deformation Over Time

Group A
EEII A Seismologically Consistent Model for Surface Rupture Length Capturing Unbounded and Width-Limited Events
Christine Goulet, Grigorios Lavrentiadis, Yongfei Wang, Norman Abrahamson, Yousef Bozorgnia
A surface-rupture-length (SRL) relationship as a function of magnitude (M), fault thickness, and fault dip angle is presented. The objective of this study is to model the change in scaling between unbounded and width-limited ruptures. This is... more

Themes: Ground Motion Simulation | Probabilistic Seismic Hazard Analysis | Risk to Distributed Infrastructure

Group A
Poster 109
Geology Possible recent fault scarp near Montréal - candidate fault for the 1732 M5.8 Earthquake
Aube Gourdeau, Veronica Prush, Christie Rowe
Montréal falls within the Western Quebec Seismic Zone (WQSZ). The WQSZ is a region of elevated but poorly defined earthquake risk with several historic, damaging earthquakes. In 1732, a M5.8 earthquake caused significant damage in the Montréal area... more

Group A
EFP Current State of New Zealand’s Operational Earthquake Forecasting (OEF)
Kenny Graham, Annemarie Christophersen, Matthew Gerstenberger, David Rhoades
In New Zealand, GNS Science through the GeoNet programme is the official provider of earthquake forecast information to help communities understand how earthquake sequences might evolve and aid recovery and future resilience planning. Such... more

Themes: Community Models | Probabilistic Seismic Hazard Analysis | Operational Earthquake Forecasting

Tue 1400
Geology Can we identify fingerprints of seismic rupture in fault damage zones?
William Griffith, Caje Kindred Weigandt, Hannah Gaston, Thomas Rockwell
Inelastic yielding in fault damage zones during rupture propagation has important implications for the earthquake energy budget, static and dynamic triggering, seismic radiation, and fault zone permeability. Fault damage zones develop through a... more

Themes: Stress and Deformation Over Time | Beyond Elasticity | Velocity and Rheology of Basin Sediments

20027, 21043, 22116
Group A
Seismology A Case Study Exploring Azimuthal Dependence of Peak Ground Acceleration: Motivated by Observations from the 29 May 2013 Isla Vista M4.8 Earthquake
Lilah Guerra, Alan Yong, Tara Nye, Andrea Di Martino, Jose Gomez, Jamison Steidl, Antony Martin, Koichi Hayashi, Alessandro Amorosi, Ali Shafiee
During the M4.8 2013 Isla Vista Event, seismic stations CE.25932 and CI.USB recorded anomalous peak ground acceleration (PGA) values. We consider the role of path effects; specifically, the azimuthal dependence of PGA for this region to see if this... more

Themes: Velocity and Rheology of Basin Sediments

Group B
Poster 070
Geodesy Investigating Active Crustal Deformation along the San Andreas Plate Boundary from 7+ Years of Combined Sentinel-1 InSAR + GNSS Time Series
Katherine Guns, Xiaohua Xu, David Sandwell, Yehuda Bock
Interferometric Synthetic Aperture Radar (InSAR) datasets have come to revolutionize how we monitor, explore, and characterize crustal processes through surface observations. With the recent rise of increased temporal and spatial resolution... more

Themes: Stress and Deformation Over Time | Community Models

Group A
Geology Seismic Indicators of Fault Maturity
Huiyun Guo, Thorne Lay, Emily Brodsky
Earthquake generating fault systems span a wide range of fault maturity, from evolving segmented fracture systems with minor offsets to strongly localized primary faults with large cumulative offsets. Many large continental strike-slip earthquakes... more

Themes: Special Fault Study Areas: Focus on Earthquake Gates

Group B
FARM The Ingredients Needed for Realistic Dynamic Earthquake Rupture Simulations
Ruth Harris
Many mysteries about earthquake mechanics remain unsolved, including significant questions about what causes large earthquakes to stop after they have started propagating and which physical processes of the earthquake source are most likely to... more

Themes: Modeling Earthquake Source Processes

21127, 20188, 19121, 18217
Group A
CXM Testing Community Velocity Models of Southern California using Gravity Modeling
Masooma Hasnain, Simon Klemperer
Southern California Earthquake Center (SCEC) has developed two distinct community models, CVM-H and CVM-S, that span Southern California. Many other models have been produced for the same region, e.g. Barak et al. (2015, G-cubed, hereafter BKL-15).... more

Themes: Community Models

Group A
Seismology The 1981 – 2022 Southern California Seismic Network Waveform Relocated and Focal Mechanisms Catalogs: New Seismological and Tectonic Insights
Egill Hauksson, Peter Shearer
We have refined and updated the catalogs of earthquake hypocenters (Hauksson et al., 2012) and focal mechanisms (Yang et al., 2012) for southern California. The SCSN waveform relocated catalog that consists of 40 years of ~800,000 relocated... more

Themes: Stress and Deformation Over Time | Community Models | Modeling Earthquake Source Processes


The Southern 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.