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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.


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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).

Abstracts should not exceed 2,500 characters in length.

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.

Results 1-19 of 19
SCEC ID Category Title and Authors SCEC Award
FARM A rate-, state-, and temperature-dependent friction law with competing healing mechanisms
Sylvain Barbot
The constitutive behavior of faults is central to many interconnected aspects of earthquake science, from fault dynamics to induced seismicity, to seismic hazards characterization. Yet, a friction law applicable to the range of temperatures found in... more

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

FARM Effect of off-fault plasticity on the dynamics of elongated earthquake ruptures
Ekaterina Bolotskaya, Jean-Paul Ampuero
Large earthquakes saturate the seismogenic width of the fault zone and propagate laterally, developing elongated pulse-like ruptures with large length‐to‐width ratios. Smaller earthquakes can also propagate in a width-bound regime due to... more

Themes: Beyond Elasticity | Modeling Earthquake Source Processes

Seismology Seismicity in the Gulf of California, México, Before and After the El Mayor-Cucapah (Mw7.2) Earthquake of April 2010
Raul Castro, Dana Carciumaru, Hector Gonzalez-Huizar, William Vetel, Antonio Mendoza, Arturo Pérez-Vertti
We analyze the seismicity that occurred in the Gulf of California, México previous and after the occurrence of the 2010 El Mayor-Cucapah (Mw7.2) earthquake. For that purpose, we compile a catalog of earthquakes located in the region of the Gulf of... more

Themes: Stress and Deformation Over Time | Special Fault Study Areas: Focus on Earthquake Gates | Induced Seismicity

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

FARM Constraining the allowable friction parameter space for large-magnitude earthquakes using recurrence patterns from the Alpine fault Hokuri Creek paleoseismic record, New Zealand: Islands of chaos in a sea of periodic earthquakes
Judith Gauriau, Sylvain Barbot, James Dolan
Knowledge about recurrence patterns of large-magnitude earthquakes primarily comes from paleoseismologic studies carried out on large faults. The physics behind the seismic rupture, from its nucleation to its propagation requires the use and... more

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

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
Seismology In-situ Vp/Vs ratio reveals fault-zone material variation at the westernmost Gofar transform fault, East Pacific Rise
Tianze Liu, Jianhua Gong, Wenyuan Fan, Guoqing Lin
Ocean transform faults often generate characteristic earthquakes that repeatedly rupture the same fault patches. The westernmost Gofar transform fault quasi-periodically hosts ~M6 earthquakes every ~5 years, and microseismicity suggests that the... more

Themes: Stress and Deformation Over Time

FARM Dynamic off-fault failure and tsunamigenesis at strike-slip restraining bends: Fully-coupled models of dynamic rupture, ocean acoustic waves, and tsunami in a shallow bay
Shuo Ma
Inelastic off-fault deformation can lead to large tsunamigenesis in different tectonic settings. Here a mechanism for tsunami generation by strike-slip earthquakes that involves dynamic off-fault failure at restraining bends is presented. Dynamic... more

Themes: Beyond Elasticity | Modeling Earthquake Source Processes | Risk to Distributed Infrastructure

Geodesy Constraining the Frictional Strength and State of Stress Along Coseismic Fault Ruptures using 3D Geodetic Imaging Data
Chris Milliner, Saif Aati, Jean-Philippe Avouac
Constraining the variation of stress on faults is important for improving our understanding of fault friction and the dynamics of earthquake ruptures. However, we still have little observational constraints on their absolute magnitude, or their... more

Themes: Stress and Deformation Over Time | Beyond Elasticity | Risk to Distributed Infrastructure

FARM The role of sediments and fault damage on the 2019 Ridgecrest earthquake: a rupture impediment and/or ground motion amplifier?
Elif Oral, Jean-Paul Ampuero, Domniki Asimaki
Observations of the 2019 M 7.1 Ridgecrest earthquake reveal a slow rupture (~ <= 2 km/s) and near-field ground motions with high spatial variability. The area is well characterized with sedimentary layers and low-velocity fault damage zones, but... more

Themes: Modeling Earthquake Source Processes | Beyond Far-Field Approximations | Ground Motion Simulation

Seismology Caution: The prediction inconsistency of neural phase pickers should not be overlooked
Yongsoo Park, Gregory Beroza, William Ellsworth
Neural phase pickers – neural networks that are designed and trained to pick seismic phase arrivals – have shown to be a powerful tool for developing earthquake catalogs. However, these pickers suffer from what we refer to as prediction... more

GM Ground-Motion Predictions for Salton Trough Using Cross-Pollinated Earth Models
Patricia Persaud, Rasheed Ajala
Strategies for improving Earth models to better predict the seismic wavefield are an active research topic in earthquake hazard studies. Such models should include realistic representations of fault zones, sedimentary basins, and other small-scale... more

Themes: Community Models | Ground Motion Simulation | Probabilistic Seismic Hazard Analysis

19014, 20023, 21059
Geology Late Holocene rupture history of the Ash Hill Fault (ECSZ) and the potential for seismogenic strain transfer between adjacent fault systems
Christine Regalla, Shannon Mahan, Eric Kirby, Eric McDonald, Aubrey LaPlante
The eastern California Shear Zone (ECSZ) contains networks of crustal faults that accommodate strain transfer across geometrically complex fault systems. Large magnitude earthquakes appear able to rupture across adjacent fault systems, but... more

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

EFP Magnitude and Slip Scaling Relations for Fault-Based Seismic Hazard
Bruce Shaw
Scaling relations play an important role in fault-based seismic haard, where slip rates on faults are balanced by cumulative slip in an earthquake rupture forecast. Here we discuss a series of issues which arise in constructing sets of logic tree... more

Themes: Modeling Earthquake Source Processes | Probabilistic Seismic Hazard Analysis

Seismology Revisiting the Ridgecrest aftershock catalog using a modified source-scanning algorithm applied to multiple dense local arrays
Eyal Shimony, Asaf Inbal, Ariel Lellouch
The two major Ridgecrest earthquakes of July 2019 were followed by numerous aftershocks. A temporary, spatially dense array was deployed over the summer of 2019 in order to monitor the aftershock activity. The array’s density and scale offer a... more

Themes: Community Models | Modeling Earthquake Source Processes

EFP Targeting Temporal Seismicity with a Neural Point Process
Sam Stockman, Dan Lawson, Maximilian Werner
Point processes have been the dominant way of describing the evolution of seismicity for a while, with the Epidemic Type Aftershock Sequence (ETAS) model being the most successful. Recent advances in the field of machine learning have constructed... more

Themes: Operational Earthquake Forecasting

FARM Pulse-like ruptures, seismic swarms, and tremorgenic slow-slip events with thermally activated friction
Binhao Wang, Sylvain Barbot
The evolution of frictional resistance on a fault affects the characteristics of seismic ruptures. A wide range of rupture styles, from slow-slip events to fast earthquakes, can be explained under the isothermal rate- and state-dependent friction... more

Themes: Modeling Earthquake Source Processes

FARM Hindcasting injection-induced aseismic slip and microseismicity at the Cooper Basin Enhanced Geothermal Systems Project
Taiyi Wang, Eric Dunham
There is a growing recognition that subsurface fluid injection can produce not only earthquakes, but also aseismic slip on faults. A major challenge in understanding interactions between injection-related aseismic and seismic slip on faults is... more

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

EFP How epistemic uncertainty of sub-surface fault geometry affects large earthquakes recurrence variability
The geometric complexity of fault surfaces (i.e., their fault roughness) strongly influences seismotectonic behavior, affecting the initiation, propagation, and termination of individual earthquakes as well as the stress-slip relationship, fault... more

Themes: Stress and Deformation Over Time | Modeling Earthquake Source Processes | Probabilistic Seismic Hazard Analysis

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.