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Meeting Abstracts

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 form below to search and view all poster and invited talk abstracts submitted to 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.

First Authors can submit a maximum of one poster presentation abstract and one oral presentation abstract (if invited as a plenary speaker).

Abstracts should not exceed 2,500 characters in length.

Every poster will be on display from Sunday evening through Tuesday evening.

Poster dimensions cannot exceed 45 inches high x 45 inches wide.

You may upload a PDF of your poster at any time, even after the submission deadline.

Results 51-100 of 355
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SCEC ID Category Title and Authors SCEC Award
Poster 079
Geology Fault Scarp Degradation Analysis At Dragon’s Back Using High Resolution Topography Data
Emil Chang, Gilles Peltzer, Seulgi Moon
Fault scarps degrade over time, and their geomorphic forms may provide information of relative activity of surface processes or formation ages. The recent advances in remote sensing techniques and high-resolution topographic data allow us to... more

Seismology Low wave speed zones in the crust beneath SE Tibet revealed by ambient noise adjoint tomography
Min Chen, Hui Huang, Huajian Yao, Rob van der Hilst, Fenglin Niu
We present a refined 3D crustal model beneath SE Tibet from ambient noise adjoint tomography. Different from ray-theory-based tomography, adjoint tomography in this study incorporates a spectral-element method (SEM) and takes empirical Green’s... more

Seismology Data-driven ambient noise correlation for characterization and fragility evaluation in power grids
Qianli Chen, Ahmed Elbanna
The response of ambient noise has been used to cross correlate and extract the Green’s function for general hyperbolic PDE’s in many fields including acoustics, seismology and helioseismology. The equipartitioning of wave field enable the successful... more

Seismology Seismicity and spectral analysis in Salton Sea Geothermal Field
Yifang Cheng, Xiaowei Chen
The surge of “man-made” earthquakes in recent years has led to considerable concerns about the associated hazards. Improved monitoring of small earthquakes would significantly help understand such phenomena and the underlying physical mechanisms. In... more
14097, 16061
FARM Multi-Scale Flash Heating and Frictional Weakening at Seismic Slip-Rates in Rock
Frederick Chester, Omid Saber, J. L. Alvarado
Sliding rock-samples at rates > 1 mm.s^-1 can lead to a significant reduction of friction, often referred to as dynamic weakening. Thermal effects are understood to be the cause of dynamic weakening, and the Flash Weakening (FW) mechanism that... more

Poster 348
CS SeedMe: Data sharing building blocks
Amit Chourasia, David Nadeau, John Moreland, Dmitry Mishin, Michael Norman
Computational simulations have become an indispensible tool in a wide variety of science and engineering investigations. Nearly all scientific computation and analyses create important transient data and preliminary results. These transient data... more

EFP Testing the effect of deficient real-time earthquake catalogs on non-Poissonian earthquake likelihood models: Examples from the Canterbury earthquake sequence
Annemarie Christophersen, David Rhoades, David Harte, Matthew Gerstenberger
The still on-going Canterbury earthquake sequence has provided us with a wealth of seismological data. Among them are a series of near-real time earthquake catalogs that show the deficiency of real-time data. For example, while the final GeoNet... more
Seismology Deformation of the Xishancun Landslide, Sichuan, inferred from seismicity
Risheng Chu
Unstability of landslides, e. g. the slope movement and the internal fracturing of the rock mass, can often generate microseismicity, which is recorded as seismic signals on seismographs. The temporal and spatial distribution of the unstable regions... more

Poster 046
FARM Localization and delocalization of shear in fault gouge from thermal pressurization
Shanna Chu, Eric Dunham
Field observations of extreme shear localization in fault gouge have been attributed to a number of factors, including thermal pressurization. The extent of the localization is affected by various parameters such as diffusion, friction, and gouge... more

Seismology Ground Motion Amplitude Variations in the Los Angeles Region Measured by the Community Seismic Network
Robert Clayton, Robert Sanchez, Julian Bunn, Richard Guy
We show variations in ground motion amplitude in the Pasadena and northern Los Angeles regions due to the Borrego-Springs earthquake (2016/06/10, M5.2) and other earthquakes in 2015-2016. The measurements are from the Community Seismic Network... more

Seismology ShakeAlert Testing and Certification Platform: Point Source and Ground Motion Based Evaluations
Elizabeth Cochran, Monica Kohler, Douglas Given, Jennifer Andrews, Men-Andrin Meier, Egill Hauksson, Sarah Minson, Mohammad Ahmad, Jonathan DeLeon, Stephan Guiwits
An earthquake early warning system, ShakeAlert, has been developed over the last decade through a collaboration between the U.S. Geological Survey and its partners. ShakeAlert messages are composed of point source information generated by three... more

Poster 025
FARM Biomarkers as a tool to measure coseismic temperature rise
Genevieve Coffey, Heather Savage, Pratigya Polissar, Brett Carpenter, Cristiano Collettini
During earthquake slip, frictional resistance within a fault can lead to the generation of extremely high temperatures. As a consequence, investigating temperature rise within fault zones provides a promising mechanism for the detection of past... more

GMSV Simulation of multi-segment kinematic rupture of the 1992 Landers earthquake and ground motion validation of ground motion
Jorge Crempien, Ralph Archuleta
The ability of earthquake rupture to jump across faults, or to propagate on complex faults with multiple bends can significantly affect the ground motion different sites might experience in the near source region. Based on the dynamic rupture... more
Talk 9/14 09:00
EEII Progress Report of the SCEC Utilization of Ground Motion Simulations (UGMS) Committee
C.B. Crouse, Thomas Jordan
The goal of the UGMS committee, since its inception in the spring of 2013, has been to develop digital long-period response spectral acceleration maps for the Los Angeles region, for inclusion in the NEHRP and ASCE 7 Seismic Provisions and in the... more

Geodesy Single station automated detection of transient deformation in GPS time series with the relative strength index: A case study of Cascadian slow-slip
Brendan Crowell, Yehuda Bock, Zhen Liu
The discovery of transient slow-slip events over the past decades has changed our understanding of tectonic hazards and the earthquake cycle. Proper geodetic characterization of slow-slip events is necessary for studies of regional interseismic,... more

CS Recent Improvements to AWP-ODC-GPU supported by Blue Waters PAID Program
Yifeng Cui, Daniel Roten, Peng Wang, Dawei Mu, Carl Pearson, Kyle Withers, William Savran, Kim Olsen, Steven Day, Wen-Mei Hwu
Supported by the NSF’s Petascale Application Improvement Discovery (PAID) program, the SCEC computational team has recently worked with the Improvement Method Enablers (IME) team of UIUC, led by Wen-Mei Hwu, to optimize the nonlinear AWP-ODC-GPU... more

Geology Geology of liquefaction-induced lateral spreading, new results from Christchurch, New Zealand
Gregory De Pascale, Jeffrey Bachhuber, Ellen Rathje, Jing Hu, Peter Almond, Christian Ruegg, Mike Finnemore
Earthquake triggered liquefaction and lateral spreading was widespread in Canterbury, New Zealand during the 2010-2012 Canterbury Earthquake Sequence (CES) and led to ~$20 Billion NZD of damage to infrastructure. Permanent lateral ground... more

Talk 9/14 08:30
GMSV Utilization of earthquake ground motions for nonlinear analysis and design of tall buildings
Gregory Deierlein, Nenad Bijelic, Ting Lin
One of the promising applications of simulated ground motions is in the design of tall buildings and other unique structures, where nonlinear dynamic analyses are used to evaluate their seismic performance. In contrast to current practice, which... more
FARM Geodetic Measurements of Slow Slip and Tremor in Parkfield, CA
Brent Delbridge, Roland Bürgmann, Robert Nadeau
It has been proposed that large bursts of deep tremor ( >20km depth) near Parkfield, CA are associated with quasi-periodic shear dislocations on the deep extent of the San Andreas Fault. Geodetic studies have shown that slow slip accompanies... more

GMP Ground motion amplification in the Kanto Basin from future Itoigawa-Shizuoka earthquakes near Tokyo using virtual earthquakes.
Marine Denolle, Pierre Boué, Naoshi Hirata, Shigeki Nakagawa, Gregory Beroza
The Tokyo Metropolitan area is subject to high seismic risk due to the nearby triple junction and because it is sitting atop the deep Kanto sedimentary basin. In addition, the Itoigawa-Shizuoka Tectonic Line (ISTL) is one of the crustal faults that... more
15036, 16246
Geodesy Surface slip rate of the Imperial Fault estimated from remote controlled quadcopter photogrammetry
John DeSanto, David Sandwell
In recent years, advances in photogrammetry have allowed remote controlled quadcopters to emerge as a useful tool for remote geological surveying. These tools allow pilots to collect photographic data of difficult to reach outcrops and create a... more
Geodesy USGS Southern California GPS Network
Daniel Determan, Aris Aspiotes, Derik Barseghian, Kenneth Hudnut, Keith Stark
The USGS Pasadena field office now operates 140 permanent, continuously-operating Global Positioning System monitoring stations as part of the Southern California GPS Network (SCGN). The SCGN network has grown and modernized significantly over the... more

SDOT Learning viscoelasticity with neural networks
Phoebe DeVries, Thomas Thompson, Brendan Meade
Viscoelastic models have been widely used to explain geodetic observations of the earthquake cycle, time-dependent stress transfer, and delayed earthquake triggering. The calculations involved in these modeling efforts are often computationally... more

Geology Progress towards a comprehensive incremental slip rate and paleo-earthquake age and displacement record for the central Garlock fault
James Dolan, Sally McGill, Ed Rhodes, Thomas Crane
As part of our ongoing studies of the incremental slip-rate and paleo-earthquake age and displacement record of the Garlock fault, we present new slip rate results from our Pilot Knob Valley (PKV) site along the east-central part of the fault. These... more
CS Access to Geodetic Imaging Products through GeoGateway Analysis, Modeling, and Response Tools
Andrea Donnellan, Jay Parker, Robert Granat, Michael Heflin, Marlon Pierce, Jun Wang, John Rundle, Lisa Grant Ludwig
GeoGateway is a web map analysis, modeling, and response tool to allow users to efficiently find and use NASA geodetic imaging data products. GeoGateway tools steer users to relevant products using automated feature extraction, manual search tools,... more

Seismology LArge-n Seismic Survey in Oklahoma (LASSO): Probing injection-induced seismicity with a dense array
Sara Dougherty, Elizabeth Cochran, Rebecca Harrington
In response to the increased seismicity in Oklahoma, we deployed a temporary large-N array of more than 1,800 vertical-component nodal seismometers over a 25-km-by-32-km region (nominal spacing of ~400 m) in northern Oklahoma during spring 2016.... more

SDOT Calculating regional stresses for northern Canterbury: the effect of the 2010 Darfield earthquake
Susan Ellis, Charles Williams, John Ristau, Martin Reyners, Donna Eberhart-Phillips, Laura Wallace
We model regional stresses before and after the Mw 7.1 Darfield earthquake of September 2010 in Canterbury, New Zealand including crustal structure derived from seismic tomography. Models show that the Banks Peninsula volcanic assemblage acts as a... more
SoSAFE Applying newly developed luminescence dating to alluvial fans in the Anza Borrego Desert, southern California
Brittney Emmons, Seulgi Moon, Nathan Brown, Kimberly Blisniuk, Ed Rhodes
Over recent decades, multiple geochronologic tools have been used to date various geomorphic offsets (e.g., alluvial fans, fluvial terraces), enabling long-term slip rate studies of active faults. In this study, we show the robustness of the newly... more

FARM Plasticity Throughout the Earthquake Cycle
Brittany Erickson, Eric Dunham, Jeremy Kozdon
We are developing an earthquake cycle model to simulate multiple ruptures in complex geometries, with material heterogeneity and off-fault plastic response. This initial study focuses on the 2D antiplane shear case of ruptures on strike-slip faults... more

Geodesy Geodetic slip rate estimates in California, and their uncertainties
Eileen Evans
Current understanding of the seismic potential of faults in California is limited in part by our ability to resolve spatial and temporal changes in fault slip rates across the Pacific-North American plate boundary, and quantify their uncertainties.... more

Seismology Differential Waveform Analysis to Test for a Mid-Crustal Low-Velocity Zone Beneath the Western Mojave
William Eymold, Thomas Jordan, David Okaya
Lee et al. (JGR, 2014a) have applied full-3D tomography to a large set of three-component earthquake waveforms and vertical-component ambient-field correlagrams to obtain a revised community velocity model for Southern California, CVM-S4.26. An... more

Seismology Local near-instantaneously dynamically triggered aftershocks of large earthquakes
Wenyuan Fan, Peter Shearer
Aftershocks are often triggered by static- and/or dynamic-stress changes caused by mainshocks. The relative importance of the two triggering mechanisms is controversial at near-to-intermediate distances. We detect and locate 48 previously... more

SDOT Quantifying Late Quaternary deformation in the Santa Maria Basin: A OSL, GPS and soil chronosequence based model for determining strath terrace deformation in the Zaca Creek drainage, Santa Barbara County
Andrew Farris, Nate Onderdonk
The Santa Maria Basin is located on the Central Coast of California and comprises the area bound by the Santa Ynez Fault to the south, and the Little Pine-Foxen Canyon Fault Zone to the north. The Santa Maria Basin is a zone of convergence between... more

Seismology Mento Carlo Inversion of the 1D velocity and anisotropic model in the Juan de Fuca plate
Tian Feng, Thomas Bodin, Lingsen Meng
In this study, we demonstrate the advantage of the Monte Carlo method in solving 1D velocity models. In order to obtain accurate models, both velocity and anisotropy need to be accounted for in the inversion. However, the unknown number of layers of... more

Poster 038
FARM Physical controls of spontaneous and triggered slow-slip and stick-slip at the fault gouge scale
Behrooz Ferdowsi, David Goldsby
Fault slip modes span a continuum of behaviors from tremors and slow slips to earthquakes. Recent laboratory studies reveal that a spectrum of slow-slip responses emerge near the threshold between stable and unstable failure, governed by the complex... more
WGCEP A Spatiotemporal Clustering Model for the Third Uniform California Earthquake Rupture Forecast (UCERF3-ETAS) – Toward an Operational Earthquake Forecast
Edward Field, Kevin Milner, Jeanne Hardebeck, Morgan Page, Nicholas van der Elst, Thomas Jordan, Andrew Michael, Bruce Shaw, Maximilian Werner
We, the ongoing Working Group on California Earthquake Probabilities, present a spatiotemporal clustering model for the third Uniform California Earthquake Rupture Forecast (UCERF3), with the goal being to represent aftershocks, induced seismicity,... more
FARM The mechanics of multifault ruptures and the keystone fault hypothesis
John Fletcher, Michael Oskin, Orlando Teran
Regardless of global tectonic regime, most large earthquakes activate slip on more than one fault. Likewise, the magnitude of an earthquake increases substantially with the number of faults that become activated. Despite the importance of multifault... more
1697, 16190
SoSAFE Sedimentary provenance constraints on the Quaternary faulting history of the Mission Creek fault strand, southern San Andreas Fault Zone, CA
Julie Fosdick, Kimberly Blisniuk, Louis Wersan
Quaternary alluvial fan deposits along the foothills of the San Bernardino Mountains record sediment dispersal from upland catchments across the Mission Creek fault strand of San Andreas fault in the San Gorgonio Pass, CA, and thereby yield key... more
Poster 329
CEO 2016 SCEC Undergraduate Studies in Earthquake Information Technology (UseIT): Earthquake Forecasting Through Physics-Based Simulations
Zhenyu Fu, Morgan Bent, Hernan Lopez, Spencer Ortega, Kevin Scroggins
As part of the 2016 Undergraduate Studies in Earthquake Information Technology (UseIT) internship program, students worked in collaborative groups to tackle unsolved problems in earthquake information technology presented in the form of a Grand... more

USR Structure of the San Andreas Fault Zone in the Salton Trough Region of Southern California: A Comparison with San Andreas Fault Structure in the Loma Prieta Area of Central California
Gary Fuis, Rufus Catchings, Daniel Scheirer, Mark Goldman, Edward Zhang
The San Andreas fault (SAF) in the northern Salton Trough, or Coachella Valley, in southern California, appears non-vertical and non-planar. In cross section, it consists of a steeply dipping segment (75 deg dip NE) from the surface to 6- to 9-km... more

SoSAFE Preliminary late Pleistocene slip rate for the western Pinto Mountain fault, Morongo Valley, southern California
Katherine Gabriel, Doug Yule, Richard Heermance
The northern Coachella Valley region of the San Andreas fault (SAF) system in southern California is complicated by overlapping, active strands and its intersection with prominent, secondary structures such as the Pinto Mountain fault. Recent work... more
Poster 055
FARM Asperity break after 12 years: The Mw6.4 2015 Lefkada (Greece) earthquake
Frantisek Gallovic, Efthimios Sokos, Jiri Zahradnik, Anna Serpetsidaki, Vladislav Plicka, Anastasia Kiratzi
The Mw6.4 earthquake sequence of 2015 in western Greece is analyzed using seismic data. Multiple point source modeling, nonlinear slip patch, and linear slip inversions reveal a coherent rupture image with directivity toward the southwest and... more

Poster 190
Seismology Monitoring of Microseismicity in the Peach Tree Valley Region with Array Techniques
Jose Luis Garcia-Reyes, Robert Clayton
This study is focused on the analysis of microseismicity along the San Andreas Fault in the PeachTree Valley region with the use of array techniques. This zone is located in the transition zone between the locked portion to the south (Parkfield, CA... more

Poster 255
Seismology Aftershock Productivity on Volcanoes: What can it tell us about interpreting aftershocks?
Ricardo Garza-Giron, Emily Brodsky, Stephanie Prejean
Most earthquakes have aftershocks and in some systems, it is thought that the majority of the earthquake rate is comprised of aftershocks. However, volcanic earthquakes are intrinsically different from tectonic ones in that magmatic movement can... more

Talk 9/13 14:30
EFP Blurring the boundary between earthquake forecasting and seismic hazard
Matthew Gerstenberger, David Rhoades, Graeme McVerry, David Harte, Annemarie Christophersen
Earthquake forecasting and seismic hazard have been traditionally considered as independent and separate fields of study. We are currently working on a range of topics that are beginning to blur the bounds between the two fields. With the Canterbury... more

Seismology Strong along-strike variation in aftershock distribution and rupture propagation of 2015 Mw 7.8 Gorkha earthquake in Nepal
Abhijit Ghosh, Bo LI, Manuel Mendoza
Gorkha earthquake presents a unique opportunity to study active tectonics, earthquake dynamics and fault structure in the Himalayas in Nepal. We use four large aperture seismic arrays at teleseismic distances to image the rupture propagation of the... more

CISM Simulation Based Earthquake Forecasting with RSQSim
Jacquelyn Gilchrist, Thomas Jordan, James Dieterich, Keith Richards-Dinger
We are developing a physics-based forecasting model for earthquake ruptures in California. We employ the 3D boundary element code RSQSim to generate synthetic catalogs with millions of events that span up to a million years. The simulations... more

CEO SCEC Web in the Clouds: Motivations and Experiences
David Gill, Philip Maechling, Tran Huynh, John Marquis, John Yu, Edric Pauk, Jason Ballmann, Mark Benthien, Deborah Gormley, Annie Lo
Last year, the SCEC.org website underwent a major overhaul in terms of technology and appearance. We went from a custom PHP solution to an open-source solution based on Drupal 7. Basing the site on Drupal meant that we could use an actively... more

Geodesy Constraining Interacting Fault Models in the Salton Trough with Remote Sensing Data
Margaret Glasscoe, Jay Parker, Andrea Donnellan, Gregory Lyzenga, Chris Milliner
Constraining the distribution of slip and determining the behavior of fault interactions is a complex problem. Field and remotely sensed data often lack the necessary coverage to fully resolve fault behavior. However, realistic physical models may... more

Seismology The 2016 Mw5.1 Fareview, Oklahoma earthquakes: Evidence for long-range poroelastic triggering at >30 km from disposal wells
Thomas Goebel, Matthew Weingarten, Xiaowei Chen, Jackson Haffener, Emily Brodsky
Much of the surge in seismic activity in the central United States has been linked to injection induced pressure changes on pre-stressed faults. This type of pressure-induced seismicity requires a direct hydraulic connection between injection wells... more

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.