A5044057381- Seismic Performance and Analysis
- Seismic Waves and Analysis
- Structural Health Monitoring Techniques
- earthquake and tectonic studies
- Seismology and Earthquake Studies
- Landslides and related hazards
- Geotechnical Engineering and Underground Structures
- Seismic Imaging and Inversion Techniques
- Geophysics and Sensor Technology
- Geophysical Methods and Applications
- Disaster Management and Resilience
- Geological Modeling and Analysis
- Railway Engineering and Dynamics
- Anomaly Detection Techniques and Applications
- Public Relations and Crisis Communication
- Gait Recognition and Analysis
- Structural Response to Dynamic Loads
- Nuclear Physics and Applications
- Scientific Computing and Data Management
- Geological and Geochemical Analysis
- Methane Hydrates and Related Phenomena
- Earthquake Detection and Analysis
- High-pressure geophysics and materials
- Transportation Safety and Impact Analysis
- Dynamics and Control of Mechanical Systems
United States Geological Survey
2023-2025
Earthquake Science Center
2024
Southern California Earthquake Center
2015-2023
University of Southern California
2016-2023
University of Nevada, Reno
2023
California Institute of Technology
2023
Pacific Environment
2023
ImageCat (United States)
2022
Southern California University for Professional Studies
2018-2020
Earthquake Engineering Research Institute
2012-2018
Abstract A state‐of‐the‐art seismic performance assessment is illustrated through application to a reinforced‐concrete moment‐frame building designed per current (2003) code provisions. Performance quantified in terms of economic losses and collapse safety. The includes site‐specific hazard analyses, nonlinear dynamic structural response simulations collapse, damage loss estimation. When selecting ground motion records for analyses that are consistent with target level expressed spectral...
Research Article| December 17, 2014 The SCEC Broadband Platform Validation Exercise: Methodology for Code in the Context of Seismic‐Hazard Analyses Christine A. Goulet; Goulet aPacific Earthquake Engineering Center, University California, 325 Davis Hall, Berkeley, California 94720‐1792 U.S.A.goulet@berkeley.edu Search other works by this author on: GSW Google Scholar Norman Abrahamson; Abrahamson bPacific Gas & Electric Company, 245 Market Street, 4th floor, San Francisco, 94105 U.S.A. Paul...
Probabilistic seismic hazard analyses are usually performed with semi-empirical ground motion models (GMMs) following the ergodic assumption whereby average source, path, and site effects from global databases apply for a specific of interest. Site-specific response is likely to differ conditional on parameters used in GMMs (typically V S30 basin depth). Non-ergodic can be evaluated using on-site recordings and/or one-dimensional wave propagation analyses, allows site-to-site variability...
This article documents the earthquake ground motion database developed for NGA-East Project, initiated as part of Next Generation Attenuation (NGA) research program and led by Pacific Earthquake Engineering Research Center (PEER). The project was focused on developing a characterization model (GMC) horizontal motions large region referred to Central Eastern North America (CENA). CENA covers most U.S. Canada, from Rocky Mountains Atlantic Ocean is characterized tectonically stable continental...
The Kiban-Kyoshin network (KiK-net) database is an important resource for ground motion (GM) studies. processing of the KiK-net records a necessary first step to enable their use in engineering applications. In this manuscript we present step-by-step automated protocol used systematically process about 157,000 strong records. includes selection corner frequency high-pass filtering. addition, comprehensive set metadata was compiled each record. As part collection, two algorithms were identify...
In this article, we present an overview of the research project NGA-East, Next Generation Attenuation for Central and Eastern North America (CENA), summarize key methodology products. The was tasked with developing a new ground motion characterization (GMC) model CENA. final NGA-East GMC includes set 17 median models (GMMs) peak acceleration velocity (PGA, PGV) response spectral ordinates periods ranging from 0.01 to 10 s. GMMs are applicable horizontal components motions on very hard rock,...
Abstract This paper provides an overview and introduction to the development of non-ergodic ground-motion models, GMMs. It is intended for a reader who familiar with standard approach developing ergodic starts brief summary GMMs then describes different methods that are used in emphasis on Gaussian process (GP) regression, as currently method preferred by most researchers contributing this special issue. Non-ergodic modeling requires definition locations source site characterizing systematic...
Online Material: Figures showing bias of PSA between data and simulations GMPEs for validation events scenarios. This article summarizes the evaluation ground‐motion simulation methods implemented on Southern California Earthquake Center (SCEC) Broadband Platform (BBP), version 14.3 (as March 2014). A seven‐member panel, authorship this article, was formed to evaluate those prediction pseudospectral accelerations (PSAs) ground motion. The panel’s mandate using tools developed through...
Research Article| September 06, 2017 The SCEC Unified Community Velocity Model Software Framework Patrick Small; Small aDepartment of Computer Science, University Southern California, 3651 Trousdale Parkway, Suite 169, Los Angeles, California 90089‐0742 U.S.A. Search for other works by this author on: GSW Google Scholar David Gill; Gill bSouthern Earthquake Center, U.S.A., maechlin@usc.edu Philip J. Maechling; Maechling maechlin@usc.edueAlso at Building ZHS Room 156, 90089 Ricardo Taborda;...
ABSTRACT We present a nonergodic framework for probabilistic seismic-hazard analysis (PSHA) that is constructed entirely of deterministic, physical models. The use deterministic ground-motion simulations in PSHA calculations not new (e.g., CyberShake), but prior studies relied on kinematic rupture generators to extend empirical earthquake forecasts. Fully dynamic models, which simulate nucleation and propagation static stresses, are still computationally intractable the large simulation...
Abstract Surface rupture from the 2019 Ridgecrest earthquake sequence, initially associated with Mw 6.4 foreshock, occurred on 4 July a ∼17 km long, northeast–southwest-oriented, left-lateral zone of faulting. Following 7.1 mainshock 5 (local time), extensive northwest–southeast-oriented, right-lateral faulting was then also mapped along ∼50 long faults, including subparallel splays in several areas. The largest slip observed epicentral area and crossing dry lakebed China Lake to southeast....
ABSTRACT The 2019 Ridgecrest earthquake sequence produced a 4 July M 6.5 foreshock and 5 7.1 mainshock, along with 23 events magnitudes greater than 4.5 in the 24 hr period following mainshock. epicenters of two principal were located Indian Wells Valley, northwest Searles Valley near towns Ridgecrest, Trona, Argus. We describe observed liquefaction manifestations including sand boils, fissures, lateral spreading features, as well proximate non-ground failure zones that resulted from...
Simulated ground motions have the potential to advance seismic hazard assessments and structural response analyses, particularly for conditions with limited recorded such as large magnitude earthquakes at short source-to-site distances. However, rigorous validation of simulated is needed analysts, practicing engineers, or regulatory bodies be confident in their use. A decade ago, exercises were mainly comparisons simulated-to-observed waveforms median values spectral accelerations selected...
ABSTRACT In this study, we compare the Southern California Earthquake Center CyberShake platform against Next Generation Attenuation-West2 empirical datasets. Because and datasets cover very different magnitude ranges site conditions, develop ground-motion models (GMMs) for to trends with GMMs decompose residuals further analysis. We apply mixed effects regression four in southern, central, northern at 2, 3, 5, 10 s periods, results using same approach. captures total variability of ground...
Abstract We use the deterministic earthquake simulator RSQSim to generate complex sequences of ruptures on fault systems used for hazard assessment. show that source motions combined with a wave propagation code create surface ground fall within range epistemic uncertainties Next Generation Attenuation-West2 set empirical models. model is well calibrated where there are good data constraints, and has correspondence in regions fewer constraints. magnitude, distance, mechanism dependence all...
Abstract Following the Ridgecrest earthquake sequence, consisting of an M 6.4 foreshock and 7.1 mainshock along with many other events, Geotechnical Extreme Events Reconnaissance association deployed a team to gather perishable data. The focused their efforts on documenting ground deformations including surface fault rupture south Naval Air Weapons Station China Lake, liquefaction features in Trona Argus. published report within two weeks mainshock. This article presents data products...
ABSTRACT We developed a 3D elastic wave propagation solver that supports topography using staggered curvilinear grids. Our method achieves comparable accuracy to the classical fourth-order grid velocity–stress finite-difference on Cartesian grid. show is provably stable summation-by-parts operators and weakly imposed boundary conditions via penalty terms. The maximum timestep obeys relationship depends topography-induced stretching along vertical axis. solutions from approach are in...
ABSTRACT Coseismic fault displacements in large earthquakes have caused significant damage to structures and lifelines on near lines. represent a real threat, especially distributed infrastructure systems. For systems that can not avoid active faults, engineering displacement demands are defined using probabilistic fault-displacement hazard analyses (PFDHA). However, PFDHA models sparse poorly constrained partly due the scarcity of detailed observations. Advancements dynamic rupture...
The Statewide (formerly Southern) California Earthquake Center (SCEC) conducts multidisciplinary earthquake system science research that aims to develop predictive models of processes, and produce accurate seismic hazard information can improve societal preparedness resiliency hazards. As part this program, SCEC has developed the CyberShake platform, which calculates physics-based probabilistic analysis (PSHA) for regions with high-quality velocity fault models. platform implements a...
It is common for ground motions to be estimated using a combination of probabilistic and deterministic procedures. Probabilistic seismic hazard analyses (PSHA) are performed estimate intensity measures ( IMs) reference site conditions (usually rock). This followed by modification the rock IMs account effects, typically factors from literature or codes. We demonstrate two California sites three that application nonlinear underestimates evaluated probabilistically return periods engineering...