cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17603/ds2-jm19-2w09
title: Compilation and Forecasting of Paleoliquefaction Evidence for the Strength of Ground Motions in the U.S. Pacific Northwest: A Digital Dataset (Version 1)

description: In the U.S. Pacific Northwest (PNW), the historic earthquake record is often insufficient to provide inputs to seismic-hazard analyses (i.e., fault locations and magnitude-frequency relations) or to inform ground-motion predictions for certain seismic sources (e.g., the Cascadia Subduction Zone, CSZ). As a result, analyses of paleoseismic relics are commonly used to infer information about the seismic hazard. However, among the many types of coseismic evidence, soil liquefaction provides the best, if not only, evidence from which the intensities of previous ground motions may be constrained. Accordingly, the overarching goal of this research is to use paleoliquefaction to elucidate previous ground motions in the PNW – both for CSZ events and others – and to further constrain the locations, magnitudes, and recurrence rates of such ruptures. Towards that goal, this data product: (i) compiles all PNW paleoliquefaction evidence from the literature into a GIS package, resulting in data from 185 study sites (e.g., feature locations, types, sizes, and ages); and (iii) develops maps – specific to the CSZ – to guide field explorations for new evidence, such that these efforts are conducted efficiently and strategically. These maps consider both remote-sensing predictions of liquefaction susceptibility and the apparent utility of evidence toward constraint of CSZ ground-motion predictions. Of additional utility, the maps predict liquefaction regionally for various realizations of an M9 CSZ rupture, which may be useful in regional loss estimation, policy development, and science communication. Ultimately, as more paleoliquefaction evidence is identified and studied, better constraint of regional ground-motions in past earthquakes will result.
DOI: 10.17603/ds2-tbeh-8g55
title: The Value of Fieldwork Briefings—CONVERGE Extreme Events Research Check Sheets Series

description: This check sheet defines and describes fieldwork briefings, which provide an opportunity for disaster researchers to share important lessons learned before, during, and after field research. Pre-departure briefings, including establishing and updating research plans and organizing field research logistics, as well as in-field briefings regarding topics such as ethical dilemmas and participant concerns, are discussed in detail. About the CONVERGE Extreme Events Research Check Sheets Series: The National Science Foundation-supported CONVERGE facility at the Natural Hazards Center at the University of Colorado Boulder has developed a series of short, graphical check sheets that are meant to be used as researchers design their studies, prepare to enter the field, conduct field research, and exit the field. The series offers best practices for extreme events research and includes check sheets that are free to the research community. More information is available at: https://converge.colorado.edu/resources/check-sheets.
DOI: 10.17603/ds2-ye2p-8y77
title: Envision: Cartographies of Risk in Lubbock / Visualizar: cartografías del riesgo en Lubbock

description: Envision is part of the outreach and educational strategy of the project titled "Improving Knowledge about NWS Forecaster Core Partner Needs for Reducing Vulnerability to Compound Threats in Landfalling Tropical Cyclones Amid Covid-19" (NOAA grant NA 210AR4590214), led by Jen Henderson (PI), Erik Nielsen (Co-PI), and Rodolfo Hernandez (researcher). 
Envision emerges from the question of how to represent the history of a city through mapping social and environmental risks and hazards. On November 4 and 11, 2022, students of Estacado and Frenship High Schools in Lubbock (TX) participated in the workshop "Envision: Cartographies of Risk in Lubbock" (hereafter, Envision) to solve this challenging question with two different groups during a full-day journey consisting of a morning exploring the city Downtown, historical places, and an air quality lab on campus, followed by an afternoon of social cartography activities with digital and analog maps of the city. This journal is a pedagogical instrument resulting from this project that can be used to inspire other scholars and communities to take their own steps to produce social cartographies to understand social and environmental risks.
DOI: 10.17603/ds27d4g
title: Large-Scale Laboratory Experiments of Wave Impacts on Vertical Cylinders
title: in Large-Scale Laboratory Experiments of Wave Impacts on Vertical Cylinders

description: Large-scale laboratory experiments of wave impacts on vertical cylinders representative of aboveground storage tanks typical of petrochemical facilities located in coastal regions. The objective is to provide a dataset for validation of numerical or analytical models of wave impacts on cylindrical structures. Four types of waves are considered: (i) regular or monochromatic waves; (ii) random or irregular waves; (iii) solitary waves; and (iv) double solitary waves. Three different configurations (models) of the experiment are investigated: (i) a single cylinder; (ii) two cylinders in tandem; and (iii) no cylinder or undisturbed case. Pressure and wave runup are recorded on the cylinders, while wave height and water velocity are recorded around the cylinders.
description: Large-scale experiments at the Oregon State University Hinsdale Wave Research Laboratory to investigate wave impacts on vertical cylinders representative of aboveground storage tanks typical of petrochemical facilities located in coastal regions.
DOI: 10.17603/ds2-28tm-0v86
title: Workshop materials
title: in Aftershock Forecasts User Needs Workshop Materials

description: Three stakeholder workshops were carried out in 2023 to investigate user needs for aftershock forecast products in three countries. Prior to the workshop, non-technical information on aftershock forecasting was provided to the participants and during the workshop, user needs were elicited through several small-group and large-group activities. The design of the workshop as well as details on its implementation and the data collected are presented in a separate manuscript. 

This repository contains the documents needed to reproduce such a workshop, including the pre-workshop steps. It is geared at both modelers and scientists interested in the forecasting of aftershocks (as well as other natural hazards) and communications thereof; as well as (social) scientists interested in the elicitation of user needs for forecasts and other scientific communications.
DOI: 10.17603/ds2-3daf-vk96
title: Undergraduate Research Experience (REU), NHERI 2021: Ground Motion Intensity Estimation Algorithm for Earthquake-Induced Soil Liquefaction Sites

description: This project proposes an algorithm that utilizes data from the Next Generation Liquefaction Database to create geospatial meshes of ground motion intensity, and to determine intensities at sites where earthquake-induced liquefaction has been observed. This project applies a combined modeling and data-driven approach to determine residuals or model deviance from true recorded intensity measure values at recording stations. Going forward, this project serves to provide the geotechnical engineering community with a new technique for more consistent ground motion estimations at liquefaction sites.
DOI: 10.17603/ds2-3qfs-ep96
title: Aeroelastic Testing of a standalone transmission tower with a height of 59.75m - Damaged Case
title: in 186n-Downburst_Transmission_Tower

description: The transmission tower is a steel-lattice-type cat-head overhead tower commonly incorporated in 110 kV, 150 kV, 220 kV, and 500 kV transmission lines. It has a height of 59.75m (196ft) with a square-shaped base of 13m (42.65ft), comprising four legs. These legs are made of steel single-angle members (L5x5x5/16, “L”-shaped cross-section) presented in Zone 1. The outer shape of the tower is pyramidal-shaped up to the bottom of the cat-head top portion, with a slope of 8:1. The tower is designed to carry three parallel conductors in which two conductors are bundled on each cross-arm, and the third conductor is suspended at the mid-point of the top girder through the cat-head window. 
description: Transmission Line Systems (TLSs) play a pivotal role in modern society by serving as the primary infrastructure for delivering electricity from power plants to residential buildings, healthcare facilities, and industrial zones. The extensive network of electricity transmission towers and power lines spans approximately 640,000 miles across the United States, ensuring nationwide electricity distribution. However, the lengthy nature of these systems makes them vulnerable to extreme weather events such as hurricanes, tornadoes, and downbursts. Downbursts are intense, localized columns of rapidly descending cold air originating from thunderstorm clouds generating powerful lateral winds upon reaching the ground that can cause severe structural damage to TLSs. Of many differences between atmospheric boundary layer (ABL) and downburst winds, the highest wind speed in a downburst event occurs 50m to 100 m above the ground surface, intensifying the wind effects on most structures, particularly TLSs. Additionally, the spatiotemporal effect of downbursts tremendously alters the wind loading on lengthy TLSs, potentially leading to structural failures and disruptions in the electricity supply chain.
A grounding step was to design a scaled transmission tower-insulator-conductor system with a geometric scale of  1:50 in the vertical direction and a distorted scale of 1:150 in the horizontal direction. This design was made in three steps: (1) designing and constructing a damaged transmission tower, (2) designing and constructing an undamaged transmission tower, and (3) incorporating the undamaged transmission tower into a TLS comprising three transmission towers. In each step, the model was tested under ABL and downburst winds, except in step (1), where the model was only tested under downburst winds, as shown in Figure 1. We also included two special test cases to heighten the realism level by simulating non-uniform loading and conductor breakage cases. These testing cases were conducted at NSF NHERI Wall of Wind Experimental Facility (WOW EF). 

Awards: Collaborative Research: Downburst Fragility Characterization of Transmission Line Systems Using Experimental and Validated Stochastic Numerical Simulations || CMMI 1762968 & CMMI 1762918
DOI: 10.17603/ds2-3xm5-p759
title: High-Resolution Near-Surface Soil Model Developed for Site Response Analysis in Alameda, CA.

description: This project describes the development of a high-resolution near-surface soil model for the city of Alemda, CA using SCPT data and local geotechnical reports. This study focuses on the city of Alameda to illustrate the benefits of modeling near-surface soil characteristics to obtain high-fidelity site response analyses input parameters and can be used as a framework for using SCPT data and borehole reports to generate a probabilistic sub-surface soil model. This work can benefit the earthquake engineering community, particularly those involved in seismic ground shaking and liquefaction research.
DOI: 10.17603/ds2-9t3a-kz92
title: Site Amplification Factors Developed Using SSHAC Guidance

description: This dataset is associated with a project funded by the Nuclear Regulatory Commission (NRC) to demonstrate the application of the Senior Seismic Hazard Analysis Committee (SSHAC) process to the conduct of site response analysis.  The SSHAC process is used to develop a consistent, scalable framework for the estimation and subsequent propagation of epistemic uncertainty in site amplification that can be incorporated into a probabilistic seismic hazard analysis (PSHA).  The site response analyses were performed for two study sites using the most current methods and models that are consistent with recent state of practice for nuclear facilities and the SSHAC guidance as documented in NUREG–2213 (NRC, 2018).  The two study sites are the Garner Valley downhole array (GVDA) and the Savannah River site (SRS).  The data contained here include some basic input parameters for the site response analyses and the resulting site adjustment factors (SAF) that were utilized in the PSHA.  Details about the full study and how the site amplification was incorporated in the PSHA can be found in Rodriguez-Marek et al. (2021).
DOI: 10.17603/ds2-f69x-hp87
title: Fundamental Properties of Certified NCS in California Hospitals
title: in Fundamental Properties of Floor-Mounted Nonstructural Component in Hospitals

description: This project aggregated fundamental properties of nonstructural components NCs from components tested using the AC156 seismic qualification tests from the California Department of Health Care Access and Information database. Further studies on the relation between different properties may be inferred or specific characteristics of specific classes of NCs can be found. Previously, no other databases for NCs have included the natural frequencies, weights, and dimensions of the NCs. Researchers who are interested in achieving certain statistical measurements for a specific class of equipment may use this dataset.
description: This project aggregated fundamental properties of nonstructural components NCs from components tested using the AC156 seismic qualification tests for the California Department of Health Care Access and Information. Further studies on the relation between different properties may be inferred or specific characteristics of specific classes of NCs can be found. Other databases for NCs have not include the natural frequencies, weights, and dimensions of the NCs previously. Researchers who are interested in achieving certain average statistical measurements for a specific type of equipment. The documented data analysis was supported through the "Hilti Seismic Project (HSP)" supported by Hilti Corporation.
DOI: 10.17603/ds2-yxm7-2p26
title: Microtremor Data Collection in the San Fernando Valley Basin, 2024
title: in Microtremor Measurements Performed in Proximity to Strong Motion Stations Across California

description: The San Fernando Valley Basin (SFVB) is a notable sedimentary basin located in southern California, within the greater Los Angeles region. Situated between the Santa Monica Mountains to the south and the San Gabriel Mountains to the north, the SFVB is part of the Transverse Ranges geologic province. This basin is characterized by relatively flat topography, with an elevation that ranges from sea level to approximately 1,500 feet. The SFVB is seismically active due to its proximity to the San Andreas Fault system and the presence of the Sierra Madre and Santa Susana Faults. As part of ongoing research efforts, 12 microtremor measurements have been conducted throughout the region. These measurements will add to the Shear Wave Velocity Profile Database (VSPDB).
description: This project contains microtremor-based horizontal-to-vertical spectral ratio (mHVSR) data, collected from a series of field surveys conducted at various strong motion stations. The measurements were acquired using 3-component broadband seismometers, with recording durations typically ranging from 30 minutes to 1 hour. mHVSR is a well-established technique for identifying resonant features at sites with substantial impedance contrasts, where the lowest frequency peak in the mHVSR spectrum is often associated with the site’s fundamental frequency. This fundamental frequency is crucial for understanding site-specific seismic behavior and is particularly valuable for seismic hazard assessment and ground motion modeling. The datasets include not only the raw data collected during each survey but also processed outputs such as mean spectral curves, polar curves, Fourier Amplitude Spectra (FAS), and other relevant processing results. These processed data are intended to support further analysis and interpretation, particularly for applications related to site response studies and the characterization of local site conditions. The overall goals of our HVSR research are to develop a publicly accessible database of HVSR data for use in research, to develop effective protocols for analysis and interpretation of HVSR data, and to develop methods for predicting site response conditioned on HVSR data. The database has been established and is available in the United States Community Shear-Wave Velocity (VS) Profile Database (PDB) (https://www.vspdb.org/); the work presented in this doi is contributing to that database. The research presented here was supported by a research gift from the Pacific Gas and Electric (PG&E) Company and University of Southern California. This support is gratefully acknowledged.
DOI: 10.17603/vz3n-5d17
title: DesignSafe-QuakeCoRE Workshop: Using Cyberinfrastructure to Advance Earthquake Resilience

description: This project provides materials from the DesignSafe-QuakeCoRE workshop entitled "Using Cyberinfrastructure to Advance Earthquake Resilience."  This workshop took place in September 2019 at the QuakeCoRE Annual Meeting in Nelson, New Zealand. 
 The available materials include the Workshop Report, which includes a summary of the workshop and results from a pre-workshop survey of participants, as well as the Powerpoint presentations delivered at the workshop and summaries from the break-out group discussions.
DOI: 10.17603/ds2-0kpf-sw07
title: SABv2 Conventional and Subgrid Models
title: in Storm surge predictions from ocean to subgrid scales - Data Repository

description: This project contains the ADCIRC input and output files for the Natural Hazards publication "Storm surge predictions from ocean to subgrid scales". Note, the source files used in this project will work for this project only, and do not reflect the most recent version of the ADCIRC code.
description: This data depot contains input and output files from subgrid and conventional ADCIRC.
DOI: 10.17603/ds2-2y9x-qm74
title: NHERI Debris Impact Experiments Jupyter Notebook

description: Damage caused by tsunamis to coastal communities is often the result of transported debris. Although there have been efforts to characterize these forces from single debris impacts, a more general scenario of multiple debris has not been studied experimentally. To address this need, experimental studies were performed considering the effect of orientation of debris and the number of debris field components on peak impact and damming forces on coastal structures. These forces were evaluated both qualitatively and quantitatively to provide insight into the nature of these impacts. For a few selected cases multiple trials were conducted and an initial statistical study of the debris field collision phenomena was performed. Curated data for this project can be found at (DOI:https://doi.org/10.17603/DS2T09V). This Jupyter Notebook helps visualize and analyze the recorded data. In this context, the notebook presents details on the experimental facility and setup, experimental program and results in terms of raw and filtered data. The user can navigate the notebook, select images and videos and perform filtering for any recorded signal using any selected frequency and range. The lessons from this work provide an initial data-set that can be used to guide further experimental and numerical studies on debris-laden tsunami flows.
DOI: 10.17603/ds2-844j-0r18
title: Using Social Vulnerability Indices in Hazards and Disaster Research—CONVERGE Extreme Events Research Check Sheets Series

description: This check sheet is for those who are considering using social vulnerability indices in hazard and disaster research. Key concepts, considerations, and examples related to the use of social vulnerability indices for research and practical applications are discussed in detail. About the CONVERGE Extreme Events Research Check Sheets Series: The National Science Foundation-supported CONVERGE facility at the Natural Hazards Center at the University of Colorado Boulder has developed a series of short, graphical check sheets that are meant to be used as researchers design their studies, prepare to enter the field, conduct field research, and exit the field. The series offers best practices for extreme events research and includes check sheets that are free to the research community. More information is available at: https://converge.colorado.edu/resources/check-sheets.
DOI: 10.17603/ds2-d0s9-ew95
title: Machine learning based models for estimating seismically induced slope displacement for subduction zone earthquakes

description: Estimating the seismic performance of a slope system in subduction earthquakes zone is crucial in performance-based geotechnical earthquake engineering. This project includes Python scripts and Jupyter notebooks that implement the machine-learning-based slope displacement models developed by Macedo and Liu (2022) for subduction zone earthquakes. The implemented machine learning models include ridge regression, support vector regression, random forest, gradient boosting decision tree, and artificial neural network models. These models take as input the yield coefficient (ky), earthquake magnitude (M), fundamental period (Ts), peak ground velocity (PGV), and spectral acceleration at 1.3Ts (Sa(1.3Ts)) and output the median and standard deviation of the slope displacement. The details on how to use the scripts and files can be found in the readme file.


References: 
Macedo, J. & Liu, C., (2022). Machine learning-based procedures for estimating seismically-induced landslides in subduction tectonic settings. USGS report
DOI: 10.17603/ds2-7gar-ps40
title: Material Characterization of Ultra-High-Performance Concrete (UHPC)
title: in Database for Material Characterization of Ultra-High-Performance Concrete (UHPC)

description: A set of UHPC material tests was performed at the University of Houston Structural Laboratory using cylinder compression tests, direct tensile tests (DTTs), and four-point bending tests. Two UHPC mixes were used: one by Steelike® and one by Tindall Corporation. All UHPC matrices included a 2.0% fiber content by volume with 0.5-in. long high-strength steel fibers produced by HiPer Fiber LLC. 
This test database can support analytical modeling of UHPC materials, statistical analyses, or other UHPC material characterization studies. Funding for the reported tests was received by the ACI Foundation with support by Steelike® and the PCI Daniel P. Jenny Fellowship with support by Tindall Corporation.

A new tension test setup for UHPC and associated test data are also included in this database. The test setup involves large-scale tension rebar-free strip tests (TSTs) that were performed to investigate size effects in the tensile behavior of UHPC and correlate them to the small-scale direct tension tests (DTT) per AASHTO T397 [1]. The intent of TSTs was twofold: (a) compare the large-scale (gage length of 35 in. [890 mm]) tension behavior of UHPC with the small-scale (gage length of 4 in. [101.6 mm]) DTTs, and (b) modify the fixed support conditions of DTTs to pin support conditions in the TSTs to produce a state of pure tension force.
description: A total of 56 UHPC DTTs were performed using the standard specimens in compliance with AASHTO T397. In addition, a total of 50 UHPC tests were performed using simply supported four-point bending (4PB) specimens with the standard dimensions in compliance with ASTM C1609 and ASTM C1856.