Ground-Motion Observations of the 2014 South Napa Earthquake

Baltay, A.; Boatwright, John

doi:10.1785/0220140232

Cited by 30 publications

(31 citation statements)

References 15 publications

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“…The highest PGA (0:995%g) was recorded at Crockett beneath the Carquinez bridge: it is possible that the acceleration recorded there reflects a soil-structure interaction or an unusual path effect. The recorded ground motions for PGA, PGV, and pseudospectral accelerations (PSA) at periods of 0.3, 1.0, and 3.0 s were compared with five ground-motion prediction equations (GMPEs), the four Next Generation Attenuation-West 2 GMPEs and that of Graizer and Kalkan (2015), to analyze both relative source and attenuation properties (see also Baltay and Boatwright, 2015). Overall, the GMPEs matched the median level of ground motion and the general distance decay, as well as the scatter in the data (Fig.…”

Section: Spatial Variability Of Strong-ground Motionsmentioning

confidence: 99%

The Mw 6.0 24 August 2014 South Napa Earthquake

Brocher

Baltay

Hardebeck

et al. 2015

Seismological Research Letters

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Section: Spatial Variability Of Strong-ground Motionsmentioning

confidence: 99%

The Mw 6.0 24 August 2014 South Napa Earthquake

Brocher

Baltay

Hardebeck

et al. 2015

Seismological Research Letters

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“…In my CENA model, I assume frequency-independent anelastic attenuation. Previous experience with active tectonic environments demonstrated that adjusting Q 0 in our GMPE, based on published regional data, produces a better attenuation fit than other attenuation models not having Q 0 as a direct input parameter (Baltay and Boatwright, 2015;Graizer and Kalkan, 2015). I expect that the G-16 model can be adjusted to other stable tectonic regions, for example the Gulf Coast region, using Q 0 values typical for that region.…”

Section: Anelastic Attenuationmentioning

confidence: 93%

Ground‐Motion Prediction Equations for Central and Eastern North America

Graizer

2016

Bulletin of the Seismological Society of America

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A new ground-motion prediction equation (GMPE) model for central and eastern North America (CENA) is presented. The Graizer 2016 (G-16) model is based on the Next Generation Attenuation-East (NGA-East) database for this horizontal peak ground acceleration and 5% damped pseudospectral acceleration RotD50 component (Goulet et al., 2014). The CENA database is not sufficient for creating purely empirical GMPE with recordings covering mostly a range of moment magnitudes M < 6:0 and a limited number of near-fault recordings. The functional forms of the G-16 model are derived from filters representing a particular physical phenomenon affecting the seismic-wave radiation from the source, following the approach developed by Graizer and Kalkan (2007 for active tectonic environment. Main changes in the functional forms for CENA relative to the western United States model (Graizer and Kalkan, 2015) are a shift of maximum frequency of the acceleration response spectrum (RS) toward higher frequencies and an increase in RS amplitudes at high frequencies. The developed site correction is based on multiple runs of representative V S30 profiles through SHAKE-type equivalent-linear codes. Site amplifications are calculated relative to the hard-rock definition used in nuclear industry (V S 2800 m=s). The number of model predictors is limited to a few measurable parameters such as moment magnitude M, closest distance to fault rupture plane R rup , V S30 , and anelastic attenuation factor Q 0 . Incorporating Q 0 as an input parameter allows adjustments based on the regional crustal properties. The model is applicable for the stable continental regions and covers the following range: 4:0 ≤ M ≤ 8:5, 0 ≤ R rup ≤ 1000 km, 450 ≤ V S30 ≤ 2800 m=s, and frequencies 0:1 ≤ f ≤ 100 Hz.

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“…Baltay and Boatwright (2015) compared the ground motion from the earthquake to existing ground-motion prediction equations (GMPEs) in considerable detail, finding that the NGA-West2 GMPEs overestimate the observed ground motions at all frequencies, for distances greater than ~20 km. This indicates that the actual wholepath attenuation is stronger than the models predict, which is not astonishing given that those GMPEs are regressed with one average attenuation function (per frequency) for the entire state of California.…”

Section: Regional Attenuation Parameters In Ground-motion Predictionsmentioning

confidence: 99%

“…Although the GMPEs match the data well at close distances, the observed attenuation is stronger than predicted at distances greater than ~20 kilometers. From figure 2 of Baltay and Boatwright (2015).…”

Section: Regional Attenuation Parameters In Ground-motion Predictionsmentioning

confidence: 99%

“…The August 24, 2014 M6.0 South Napa earthquake was recorded by an extensive network of accelerometers. Baltay and Boatwright (2015) compiled and analyzed strong motion records obtained at 134 stations within 50 kilometers (km) and 292 stations within 100 km of the epicenter. They found that peak ground acceleration (PGA) and velocity (PGV) fall off significantly faster with distance than the NGA-West2 ground motion prediction equations (GMPEs) published in Bozorgnia and others, (2014).…”

Section: Introductionmentioning

confidence: 99%

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Proceedings of the 11th United States-Japan natural resources panel for earthquake research, Napa Valley, California, November 16–18, 2016

Detweiler¹,

Pollitz²

2017

Open-File Report

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For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment-visit https://www.usgs.gov/ or call 1-888-ASK-USGS (1-888-275-8747).For an overview of USGS information products, including maps, imagery, and publications, visit https://store.usgs.gov.Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.The abstracts by non-U.S. Geological Survey (USGS) authors in this volume are published as they were submitted. Abstracts authored entirely by non-USGS authors do not represent the views or position of the USGS or the U.S. Government and are published solely as part of this volume.Suggested citation: Detweiler, S., and Pollitz, F., eds., 2017, Proceedings of the 11th United States-Japan natural resources panel for earthquake research, Napa Valley, California, November 16-18, 2016: U.S. Geological Survey Open-File Report 2017-1133, 147 p., https://doi.org/10.3133/ofr20171133. ISSN 2331ISSN -1258 iii Abstracts of the following presentations were not received for inclusion in this report: Gerald Bawden "NISAR-NASA and ISRO Synthetic Aperture Radar Mission Overview of the mission and science objectives" Gerald Bawden "Development of a GNSS-Enhanced Tsunami Early Warning System" Tom Jordan "CISM earthquake forecasting activities" Ben Brooks "Internet of Things Earthquake Early Warning" Contents Resolution of the Eleventh Joint Meeting of the United States-Japan Panel on Earthquake Research (UJNR), November 2016The UJNR Panel on Earthquake Research promotes advanced research toward a more fundamental understanding of the earthquake process and hazard estimation. The Eleventh Joint meeting was extremely beneficial in furthering cooperation and deepening understanding of problems common to both Japan and the United States.The meeting included productive exchanges of information on approaches to systematic observation and modeling of earthquake processes. Regarding the earthquake and tsunami of March 2011 off the Pacific coast of Tohoku and the 2016 Kumamoto earthquake sequence, the Panel recognizes that further efforts are necessary to achieve our common goal of reducing earthquake risk through close collaboration and focused discussions at the 12th UJNR meeting. We look forward to continued cooperation on issues involving the densification of observation networks and the open exchange of data among scientific communities. We recognize the importance of making information publicly available in a timely manner. We also recognize the importance of information exchange on research policy and strategies, including the frameworks of research organizations. Areas of CooperationSpecific areas of earthquake research where cooperative research b...

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Ground-Motion Observations of the 2014 South Napa Earthquake

Cited by 30 publications

References 15 publications

The Mw 6.0 24 August 2014 South Napa Earthquake

The Mw 6.0 24 August 2014 South Napa Earthquake

Ground‐Motion Prediction Equations for Central and Eastern North America

Proceedings of the 11th United States-Japan natural resources panel for earthquake research, Napa Valley, California, November 16–18, 2016

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