NGA-subduction global ground motion models with regional adjustment factors
We develop semi-empirical ground motion models (GMMs) for peak ground acceleration, peak ground velocity, and 5%-damped pseudo-spectral accelerations for periods from 0.01 to 10 s, for the median orientation-independent horizontal component of subduction earthquake ground motion. The GMMs are applic...
Published in: | Earthquake Spectra |
---|---|
Main Authors: | , , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
SAGE Publications
2021
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1177/87552930211034889 http://journals.sagepub.com/doi/pdf/10.1177/87552930211034889 http://journals.sagepub.com/doi/full-xml/10.1177/87552930211034889 |
id |
crsagepubl:10.1177/87552930211034889 |
---|---|
record_format |
openpolar |
spelling |
crsagepubl:10.1177/87552930211034889 2024-09-15T18:41:30+00:00 NGA-subduction global ground motion models with regional adjustment factors Parker, Grace A Stewart, Jonathan P Boore, David M Atkinson, Gail M Hassani, Behzad U.S. Geological Survey 2021 http://dx.doi.org/10.1177/87552930211034889 http://journals.sagepub.com/doi/pdf/10.1177/87552930211034889 http://journals.sagepub.com/doi/full-xml/10.1177/87552930211034889 en eng SAGE Publications http://www.sagepub.com/licence-information-for-chorus Earthquake Spectra volume 38, issue 1, page 456-493 ISSN 8755-2930 1944-8201 journal-article 2021 crsagepubl https://doi.org/10.1177/87552930211034889 2024-09-03T04:20:15Z We develop semi-empirical ground motion models (GMMs) for peak ground acceleration, peak ground velocity, and 5%-damped pseudo-spectral accelerations for periods from 0.01 to 10 s, for the median orientation-independent horizontal component of subduction earthquake ground motion. The GMMs are applicable to interface and intraslab subduction earthquakes in Japan, Taiwan, Mexico, Central America, South America, Alaska, the Aleutian Islands, and Cascadia. The GMMs are developed using a combination of data inspection, data regression with respect to physics-informed functions, ground-motion simulations, and geometrical constraints for certain model components. The GMMs capture observed differences in source and path effects for interface and intraslab events, conditioned on moment magnitude, rupture distance, and hypocentral depth. Site effect and aleatory variability models are shared between event types. Regionalized GMM components include the model constant (that controls ground motion amplitude), anelastic attenuation, magnitude-scaling break point, linear site response, and sediment depth terms. We develop models for the aleatory between-event variability [Formula: see text], within-event variability [Formula: see text], single-station within-event variability [Formula: see text], and site-to-site variability [Formula: see text]. Ergodic analyses should use the median GMM and aleatory variability computed using the between-event and within-event variability models. An analysis incorporating non-ergodic site response should use the median GMM at the reference shear-wave velocity condition, a site-specific site response model, and aleatory variability computed using the between-event and single-station within-event variability models. Epistemic uncertainty in the median model is represented by standard deviations on the regional model constants, which facilitates scaled-backbone representations of model uncertainty in hazard analyses. Article in Journal/Newspaper Alaska Aleutian Islands SAGE Publications Earthquake Spectra 875529302110348 |
institution |
Open Polar |
collection |
SAGE Publications |
op_collection_id |
crsagepubl |
language |
English |
description |
We develop semi-empirical ground motion models (GMMs) for peak ground acceleration, peak ground velocity, and 5%-damped pseudo-spectral accelerations for periods from 0.01 to 10 s, for the median orientation-independent horizontal component of subduction earthquake ground motion. The GMMs are applicable to interface and intraslab subduction earthquakes in Japan, Taiwan, Mexico, Central America, South America, Alaska, the Aleutian Islands, and Cascadia. The GMMs are developed using a combination of data inspection, data regression with respect to physics-informed functions, ground-motion simulations, and geometrical constraints for certain model components. The GMMs capture observed differences in source and path effects for interface and intraslab events, conditioned on moment magnitude, rupture distance, and hypocentral depth. Site effect and aleatory variability models are shared between event types. Regionalized GMM components include the model constant (that controls ground motion amplitude), anelastic attenuation, magnitude-scaling break point, linear site response, and sediment depth terms. We develop models for the aleatory between-event variability [Formula: see text], within-event variability [Formula: see text], single-station within-event variability [Formula: see text], and site-to-site variability [Formula: see text]. Ergodic analyses should use the median GMM and aleatory variability computed using the between-event and within-event variability models. An analysis incorporating non-ergodic site response should use the median GMM at the reference shear-wave velocity condition, a site-specific site response model, and aleatory variability computed using the between-event and single-station within-event variability models. Epistemic uncertainty in the median model is represented by standard deviations on the regional model constants, which facilitates scaled-backbone representations of model uncertainty in hazard analyses. |
author2 |
U.S. Geological Survey |
format |
Article in Journal/Newspaper |
author |
Parker, Grace A Stewart, Jonathan P Boore, David M Atkinson, Gail M Hassani, Behzad |
spellingShingle |
Parker, Grace A Stewart, Jonathan P Boore, David M Atkinson, Gail M Hassani, Behzad NGA-subduction global ground motion models with regional adjustment factors |
author_facet |
Parker, Grace A Stewart, Jonathan P Boore, David M Atkinson, Gail M Hassani, Behzad |
author_sort |
Parker, Grace A |
title |
NGA-subduction global ground motion models with regional adjustment factors |
title_short |
NGA-subduction global ground motion models with regional adjustment factors |
title_full |
NGA-subduction global ground motion models with regional adjustment factors |
title_fullStr |
NGA-subduction global ground motion models with regional adjustment factors |
title_full_unstemmed |
NGA-subduction global ground motion models with regional adjustment factors |
title_sort |
nga-subduction global ground motion models with regional adjustment factors |
publisher |
SAGE Publications |
publishDate |
2021 |
url |
http://dx.doi.org/10.1177/87552930211034889 http://journals.sagepub.com/doi/pdf/10.1177/87552930211034889 http://journals.sagepub.com/doi/full-xml/10.1177/87552930211034889 |
genre |
Alaska Aleutian Islands |
genre_facet |
Alaska Aleutian Islands |
op_source |
Earthquake Spectra volume 38, issue 1, page 456-493 ISSN 8755-2930 1944-8201 |
op_rights |
http://www.sagepub.com/licence-information-for-chorus |
op_doi |
https://doi.org/10.1177/87552930211034889 |
container_title |
Earthquake Spectra |
container_start_page |
875529302110348 |
_version_ |
1810485913468272640 |