{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,25]],"date-time":"2026-06-25T12:50:52Z","timestamp":1782391852269,"version":"3.54.5"},"reference-count":21,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2014,8,1]],"date-time":"2014-08-01T00:00:00Z","timestamp":1406851200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2014,8,1]],"date-time":"2014-08-01T00:00:00Z","timestamp":1406851200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"},{"start":{"date-parts":[[2014,8,1]],"date-time":"2014-08-01T00:00:00Z","timestamp":1406851200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"DOI":"10.13039\/100008931","name":"California Earthquake Authority","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100008931","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100004811","name":"California Department of Transportation","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100004811","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Earthquake Spectra"],"published-print":{"date-parts":[[2014,8]]},"abstract":"<jats:p>\n                    We present an update to our 2008\u00a0NGA model for predicting horizontal ground motion amplitudes caused by shallow crustal earthquakes occurring in active tectonic environments. The update is based on analysis of the greatly expanded NGA\u2010West2\u00a0ground motion database and numerical simulations. The updated model contains minor adjustments to our 2008 functional form related to style of faulting effects, hanging wall effects, scaling with the depth to top of rupture, scaling with sediment thickness, and the inclusion of additional terms for the effects of fault dip and rupture directivity. In addition, we incorporate regional differences in far\u2010source distance attenuation and site effects between California and other active tectonic regions. Compared to our 2008\u00a0NGA model, the predicted medians by the updated model are similar for\n                    <jats:bold>M<\/jats:bold>\n                    &gt; 7 and are lower for\n                    <jats:bold>M<\/jats:bold>\n                    &lt; 5. The aleatory variability is larger than that obtained in our 2008\u00a0model.\n                  <\/jats:p>","DOI":"10.1193\/072813eqs219m","type":"journal-article","created":{"date-parts":[[2014,3,14]],"date-time":"2014-03-14T10:37:50Z","timestamp":1394793470000},"page":"1117-1153","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1117,"title":["Update of the Chiou and Youngs NGA Model for the Average Horizontal Component of Peak Ground Motion and Response Spectra"],"prefix":"10.1002","volume":"30","author":[{"given":"Brian S.\u2010J.","family":"Chiou","sequence":"first","affiliation":[{"name":"Division of Research, Innovation, &amp; System Information California Department of Transportation Sacramento CA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert R.","family":"Youngs","sequence":"additional","affiliation":[{"name":"AMEC Environment &amp; Infrastructure, Inc. 180 Grand Ave., Suite 1100 Oakland CA 94612"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2014,8]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1193\/1.2924360"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1785\/gssrl.81.5.794"},{"key":"e_1_2_7_4_1","volume-title":"PEER NGA\u2010West2 Database, PEER Report 2013\/03","author":"Ancheta T. D.","year":"2013"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1785\/0120050228"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1193\/072113EQS209M"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1785\/012003083"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1785\/0120020002"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.1193\/1.2894831"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1193\/1.2894832"},{"key":"e_1_2_7_11_1","volume-title":"NGA Model for the Average Horizontal Component of Peak Ground Motion and Response Spectra, PEER Report 2008\/10","author":"Chiou B. S.\u2010J.","year":"2008"},{"key":"e_1_2_7_12_1","unstructured":"ChiouB. S.\u2010J. andYoungsR. R. 2012.Updating the Chiou and Youngs NGA model: regionalization of anelastic attenuation inProceedings 15th World Conference on Earthquake Engineering Lisbon Portugal."},{"key":"e_1_2_7_13_1","volume-title":"Update of the Chiou and Youngs NGA Ground Motion Model for Average Horizontal Component of Peak Ground Motion and Response Spectra, PEER Report 2013\/07","author":"Chiou B. S.\u2010J.","year":"2013"},{"key":"e_1_2_7_14_1","doi-asserted-by":"publisher","DOI":"10.1193\/1.3479930"},{"key":"e_1_2_7_15_1","first-page":"624","volume-title":"Statistical Models in S","author":"Cleveland W. S.","year":"1993"},{"key":"e_1_2_7_16_1","doi-asserted-by":"publisher","DOI":"10.1193\/071113EQS200M"},{"key":"e_1_2_7_17_1","doi-asserted-by":"publisher","DOI":"10.1193\/1.3650372"},{"key":"e_1_2_7_18_1","volume-title":"R: A language and environment for statistical computing","author":"R Development Core Team","year":"2014"},{"key":"e_1_2_7_19_1","first-page":"129","volume-title":"Final Report of the NGA\u2010West2 Directivity Working Group, PEER Report No. 2013\/09","author":"Spudich P.","year":"2013"},{"key":"e_1_2_7_20_1","doi-asserted-by":"publisher","DOI":"10.1193\/1.2928225"},{"key":"e_1_2_7_21_1","unstructured":"ToroG. R. 1981.Biases in Seismic Ground Motion Prediction Ph.D. Thesis Department of Civil Engineering Massachusetts Institute of Technology 133pp."},{"key":"e_1_2_7_22_1","doi-asserted-by":"publisher","DOI":"10.1193\/071913EQS208M"}],"container-title":["Earthquake Spectra"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1193\/072813EQS219M","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1193\/072813EQS219M","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1193\/072813EQS219M","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,1,25]],"date-time":"2026-01-25T13:46:18Z","timestamp":1769348778000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1193\/072813EQS219M"},"secondary":[{"URL":"https:\/\/pubs.geoscienceworld.org\/earthquake-spectra\/article\/30\/3\/1117\/585871\/update-of-the-chiou-and-youngs-nga-model-for-the","label":"geoscienceworld"}]},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2014,8]]},"references-count":21,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2014,8]]}},"alternative-id":["10.1193\/072813EQS219M"],"URL":"https:\/\/doi.org\/10.1193\/072813eqs219m","archive":["Portico"],"relation":{},"ISSN":["8755-2930","1944-8201"],"issn-type":[{"value":"8755-2930","type":"print"},{"value":"1944-8201","type":"electronic"}],"subject":[],"published":{"date-parts":[[2014,8]]}}}