Item talk:Q65938: Difference between revisions

{"@context": "https://schema.org", "@type": "CreativeWork", "additionalType": "USGS Numbered Series", "name": "A-priori rupture models for Northern California Type-A faults", "identifier": [{"@type": "PropertyValue", "propertyID": "USGS Publications Warehouse IndexID", "value": "ofr20071437K", "url": "https://pubs.usgs.gov/publication/ofr20071437K"}, {"@type": "PropertyValue", "propertyID": "USGS Publications Warehouse Internal ID", "value": 81124}, {"@type": "PropertyValue", "propertyID": "DOI", "value": "10.3133/ofr20071437K", "url": "https://doi.org/10.3133/ofr20071437K"}], "inLanguage": "en", "isPartOf": [{"@type": "CreativeWorkSeries", "name": "Open-File Report"}], "datePublished": "2008", "dateModified": "2019-07-17", "abstract": "This appendix describes how a-priori rupture models were developed for the northern California Type-A faults. As described in the main body of this report, and in Appendix G, \u201ca-priori\u201d models represent an initial estimate of the rate of single and multi-segment surface ruptures on each fault. Whether or not a given model is moment balanced (i.e., satisfies section slip-rate data) depends on assumptions made regarding the average slip on each segment in each rupture (which in turn depends on the chosen magnitude-area relationship). Therefore, for a given set of assumptions, or branch on the logic tree, the methodology of the present Working Group (WGCEP-2007) is to find a final model that is as close as possible to the a-priori model, in the least squares sense, but that also satisfies slip rate and perhaps other data. This is analogous the WGCEP- 2002 approach of effectively voting on the relative rate of each possible rupture, and then finding the closest moment-balance model (under a more limiting set of assumptions than adopted by the present WGCEP, as described in detail in Appendix G). The 2002 Working Group Report (WCCEP, 2003, referred to here as WGCEP-2002), created segmented earthquake rupture forecast models for all faults in the region, including some that had been designated as Type B faults in the NSHMP, 1996, and one that had not previously been considered. The 2002 National Seismic Hazard Maps used the values from WGCEP-2002 for all the faults in the region, essentially treating all the listed faults as Type A faults. As discussed in Appendix A, the current WGCEP found that there are a number of faults with little or no data on slip-per-event, or dates of previous earthquakes. As a result, the WGCEP recommends that faults with minimal available earthquake recurrence data: the Greenville, Mount Diablo, San Gregorio, Monte Vista-Shannon and Concord-Green Valley be modeled as Type B faults to be consistent with similarly poorly-known faults statewide. As a result, the modified segmented models discussed here only concern the San Andreas, Hayward-Rodgers Creek, and Calaveras faults.", "description": "iii, 7 p.", "publisher": {"@type": "Organization", "name": "U.S. Geological Survey"}, "author": [{"@type": "Person", "name": "Weldon, Ray J. II", "givenName": "Ray J.", "familyName": "Weldon"}, {"@type": "Person", "name": "Wills, Chris J.", "givenName": "Chris J.", "familyName": "Wills"}, {"@type": "Person", "name": "Field, Edward H. field@usgs.gov", "givenName": "Edward H.", "familyName": "Field", "email": "field@usgs.gov", "identifier": {"@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0001-8172-7882", "url": "https://orcid.org/0000-0001-8172-7882"}, "affiliation": [{"@type": "Organization", "name": "Geologic Hazards Science Center", "url": "https://www.usgs.gov/centers/geologic-hazards-science-center"}]}], "funder": [{"@type": "Organization", "name": "Earthquake Hazards Program", "url": "https://www.usgs.gov/programs/earthquake-hazards"}, {"@type": "Organization", "name": "Earthquake Science Center", "url": "https://www.usgs.gov/centers/earthquake-science-center"}, {"@type": "Organization", "name": "Geologic Hazards Science Center", "url": "https://www.usgs.gov/centers/geologic-hazards-science-center"}]}