Item talk:Q308548
From geokb
{
"USGS Publications Warehouse": { "@context": "https://schema.org", "@type": "Article", "additionalType": "Journal Article", "name": "The Alaska convergent margin backstop splay fault zone, a potential large tsunami generator between the frontal prism and continental framework", "identifier": [ { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse IndexID", "value": "70217722", "url": "https://pubs.usgs.gov/publication/70217722" }, { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse Internal ID", "value": 70217722 }, { "@type": "PropertyValue", "propertyID": "DOI", "value": "10.1029/2019GC008901", "url": "https://doi.org/10.1029/2019GC008901" } ], "journal": { "@type": "Periodical", "name": "Geochemistry, Geophysics, and Geosystems", "volumeNumber": "22", "issueNumber": "1" }, "inLanguage": "en", "isPartOf": [ { "@type": "CreativeWorkSeries", "name": "Geochemistry, Geophysics, and Geosystems" } ], "datePublished": "2021", "dateModified": "2021-02-01", "abstract": "The giant tsunami that swept the Pacific from Alaska to Antarctica in 1946 was generated along one of three Alaska Trench instrumentally recorded aftershock areas following great and giant earthquakes. Aftershock areas were investigated during the past decade with multibeam bathymetry, ocean bottom seismograph wide\u2010angle seismic, reprocessed legacy, and new seismic reflection images. Summarized and updated here are previous papers and additional data. Tectonic structures collocated with aftershock area boundaries indicate possible lengths of rupture in future great earthquakes. NE aftershock area boundaries relate to subducted lower plate structures whereas the SW zone upper plate retains Beringian structural relicts. The lower to middle slope transition separating a stronger continental framework rock from a weaker accreted prism occurs along splay fault zones previously interpreted as backstops in seismic images. Damage zones along splay faults are generally 1\u2010km\u2010wide dipping typically 21\u00b0. Splays form slip paths from the plate interface to the seafloor much shorter than the 3\u20134\u00b0 dipping plate interface beneath the frontal prism. Associated seafloor vent structures indicate overpressured fluids at depth. Splay fault dip and its rigid hanging wall impart greater seafloor uplift than the accreted prism per unit of slip making them effective tsunami generators. Backstop splay fault zones (BSFZs) run along the entire Alaska Trench. Beneath the frontal prism, active bend faults add rugosity to the plate interface and km high relief is commonly imaged in reprocessed legacy and new seismic data. The 1946 Unimak great (M8.6) earthquake epicenter is located near the BSFZ.", "description": "e2019GC008901, 24 p.", "publisher": { "@type": "Organization", "name": "American Geophysical Union" }, "author": [ { "@type": "Person", "name": "von Huene, Roland", "givenName": "Roland", "familyName": "von Huene", "identifier": { "@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0003-1301-3866", "url": "https://orcid.org/0000-0003-1301-3866" }, "affiliation": [ { "@type": "Organization", "name": "USGS, emeritus, 800 Blossom Hill Road, Los Gatos, CA" } ] }, { "@type": "Person", "name": "Miller, John J. jmiller@usgs.gov", "givenName": "John J.", "familyName": "Miller", "email": "jmiller@usgs.gov", "identifier": { "@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0002-9098-0967", "url": "https://orcid.org/0000-0002-9098-0967" }, "affiliation": [ { "@type": "Organization", "name": "Central Energy Resources Science Center", "url": "https://www.usgs.gov/centers/central-energy-resources-science-center" } ] }, { "@type": "Person", "name": "Krabbenhoeft, Anne", "givenName": "Anne", "familyName": "Krabbenhoeft", "affiliation": [ { "@type": "Organization", "name": "GEOMAR Helmholtz Center for Ocean Research Kiel, Wischhofstr. 1-3, 24148 Kiel, Germany" } ] } ], "funder": [ { "@type": "Organization", "name": "Earthquake Science Center", "url": "https://www.usgs.gov/centers/earthquake-science-center" } ], "spatialCoverage": [ { "@type": "Place", "additionalType": "country", "name": "United States", "url": "https://geonames.org/4074035" }, { "@type": "Place", "additionalType": "state", "name": "Alaska" }, { "@type": "Place", "additionalType": "unknown", "name": "Pacific Plate" }, { "@type": "Place", "geo": [ { "@type": "GeoShape", "additionalProperty": { "@type": "PropertyValue", "name": "GeoJSON", "value": { "type": "FeatureCollection", "features": [ { "type": "Feature", "properties": {}, "geometry": { "type": "Polygon", "coordinates": [ [ [ -152.7099609375, 59.17592824927136 ], [ -158.8623046875, 56.04749958329888 ], [ -167.51953124999997, 53.067626642387374 ], [ -165.498046875, 52.53627304145948 ], [ -156.26953125, 55.1286490684888 ], [ -150.7763671875, 58.44773280389084 ], [ -152.7099609375, 59.17592824927136 ] ] ] } } ] } } }, { "@type": "GeoCoordinates", "latitude": 55.66179260052571, "longitude": -158.38378892938013 } ] } ] }
}