{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1361418520853525504.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1002/2017gl075722"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2017GL075722"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/pdf/10.1002/2017GL075722"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/full-xml/10.1002/2017GL075722"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/am-pdf/10.1002/2017GL075722"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2017GL075722"}}],"dc:title":[{"@value":"Fiber‐Optic Network Observations of Earthquake Wavefields"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>Our understanding of subsurface processes suffers from a profound observation bias: seismometers are sparse and clustered on continents. A new seismic recording approach, distributed acoustic sensing (DAS), transforms telecommunication fiber‐optic cables into sensor arrays enabling meter‐scale recording over tens of kilometers of linear fiber length. We analyze cataloged earthquake observations from three DAS arrays with different horizontal geometries to demonstrate some possibilities using this technology. In Fairbanks, Alaska, we find that stacking ground motion records along 20 m of fiber yield a waveform that shows a high degree of correlation in amplitude and phase with a colocated inertial seismometer record at 0.8–1.6 Hz. Using an L‐shaped DAS array in Northern California, we record the nearly vertically incident arrival of an earthquake from The Geysers Geothermal Field and estimate its backazimuth and slowness via beamforming for different phases of the seismic wavefield. Lastly, we install a fiber in existing telecommunications conduits below Stanford University and show that little cable‐to‐soil coupling is required for teleseismic <jats:italic>P</jats:italic> and <jats:italic>S</jats:italic> phase arrival detection.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381418520853525509","@type":"Researcher","foaf:name":[{"@value":"Nathaniel J. Lindsey"}],"jpcoar:affiliationName":[{"@value":"Earth and Planetary Science Department University of California  Berkeley CA USA"},{"@value":"Energy Geosciences Division Lawrence Berkeley National Laboratory  Berkeley CA USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520853525506","@type":"Researcher","foaf:name":[{"@value":"Eileen R. Martin"}],"jpcoar:affiliationName":[{"@value":"Institute for Computational and Mathematical Engineering Stanford University  Stanford CA USA"},{"@value":"Department of Geophysics Stanford University  Stanford CA USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520853525505","@type":"Researcher","foaf:name":[{"@value":"Douglas S. Dreger"}],"jpcoar:affiliationName":[{"@value":"Earth and Planetary Science Department University of California  Berkeley CA USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520853525377","@type":"Researcher","foaf:name":[{"@value":"Barry Freifeld"}],"jpcoar:affiliationName":[{"@value":"Energy Geosciences Division Lawrence Berkeley National Laboratory  Berkeley CA USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520853525376","@type":"Researcher","foaf:name":[{"@value":"Stephen Cole"}],"jpcoar:affiliationName":[{"@value":"OptaSense, Inc.  Brea CA USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520853525504","@type":"Researcher","foaf:name":[{"@value":"Stephanie R. James"}],"jpcoar:affiliationName":[{"@value":"Department of Geological Sciences University of Florida  Gainesville FL USA"},{"@value":"Sandia National Laboratory  Albuquerque NM USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520853525508","@type":"Researcher","foaf:name":[{"@value":"Biondo L. Biondi"}],"jpcoar:affiliationName":[{"@value":"Institute for Computational and Mathematical Engineering Stanford University  Stanford CA USA"},{"@value":"Department of Geophysics Stanford University  Stanford CA USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520853525507","@type":"Researcher","foaf:name":[{"@value":"Jonathan B. Ajo‐Franklin"}],"jpcoar:affiliationName":[{"@value":"Energy Geosciences Division Lawrence Berkeley National Laboratory  Berkeley CA USA"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00948276"},{"@type":"EISSN","@value":"19448007"}],"prism:publicationName":[{"@value":"Geophysical Research Letters"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2017-12-08","prism:volume":"44","prism:number":"23","prism:startingPage":"11"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#am","http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2017GL075722"},{"@id":"https://onlinelibrary.wiley.com/doi/pdf/10.1002/2017GL075722"},{"@id":"https://onlinelibrary.wiley.com/doi/full-xml/10.1002/2017GL075722"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/am-pdf/10.1002/2017GL075722"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2017GL075722"}],"createdAt":"2017-11-20","modifiedAt":"2023-09-09","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360005669398331136","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Global Observing Needs in the Deep Ocean"}]},{"@id":"https://cir.nii.ac.jp/crid/1360017282189496192","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Extraction of\n                    <i>P</i>\n                    Wave From Ambient Seafloor Noise Observed by Distributed Acoustic Sensing"}]},{"@id":"https://cir.nii.ac.jp/crid/1360021390573508864","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Monitoring volcanic activity with distributed acoustic sensing using the Tongan seafloor telecommunications cable"}]},{"@id":"https://cir.nii.ac.jp/crid/1360302866857736320","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Observation of Shallow Slow Earthquakes by Distributed Acoustic Sensing Using Offshore Fiber‐Optic Cable in the Nankai Trough, Southwest Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360572092505589632","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Detection of hydroacoustic signals on a fiber-optic submarine cable"}]},{"@id":"https://cir.nii.ac.jp/crid/1360584340508749952","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Earthquake Magnitude With DAS: A Transferable Data‐Based Scaling Relation"}]},{"@id":"https://cir.nii.ac.jp/crid/1360584341815344896","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Simultaneous seafloor seismic observation by distributed acoustic sensing and accelerometer using off-Sanriku optical cable observation system"}]},{"@id":"https://cir.nii.ac.jp/crid/1360861707128279552","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Performance of Seismic Observation by Distributed Acoustic Sensing Technology Using a Seafloor Cable Off Sanriku, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1363107370385643264","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Continuous monitoring system for safe managements of CO2 storage and geothermal reservoirs"}]},{"@id":"https://cir.nii.ac.jp/crid/2050025942148533504","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Very broadband strain-rate measurements along a submarine fiber-optic cable off Cape Muroto, Nankai subduction zone, Japan"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1002/2017gl075722"},{"@type":"CROSSREF","@value":"10.3389/fmars.2019.00241_references_DOI_Ye4sxWbOFWhwCnzw0QgZkaqZ1fy"},{"@type":"CROSSREF","@value":"10.1186/s40623-021-01385-5_references_DOI_Ye4sxWbOFWhwCnzw0QgZkaqZ1fy"},{"@type":"CROSSREF","@value":"10.1038/s41598-021-97881-5_references_DOI_Ye4sxWbOFWhwCnzw0QgZkaqZ1fy"},{"@type":"CROSSREF","@value":"10.1029/2022gl098162_references_DOI_Ye4sxWbOFWhwCnzw0QgZkaqZ1fy"},{"@type":"CROSSREF","@value":"10.1186/s40623-024-01972-2_references_DOI_Ye4sxWbOFWhwCnzw0QgZkaqZ1fy"},{"@type":"CROSSREF","@value":"10.1029/2022gl102678_references_DOI_Ye4sxWbOFWhwCnzw0QgZkaqZ1fy"},{"@type":"CROSSREF","@value":"10.1038/s41598-021-82093-8_references_DOI_Ye4sxWbOFWhwCnzw0QgZkaqZ1fy"},{"@type":"CROSSREF","@value":"10.1029/2023gl103045_references_DOI_Ye4sxWbOFWhwCnzw0QgZkaqZ1fy"},{"@type":"CROSSREF","@value":"10.1109/ut49729.2023.10103378_references_DOI_aJ1ETwPCepZRvzb3uC1fHuG3mwH"},{"@type":"CROSSREF","@value":"10.3389/fmars.2022.844506_references_DOI_Ye4sxWbOFWhwCnzw0QgZkaqZ1fy"}]}