{"@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/1361418521526129792.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1002/2016jb013001"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2016JB013001"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2016JB013001"}}],"dc:title":[{"@value":"Alternative source models of very low frequency events"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>We present alternative source models for very low frequency (VLF) events, previously inferred to be radiation from individual slow earthquakes that partly fill the period range between slow slip events lasting thousands of seconds and low‐frequency earthquakes (LFE) with durations of tenths of a second. We show that VLF events may emerge from bandpass filtering a sum of clustered, shorter duration, LFE signals, believed to be the components of tectonic tremor. Most published studies show VLF events occurring concurrently with tremor bursts and LFE signals. Our analysis of continuous data from Costa Rica detected VLF events only when tremor was also occurring, which was only 7% of the total time examined. Using analytic and synthetic models, we show that a cluster of LFE signals produces the distinguishing characteristics of VLF events, which may be determined by the cluster envelope. The envelope may be diagnostic of a single, dynamic, slowly slipping event that propagates coherently over kilometers or represents a narrowly band‐passed version of nearly simultaneous arrivals of radiation from slip on multiple higher stress drop and/or faster propagating slip patches with dimensions of tens of meters (i.e., LFE sources). Temporally clustered LFE sources may be triggered by single or multiple distinct aseismic slip events or represent the nearly simultaneous chance occurrence of background LFEs. Given the nonuniqueness in possible source durations, we suggest it is premature to draw conclusions about VLF event sources or how they scale.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380294643696239494","@type":"Researcher","foaf:name":[{"@value":"J. Gomberg"}],"jpcoar:affiliationName":[{"@value":"U.S. Geological Survey University of Washington  Seattle Washington USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418521526129794","@type":"Researcher","foaf:name":[{"@value":"D. C. Agnew"}],"jpcoar:affiliationName":[{"@value":"Institute of Geophysics and Planetary Physics University of California, San Diego  La Jolla California USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418521526129792","@type":"Researcher","foaf:name":[{"@value":"S. Y. Schwartz"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Sciences University of California  Santa Cruz California USA"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"21699313"},{"@type":"EISSN","@value":"21699356"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Solid Earth"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2016-09","prism:volume":"121","prism:number":"9","prism:startingPage":"6722","prism:endingPage":"6740"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2016JB013001"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2016JB013001"}],"createdAt":"2016-09-05","modifiedAt":"2023-09-09","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360004229808521216","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Resolving the Detailed Spatiotemporal Slip Evolution of Deep Tremor in Western Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004232523514496","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Strain rate effect on fault slip and rupture evolution: Insight from meter-scale rock friction experiments"}]},{"@id":"https://cir.nii.ac.jp/crid/1360021390743241472","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"A Single‐Station Method for Seismic Detection of Slow Earthquakes: Applications to Japan and the Mexican Subduction Zone"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285708268797696","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Tidal Modulation and Tectonic Implications of Tremors in Taiwan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360565164305327744","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Seismic Moment, Seismic Energy, and Source Duration of Slow Earthquakes: Application of Brownian slow earthquake model to three major subduction zones"}]},{"@id":"https://cir.nii.ac.jp/crid/1360846641753424128","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Shallow very-low-frequency earthquakes accompany slow slip events in the Nankai subduction zone"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848656073954560","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Two-Dimensional Probabilistic Cell Automaton Model for Broadband Slow Earthquakes"}]},{"@id":"https://cir.nii.ac.jp/crid/1361975843010344832","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Detection of Low‐Frequency Earthquakes in Broadband Random Time Sequences: Are They Independent Events?"}]},{"@id":"https://cir.nii.ac.jp/crid/1390564238108729600","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Probing Earthquake Physics Using Multidisciplinary Approaches"},{"@language":"ja","@value":"分野横断的なアプローチを用いた地震の物理の研究"},{"@language":"ja-Kana","@value":"ブンヤ オウダンテキ ナ アプローチ オ モチイタ ジシン ノ ブツリ ノ ケンキュウ"}]},{"@id":"https://cir.nii.ac.jp/crid/2050025942143152000","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Bridging the gap between low-frequency and very-low-frequency earthquakes"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1002/2016jb013001"},{"@type":"CROSSREF","@value":"10.1029/2023jb027311_references_DOI_1pSI90LMpcWBDrzuzeLf2zkPjfK"},{"@type":"CROSSREF","@value":"10.1186/s40623-020-01172-8_references_DOI_1pSI90LMpcWBDrzuzeLf2zkPjfK"},{"@type":"CROSSREF","@value":"10.1002/2017jb014494_references_DOI_1pSI90LMpcWBDrzuzeLf2zkPjfK"},{"@type":"CROSSREF","@value":"10.1002/2018gl077461_references_DOI_1pSI90LMpcWBDrzuzeLf2zkPjfK"},{"@type":"CROSSREF","@value":"10.1038/s41467-018-03431-5_references_DOI_1pSI90LMpcWBDrzuzeLf2zkPjfK"},{"@type":"CROSSREF","@value":"10.1007/s00024-018-1976-9_references_DOI_1pSI90LMpcWBDrzuzeLf2zkPjfK"},{"@type":"CROSSREF","@value":"10.1016/j.tecto.2017.11.039_references_DOI_1pSI90LMpcWBDrzuzeLf2zkPjfK"},{"@type":"CROSSREF","@value":"10.1029/2018jb015663_references_DOI_1pSI90LMpcWBDrzuzeLf2zkPjfK"},{"@type":"CROSSREF","@value":"10.4294/zisin.2018-12_references_DOI_1pSI90LMpcWBDrzuzeLf2zkPjfK"},{"@type":"CROSSREF","@value":"10.1029/2019jb017643_references_DOI_1pSI90LMpcWBDrzuzeLf2zkPjfK"}]}