Modal scattering: a key to understanding oceanic T-waves SCIE SCOPUS
DC Field | Value | Language |
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dc.contributor.author | Park, M | - |
dc.contributor.author | Odom, RI | - |
dc.contributor.author | Soukup, DJ | - |
dc.date.accessioned | 2020-04-21T07:40:40Z | - |
dc.date.available | 2020-04-21T07:40:40Z | - |
dc.date.created | 2020-02-04 | - |
dc.date.issued | 2001-09-01 | - |
dc.identifier.issn | 0094-8276 | - |
dc.identifier.uri | https://sciwatch.kiost.ac.kr/handle/2020.kiost/5854 | - |
dc.description.abstract | The excitation mechanism of oceanic T-waves has been a puzzle for almost fifty years, with refraction from a sloping seafloor and seafloor scattering as two of the most commonly invoked mechanisms. By representing the earthquake source field as a normal mode sum, it can be seen that both mechanisms are very closely related. Strict modal orthogonality prohibits the existence of T-waves in a laterally homogeneous semi-infinite half-space or radially symmetric sphere, as energy cannot be transferred from one mode to another in an homogeneous medium. Deterministic non-planar bathymetry, random boundary roughness, upper crustal heterogeneity, or a combination of these provides a physical mechanism to break the strict orthogonality. We show that modal scattering from the rough seabottom in the epicentral. region converts energy from the directly excited ocean crustal/water column modes to the propagating acoustic modes comprising the oceanic T-wave. Submarine earthquake fault orientation also appears to be reflected in the T-wave excitation. | - |
dc.description.uri | 1 | - |
dc.language | English | - |
dc.publisher | AMER GEOPHYSICAL UNION | - |
dc.title | Modal scattering: a key to understanding oceanic T-waves | - |
dc.type | Article | - |
dc.citation.endPage | 3404 | - |
dc.citation.startPage | 3401 | - |
dc.citation.title | GEOPHYSICAL RESEARCH LETTERS | - |
dc.citation.volume | 28 | - |
dc.citation.number | 17 | - |
dc.contributor.alternativeName | 박민규 | - |
dc.identifier.bibliographicCitation | GEOPHYSICAL RESEARCH LETTERS, v.28, no.17, pp.3401 - 3404 | - |
dc.identifier.doi | 10.1029/2001GL013472 | - |
dc.identifier.wosid | 000170698700048 | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.relation.journalWebOfScienceCategory | Geosciences, Multidisciplinary | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Geology | - |