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dc.contributor.authorWidiyantoro, S.
dc.contributor.authorKennett, B. L. N.
dc.contributor.authorvan der Hilst, R. D.
dc.contributor.authorvan der Hilst, Robert D.
dc.date.accessioned2016-06-23T15:54:00Z
dc.date.available2016-06-23T15:54:00Z
dc.date.issued2014-06
dc.date.submitted1998-08
dc.identifier.issn1880-5981
dc.identifier.urihttp://hdl.handle.net/1721.1/103293
dc.description.abstractSeismic tomography using S wave travel times faces the difficulty imposed by the interference between S and SKS phases near 83° epicentral distance, as the SKS phase overtakes the S waves in the mantle. If the cross-over is avoided completely by excluding S data beyond 82° then no resolution is available below 2200 km in the lower mantle. A partial solution is to try to pick up the S phase beyond the cross-over which improves coverage and resolution in depth. However, a much larger improvement can be made by following the first arrival with S character and including SKS information with S. Arrival times for both S and SKS phases and the event hypocentres have been taken from the reprocessing of data reported to international agencies. Each event has been relocated, including depth phase information, and later phases re-associated using the improved locations to provide a set of travel times whose variance is significantly reduced compared with the original data catalogues. S travel-time tomography including SKS information out to 105°, provides tomographic images with improved rendition of heterogeneity in the lower mantle. The three-dimensional models of SV wavespeed relative to the ak135 reference velocity model show a significant increase in heterogeneity at the base of the mantle which matches the behaviour seen in results derived from waveform inversion. For most of the mantle there is a considerable similarity between the patterns of heterogeneity in the S wave images and recent P wave tomographic results, but greater differences develop in the lowermost mantle. In the D″ region the SV wavespeed patterns also show some differences from recent SH wavespeed results which mostly correlate with regions of recognised structural complexity.en_US
dc.publisherSpringer Berlin Heidelbergen_US
dc.relation.isversionofhttp://dx.doi.org/10.1186/BF03352194en_US
dc.rightsCreative Commons Attributionen_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.sourceSpringer Berlin Heidelbergen_US
dc.titleExtending shear-wave tomography for the lower mantle using S and SKS arrival-time dataen_US
dc.typeArticleen_US
dc.identifier.citationWidiyantoro, S., B. L. N. Kennett, and R. D. van der Hilst. “Extending Shear-Wave Tomography for the Lower Mantle Using S and SKS Arrival-Time Data.” Earth Planet Sp 50, no. 11–12 (November 1998): 999–1012.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciencesen_US
dc.contributor.mitauthorvan der Hilst, Robert D.en_US
dc.relation.journalEarth, Planets and Spaceen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2016-05-23T09:38:13Z
dc.language.rfc3066en
dc.rights.holderThe Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences.
dspace.orderedauthorsWidiyantoro, S.; Kennett, B. L. N.; van der Hilst, R. D.en_US
dspace.embargo.termsNen_US
dc.identifier.orcidhttps://orcid.org/0000-0003-1650-6818
mit.licensePUBLISHER_CCen_US


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