Enhancing core-diffracted arrivals by supervirtual interferometry

Handle URI:
http://hdl.handle.net/10754/554368
Title:
Enhancing core-diffracted arrivals by supervirtual interferometry
Authors:
Bharadwaj, P.; Nissen-Meyer, T.; Schuster, Gerard T. ( 0000-0001-7532-1587 ) ; Mai, Paul Martin ( 0000-0002-9744-4964 )
Abstract:
A supervirtual interferometry (SVI) method is presented that can enhance the signal-to-noise ratio (SNR) of core diffracted waveforms by as much as O( √ N), where N is the number of inline receivers that record the core-mantle boundary (CMB) diffractions from more than one event. Here, the events are chosen to be approximately inline with the receivers along the same great circle. Results with synthetic and teleseismic data recorded by USArray stations demonstrate that formerly unusable records with low SNR can be transformed to high SNR records with clearly visible CMB diffractions. Another benefit is that SVI allows for the recording of a virtual earthquake at stations not deployed during the time of the earthquake. This means that portable arrays such as USArray can extend the aperture of one recorded earthquake from the West coast to the East coast, even though the teleseism might have only been recorded during theWest coast deployment. In summary, SVI applied to teleseismic data can significantly enlarge the catalogue of usable records both in SNR and available aperture for analysing CMB diffractions. A potential drawback of this method is that it generally provides the correct kinematics of CMB diffractions, but does not necessarily preserve correct amplitude information. © The Authors 2013. Published by Oxford University Press on behalf of The Royal Astronomical Society.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Enhancing core-diffracted arrivals by supervirtual interferometry 2013, 196 (2):1177 Geophysical Journal International
Journal:
Geophysical Journal International
Issue Date:
3-Dec-2013
DOI:
10.1093/gji/ggt452
Type:
Article
ISSN:
0956-540X; 1365-246X
Additional Links:
http://gji.oxfordjournals.org/cgi/doi/10.1093/gji/ggt452
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorBharadwaj, P.en
dc.contributor.authorNissen-Meyer, T.en
dc.contributor.authorSchuster, Gerard T.en
dc.contributor.authorMai, Paul Martinen
dc.date.accessioned2015-05-21T06:58:21Zen
dc.date.available2015-05-21T06:58:21Zen
dc.date.issued2013-12-03en
dc.identifier.citationEnhancing core-diffracted arrivals by supervirtual interferometry 2013, 196 (2):1177 Geophysical Journal Internationalen
dc.identifier.issn0956-540Xen
dc.identifier.issn1365-246Xen
dc.identifier.doi10.1093/gji/ggt452en
dc.identifier.urihttp://hdl.handle.net/10754/554368en
dc.description.abstractA supervirtual interferometry (SVI) method is presented that can enhance the signal-to-noise ratio (SNR) of core diffracted waveforms by as much as O( √ N), where N is the number of inline receivers that record the core-mantle boundary (CMB) diffractions from more than one event. Here, the events are chosen to be approximately inline with the receivers along the same great circle. Results with synthetic and teleseismic data recorded by USArray stations demonstrate that formerly unusable records with low SNR can be transformed to high SNR records with clearly visible CMB diffractions. Another benefit is that SVI allows for the recording of a virtual earthquake at stations not deployed during the time of the earthquake. This means that portable arrays such as USArray can extend the aperture of one recorded earthquake from the West coast to the East coast, even though the teleseism might have only been recorded during theWest coast deployment. In summary, SVI applied to teleseismic data can significantly enlarge the catalogue of usable records both in SNR and available aperture for analysing CMB diffractions. A potential drawback of this method is that it generally provides the correct kinematics of CMB diffractions, but does not necessarily preserve correct amplitude information. © The Authors 2013. Published by Oxford University Press on behalf of The Royal Astronomical Society.en
dc.relation.urlhttp://gji.oxfordjournals.org/cgi/doi/10.1093/gji/ggt452en
dc.rightsArchived with thanks to Geophysical Journal International © The Authors 2013. Published by Oxford University Press on behalf of The Royal Astronomical Society.en
dc.subjectTime-series analysisen
dc.subjectInterferometryen
dc.subjectCore, outer core and inner coreen
dc.subjectBody wavesen
dc.subjectWave scattering and diffractionen
dc.subjectIndian Oceanen
dc.titleEnhancing core-diffracted arrivals by supervirtual interferometryen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalGeophysical Journal Internationalen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionIndian School of Mines, Dhanbad, Indiaen
dc.contributor.institutionETH Zurich, Institute of Geophysics, Switzerlanden
kaust.authorSchuster, Gerard T.en
kaust.authorMai, Paul Martinen
kaust.authorBharadwaj, Pawanen
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