Hide metadata

dc.date.accessioned2015-01-27T15:01:10Z
dc.date.available2015-01-27T15:01:10Z
dc.date.created2008-04-28T13:39:04Z
dc.date.issued2008
dc.identifier.citationBodin, T Maupin, Valerie . Resolution potential of surface wave phase velocity measurements at small arrays. Geophysical Journal International. 2008, 172, 698-706
dc.identifier.urihttp://hdl.handle.net/10852/41944
dc.description.abstractThe deployment of temporary arrays of broadband seismological stations over dedicated targets is common practice. Measurement of surface wave phase velocity across a small array and its depth-inversion gives us information about the structure below the array which is complementary to the information obtained from body-wave analysis. The question is however: what do we actually measure when the array is much smaller than the wave length, and how does the measured phase velocity relates to the real structure below the array? We quantify this relationship by performing a series of numerical simulations of surface wave propagation in 3-D structures and by measuring the apparent phase velocity across the array on the synthetics. A principal conclusion is that heterogeneities located outside the array can map in a complex way onto the phase velocities measured by the array. In order to minimize this effect, it is necessary to have a large number of events and to average measurements from events well-distributed in backazimuth. A second observation is that the period of the wave has a remarkably small influence on the lateral resolution of the measurement, which is dominantly controlled by the size of the array. We analyse if the artefacts created by heterogeneities can be mistaken for azimuthal variations caused by anisotropy. We also show that if the amplitude of the surface waves can be measured precisely enough, phase velocities can be corrected and the artefacts which occur due to reflections and diffractions in 3-D structures greatly reduced. This article has been accepted for publication in Geophysical Journal International © 2007 The Authors Journal compilation © 2007 RAS Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.en_US
dc.languageEN
dc.language.isoenen_US
dc.publisherBlackwell Publishing
dc.titleResolution potential of surface wave phase velocity measurements at small arraysen_US
dc.typeJournal articleen_US
dc.creator.authorBodin, T
dc.creator.authorMaupin, Valerie
cristin.unitcode185,15,22,0
cristin.unitnameInstitutt for geofag
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2
dc.identifier.cristin363096
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Geophysical Journal International&rft.volume=172&rft.spage=698&rft.date=2008
dc.identifier.jtitleGeophysical Journal International
dc.identifier.volume172
dc.identifier.startpage698
dc.identifier.endpage706
dc.identifier.doihttp://dx.doi.org/10.1111/j.1365-246X.2007.03668.x
dc.identifier.urnURN:NBN:no-46336
dc.type.documentTidsskriftartikkelen_US
dc.type.peerreviewedPeer reviewed
dc.source.issn0956-540X
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/41944/2/BodinMaupinGJI08.pdf
dc.type.versionPublishedVersion


Files in this item

Appears in the following Collection

Hide metadata