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dc.contributor.authorBaker, Michael G.  Concept link
dc.contributor.authorAster, Richard C.  Concept link
dc.contributor.authorWiens, Douglas A.  Concept link
dc.contributor.authorNyblade, Andrew A.  Concept link
dc.contributor.authorBromirski, Peter D.  Concept link
dc.contributor.authorGerstoft, Peter  Concept link
dc.contributor.authorStephen, Ralph A.  Concept link
dc.date.accessioned2021-04-07T20:24:08Z
dc.date.available2021-04-07T20:24:08Z
dc.date.issued2020-10-14
dc.identifier.citationBaker, M. G., Aster, R. C., Wiens, D. A., Nyblade, A., Bromirski, P. D., Gerstoft, P., & Stephen, R. A. (2021). Teleseismic earthquake wavefields observed on the Ross Ice Shelf. Journal of Glaciology, 67(261), 58-74.en_US
dc.identifier.urihttps://hdl.handle.net/1912/26919
dc.description© The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Baker, M. G., Aster, R. C., Wiens, D. A., Nyblade, A., Bromirski, P. D., Gerstoft, P., & Stephen, R. A. Teleseismic earthquake wavefields observed on the Ross Ice Shelf. Journal of Glaciology, 67(261), (2021): 58-74, https://doi.org/10.1017/jog.2020.83.en_US
dc.description.abstractObservations of teleseismic earthquakes using broadband seismometers on the Ross Ice Shelf (RIS) must contend with environmental and structural processes that do not exist for land-sited seismometers. Important considerations are: (1) a broadband, multi-mode ambient wavefield excited by ocean gravity wave interactions with the ice shelf; (2) body wave reverberations produced by seismic impedance contrasts at the ice/water and water/seafloor interfaces and (3) decoupling of the solid Earth horizontal wavefield by the sub-shelf water column. We analyze seasonal and geographic variations in signal-to-noise ratios for teleseismic P-wave (0.5–2.0 s), S-wave (10–15 s) and surface wave (13–25 s) arrivals relative to the RIS noise field. We use ice and water layer reverberations generated by teleseismic P-waves to accurately estimate the sub-station thicknesses of these layers. We present observations consistent with the theoretically predicted transition of the water column from compressible to incompressible mechanics, relevant for vertically incident solid Earth waves with periods longer than 3 s. Finally, we observe symmetric-mode Lamb waves generated by teleseismic S-waves incident on the grounding zones. Despite their complexity, we conclude that teleseismic coda can be utilized for passive imaging of sub-shelf Earth structure, although longer deployments relative to conventional land-sited seismometers will be necessary to acquire adequate data.en_US
dc.description.sponsorshipThis research was supported by NSF grants PLR-1142518, 1141916, 1142126, 1246151, 1246416 and OPP-1744852 and 1744856.en_US
dc.publisherCambridge University Pressen_US
dc.relation.urihttps://doi.org/10.1017/jog.2020.83
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectGlacier geophysicsen_US
dc.subjectice shelvesen_US
dc.subjectseismologyen_US
dc.titleTeleseismic earthquake wavefields observed on the ross ice shelfen_US
dc.typeArticleen_US
dc.identifier.doi10.1017/jog.2020.83


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Attribution 4.0 International
Except where otherwise noted, this item's license is described as Attribution 4.0 International