Ground motions on rocky, cliffed, and sandy shorelines generated by ocean waves

Show simple item record Young, A en Guza, RT en Dickson, Mark en O'Reilly, W en Flick, R en 2015-07-05T23:03:14Z en 2013-12 en
dc.identifier.citation Journal of Geophysical Research: Oceans, 2013, 118 (12), pp. 6590 - 6602 en
dc.identifier.issn 2169-9275 en
dc.identifier.uri en
dc.description.abstract We compare ground motions observed within about 100 m of the waterline on eight sites located on shorelines with different morphologies (rock slope, cliff, and sand beaches). At all sites, local ocean waves generated ground motions in the frequency band 0.01–40 Hz. Between about 0.01 and 0.1 Hz, foreshore loading and gravitational attraction from ocean swell and infragravity waves drive coherent, in-phase ground flexing motions mostly oriented cross-shore that decay inland. At higher frequencies between 0.5 and 40 Hz, breaking ocean waves and wave-rock impacts cause ground shaking. Overall, seismic spectral shapes were generally consistent across shoreline sites and usually within a few orders of magnitude despite the diverse range of settings. However, specific site response varied and was influenced by a combination of tide level, incident wave energy, site morphology, ground composition, and signal decay. Flexing and shaking increased with incident wave energy and was often tidally modulated, consistent with a local generation source. Flexing magnitudes were usually larger than shaking, and flexing displacements of several mm were observed during relatively large incident wave conditions (Hs 4–5 m). Comparison with traffic noise and earthquakes illustrate the relative significance of local ocean-generated signals in coastal seismic data. Seismic observations are not a simple proxy for wave-cliff interaction. en
dc.publisher American Geophysical Union en
dc.relation.ispartofseries Journal of Geophysical Research: Oceans en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from en
dc.rights.uri en
dc.title Ground motions on rocky, cliffed, and sandy shorelines generated by ocean waves en
dc.type Journal Article en
dc.identifier.doi 10.1002/2013JC008883 en
pubs.issue 12 en
pubs.begin-page 6590 en
pubs.volume 118 en
dc.description.version VoR - Version of Record en
dc.rights.holder Copyright: American Geophysical Union en
pubs.end-page 6602 en
dc.rights.accessrights en
pubs.subtype Article en
pubs.elements-id 410489 en Science en School of Environment en
dc.identifier.eissn 2169-9291 en
pubs.record-created-at-source-date 2013-11-25 en

Files in this item

Find Full text

This item appears in the following Collection(s)

Show simple item record


Search ResearchSpace