Propagation of microseisms from the deep ocean to land
Ocean-generated microseisms are faint Earth vibrations that result from pressure fluctuations at the sea floor generated by the interaction between ocean surface gravity waves, and are continuously recorded as low frequency seismic noise. Here we investigate microseism propagation away from deep-oce...
Published in: | Geophysical Research Letters |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
AIP Publishing
2014
|
Subjects: | |
Online Access: | http://hdl.handle.net/10197/6119 https://doi.org/10.1002/2014GL060979 |
id |
ftunivcolldublin:oai:researchrepository.ucd.ie:10197/6119 |
---|---|
record_format |
openpolar |
spelling |
ftunivcolldublin:oai:researchrepository.ucd.ie:10197/6119 2023-05-15T17:41:25+02:00 Propagation of microseisms from the deep ocean to land Ying, Yingzi Bean, Christopher J. Bromirski, Peter D. 2014-11-07T09:51:23Z http://hdl.handle.net/10197/6119 https://doi.org/10.1002/2014GL060979 en eng AIP Publishing Geophysical Research Letters http://hdl.handle.net/10197/6119 41 18 6374 6379 doi:10.1002/2014GL060979 This is the author's version of the following article: Yingzi Ying, Christopher J. Bean, and Peter D. Bromirski (2014) "Propagation of microseisms from the deep ocean to land" Geophysical Research Letters, 41(18) : 6374-6379 which has been published in final form at http://dx.doi.org/10.1002/2014GL060979 Computational seismology Wave propagation Fluid-solid coupling Secondary microseism Journal Article 2014 ftunivcolldublin https://doi.org/10.1002/2014GL060979 2022-04-08T14:18:31Z Ocean-generated microseisms are faint Earth vibrations that result from pressure fluctuations at the sea floor generated by the interaction between ocean surface gravity waves, and are continuously recorded as low frequency seismic noise. Here we investigate microseism propagation away from deep-ocean source regions using the spectral element method for an oceanic model that contains realistic northeast Atlantic Ocean irregular-layered structure composed of water, sediment, and upper crust. It also includes structural heterogeneities and continental slope and shelf bathymetry. Numerical simulations of coupled acoustic and elastic wave propagation in both simplified models and the full realistic model show that most microseism energy is confined to sediment and water column waveguides. We also show that a significant portion of microseism energy is reflected back to the deep ocean by the continental slope, while only a small fraction of deep-ocean-generated microseism energy reaches land. We conclude that terrestrially observed microseisms are largely generated in shallow water on continental shelves. Science Foundation Ireland European Union Marie Curie Programme Article in Journal/Newspaper Northeast Atlantic University College Dublin: Research Repository UCD Geophysical Research Letters 41 18 6374 6379 |
institution |
Open Polar |
collection |
University College Dublin: Research Repository UCD |
op_collection_id |
ftunivcolldublin |
language |
English |
topic |
Computational seismology Wave propagation Fluid-solid coupling Secondary microseism |
spellingShingle |
Computational seismology Wave propagation Fluid-solid coupling Secondary microseism Ying, Yingzi Bean, Christopher J. Bromirski, Peter D. Propagation of microseisms from the deep ocean to land |
topic_facet |
Computational seismology Wave propagation Fluid-solid coupling Secondary microseism |
description |
Ocean-generated microseisms are faint Earth vibrations that result from pressure fluctuations at the sea floor generated by the interaction between ocean surface gravity waves, and are continuously recorded as low frequency seismic noise. Here we investigate microseism propagation away from deep-ocean source regions using the spectral element method for an oceanic model that contains realistic northeast Atlantic Ocean irregular-layered structure composed of water, sediment, and upper crust. It also includes structural heterogeneities and continental slope and shelf bathymetry. Numerical simulations of coupled acoustic and elastic wave propagation in both simplified models and the full realistic model show that most microseism energy is confined to sediment and water column waveguides. We also show that a significant portion of microseism energy is reflected back to the deep ocean by the continental slope, while only a small fraction of deep-ocean-generated microseism energy reaches land. We conclude that terrestrially observed microseisms are largely generated in shallow water on continental shelves. Science Foundation Ireland European Union Marie Curie Programme |
format |
Article in Journal/Newspaper |
author |
Ying, Yingzi Bean, Christopher J. Bromirski, Peter D. |
author_facet |
Ying, Yingzi Bean, Christopher J. Bromirski, Peter D. |
author_sort |
Ying, Yingzi |
title |
Propagation of microseisms from the deep ocean to land |
title_short |
Propagation of microseisms from the deep ocean to land |
title_full |
Propagation of microseisms from the deep ocean to land |
title_fullStr |
Propagation of microseisms from the deep ocean to land |
title_full_unstemmed |
Propagation of microseisms from the deep ocean to land |
title_sort |
propagation of microseisms from the deep ocean to land |
publisher |
AIP Publishing |
publishDate |
2014 |
url |
http://hdl.handle.net/10197/6119 https://doi.org/10.1002/2014GL060979 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
Geophysical Research Letters http://hdl.handle.net/10197/6119 41 18 6374 6379 doi:10.1002/2014GL060979 |
op_rights |
This is the author's version of the following article: Yingzi Ying, Christopher J. Bean, and Peter D. Bromirski (2014) "Propagation of microseisms from the deep ocean to land" Geophysical Research Letters, 41(18) : 6374-6379 which has been published in final form at http://dx.doi.org/10.1002/2014GL060979 |
op_doi |
https://doi.org/10.1002/2014GL060979 |
container_title |
Geophysical Research Letters |
container_volume |
41 |
container_issue |
18 |
container_start_page |
6374 |
op_container_end_page |
6379 |
_version_ |
1766142972287516672 |