Propagation of microseisms from the deep ocean to land

Files in This Item:
File Description SizeFormat 
grl52109.pdf1.13 MBAdobe PDFDownload
Title: Propagation of microseisms from the deep ocean to land
Authors: Ying, Yingzi
Bean, Christopher J.
Bromirski, Peter D.
Permanent link: http://hdl.handle.net/10197/6119
Date: 22-Sep-2014
Abstract: 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.
Funding Details: Science Foundation Ireland
Type of material: Journal Article
Publisher: AIP Publishing
Copyright (published version): 2014 American Geophysical Union
Keywords: Computational seismology;Wave propagation;Fluid-solid coupling;Secondary microseism
DOI: 10.1002/2014GL060979
Language: en
Status of Item: Peer reviewed
Appears in Collections:Earth Sciences Research Collection

Show full item record

SCOPUSTM   
Citations 20

10
Last Week
0
Last month
checked on Jun 22, 2018

Google ScholarTM

Check

Altmetric


This item is available under the Attribution-NonCommercial-NoDerivs 3.0 Ireland. No item may be reproduced for commercial purposes. For other possible restrictions on use please refer to the publisher's URL where this is made available, or to notes contained in the item itself. Other terms may apply.