Dominant seismic noise sources in the Southern Ocean and West Pacific, 2000-2012, recorded at the Warramunga Seismic Array, Australia
Seismic noise is important in determining Earth structure and also provides an insight into ocean wave patterns and long-term trends in storm activity and global climate. We present a long-duration study of seismic noise focused on the Southern Ocean using recordings from the Warramunga Seismic Arra...
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American Geophysical Union
2015
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Online Access: | http://hdl.handle.net/1885/70738 |
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ftanucanberra:oai:digitalcollections.anu.edu.au:1885/70738 2023-05-15T18:24:24+02:00 Dominant seismic noise sources in the Southern Ocean and West Pacific, 2000-2012, recorded at the Warramunga Seismic Array, Australia Reading, Anya M Koper, Keith Gal, Martin Graham, Leon Tkalcic, Hrvoje Hemer, Mark 2015-12-13T22:16:11Z http://hdl.handle.net/1885/70738 unknown American Geophysical Union 0094-8276 http://hdl.handle.net/1885/70738 Geophysical Research Letters Journal article 2015 ftanucanberra 2015-12-28T23:35:00Z Seismic noise is important in determining Earth structure and also provides an insight into ocean wave patterns and long-term trends in storm activity and global climate. We present a long-duration study of seismic noise focused on the Southern Ocean using recordings from the Warramunga Seismic Array, Northern Territory, Australia. Using high-resolution analysis, we determine the seismic slowness and back azimuth of observed seismic noise, microseisms, at hourly intervals through over a decade (2000-2012). We identify three dominant sources of body wave (P) noise in the Southern Ocean which we interpret to originate from a South Atlantic source propagating as PP waves, and Kerguelen Island and Philippine Sea sources propagating as P waves. We also identify surface waves from around the Australian coast. All sources show distinct seasonality and a low, but discernable, interannual variability. Article in Journal/Newspaper Southern Ocean Australian National University: ANU Digital Collections Kerguelen Kerguelen Island ENVELOPE(69.500,69.500,-49.250,-49.250) Pacific Southern Ocean |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
description |
Seismic noise is important in determining Earth structure and also provides an insight into ocean wave patterns and long-term trends in storm activity and global climate. We present a long-duration study of seismic noise focused on the Southern Ocean using recordings from the Warramunga Seismic Array, Northern Territory, Australia. Using high-resolution analysis, we determine the seismic slowness and back azimuth of observed seismic noise, microseisms, at hourly intervals through over a decade (2000-2012). We identify three dominant sources of body wave (P) noise in the Southern Ocean which we interpret to originate from a South Atlantic source propagating as PP waves, and Kerguelen Island and Philippine Sea sources propagating as P waves. We also identify surface waves from around the Australian coast. All sources show distinct seasonality and a low, but discernable, interannual variability. |
format |
Article in Journal/Newspaper |
author |
Reading, Anya M Koper, Keith Gal, Martin Graham, Leon Tkalcic, Hrvoje Hemer, Mark |
spellingShingle |
Reading, Anya M Koper, Keith Gal, Martin Graham, Leon Tkalcic, Hrvoje Hemer, Mark Dominant seismic noise sources in the Southern Ocean and West Pacific, 2000-2012, recorded at the Warramunga Seismic Array, Australia |
author_facet |
Reading, Anya M Koper, Keith Gal, Martin Graham, Leon Tkalcic, Hrvoje Hemer, Mark |
author_sort |
Reading, Anya M |
title |
Dominant seismic noise sources in the Southern Ocean and West Pacific, 2000-2012, recorded at the Warramunga Seismic Array, Australia |
title_short |
Dominant seismic noise sources in the Southern Ocean and West Pacific, 2000-2012, recorded at the Warramunga Seismic Array, Australia |
title_full |
Dominant seismic noise sources in the Southern Ocean and West Pacific, 2000-2012, recorded at the Warramunga Seismic Array, Australia |
title_fullStr |
Dominant seismic noise sources in the Southern Ocean and West Pacific, 2000-2012, recorded at the Warramunga Seismic Array, Australia |
title_full_unstemmed |
Dominant seismic noise sources in the Southern Ocean and West Pacific, 2000-2012, recorded at the Warramunga Seismic Array, Australia |
title_sort |
dominant seismic noise sources in the southern ocean and west pacific, 2000-2012, recorded at the warramunga seismic array, australia |
publisher |
American Geophysical Union |
publishDate |
2015 |
url |
http://hdl.handle.net/1885/70738 |
long_lat |
ENVELOPE(69.500,69.500,-49.250,-49.250) |
geographic |
Kerguelen Kerguelen Island Pacific Southern Ocean |
geographic_facet |
Kerguelen Kerguelen Island Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Geophysical Research Letters |
op_relation |
0094-8276 http://hdl.handle.net/1885/70738 |
_version_ |
1766204892674785280 |