Body-Wave Imaging of Earth’s Mantle Discontinuities from Ambient Seismic Noise
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- P. Poli
- Institut des Sciences de la Terre (ISTerre), Université de Grenoble I, CNRS, BP 53, F-38041 Grenoble Cedex 9, France.
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- M. Campillo
- Institut des Sciences de la Terre (ISTerre), Université de Grenoble I, CNRS, BP 53, F-38041 Grenoble Cedex 9, France.
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- H. Pedersen
- Institut des Sciences de la Terre (ISTerre), Université de Grenoble I, CNRS, BP 53, F-38041 Grenoble Cedex 9, France.
書誌事項
- 公開日
- 2012-11-23
- DOI
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- 10.1126/science.1228194
- 公開者
- American Association for the Advancement of Science (AAAS)
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説明
<jats:title>Exploiting Seismic Noise</jats:title> <jats:p> Typically, seismic imaging has been based on examining the seismic waves that traveled from a known source, usually an earthquake, to a seismograph. <jats:bold> Poli <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="1063" related-article-type="in-this-issue" vol="338" xlink:href="10.1126/science.1228194">1063</jats:related-article> ; see the Perspective by <jats:bold> <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6110" page="1037" related-article-type="in-this-issue" vol="338" xlink:href="10.1126/science.1231290">Prieto</jats:related-article> </jats:bold> ) now show that correlations of body waves in seismic noise can yield information about Earth's deep interior. An array in Finland, supplemented by other stations, was used to examine reflections from two major seismic boundaries within Earth's mantle at depths of about 410 and 660 km thought to be associated with mineralogical changes in Earth's interior. The data imply that the upper discontinuity extends over about 15 kilometers whereas the deeper one is only about 4 km thick. </jats:p>
収録刊行物
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- Science
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Science 338 (6110), 1063-1065, 2012-11-23
American Association for the Advancement of Science (AAAS)
