From Sub-Rayleigh to Supershear Ruptures During Stick-Slip Experiments on Crustal Rocks
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- François X. Passelègue
- Laboratoire de Géologie, CNRS UMR 8538, École Normale Supérieure, 75005 Paris, France.
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- Alexandre Schubnel
- Laboratoire de Géologie, CNRS UMR 8538, École Normale Supérieure, 75005 Paris, France.
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- Stefan Nielsen
- Istituto Nazionale di Geofisica e Vulcanologia, Roma 00143, Italy.
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- Harsha S. Bhat
- Institut de Physique du Globe de Paris, 1 rue Jussieu, 75238 cedex 05 Paris, France.
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- Raùl Madariaga
- Laboratoire de Géologie, CNRS UMR 8538, École Normale Supérieure, 75005 Paris, France.
書誌事項
- 公開日
- 2013-06-07
- DOI
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- 10.1126/science.1235637
- 公開者
- American Association for the Advancement of Science (AAAS)
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説明
<jats:title>Sonic Boom from Below</jats:title> <jats:p> Seismic shear waves released by an earthquake typically far outpace motion along the fault surface. Occasionally, however, earthquakes along strike-slip faults appear to propagate so that the rupture velocity is faster than shear waves, creating a sort of sonic boom along the fault surface. <jats:bold> Passelègue <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6137" page="1208" related-article-type="in-this-issue" vol="340" xlink:href="10.1126/science.1235637">1208</jats:related-article> ) were able to reproduce and measure these so-called supershear ruptures in stick-slip experiments with two pieces of granite under high applied normal stress. Much like during a sonic boom when a plane travels faster than the speed of sound, the ruptures created a shock wave in the form of a Mach cone around the rupture front. </jats:p>
収録刊行物
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- Science
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Science 340 (6137), 1208-1211, 2013-06-07
American Association for the Advancement of Science (AAAS)
