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<identifier>oai:HAL:hal-00404493v1</identifier>
<datestamp>2018-01-11</datestamp>
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<title lang=en>Null detection in shear-wave splitting measurements</title>
<creator>Wüstefeld, A.</creator>
<creator>Bokelmann, Goetz</creator>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<source>ISSN: 0037-1106</source>
<source>Bulletin of the Seismological Society of America</source>
<publisher>Seismological Society of America</publisher>
<identifier>hal-00404493</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00404493</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00404493</source>
<source>Bulletin of the Seismological Society of America, Seismological Society of America, 2007, 97 (4), pp.1204-1211. 〈10.1785/0120060190〉</source>
<identifier>DOI : 10.1785/0120060190</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1785/0120060190</relation>
<language>en</language>
<subject>[SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]</subject>
<subject>[PHYS.PHYS.PHYS-GEO-PH] Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph]</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Shear-wave splitting measurements are widely used to analyze orientations of anisotropy. We compare two different shear-wave splitting techniques, which are generally assumed to give similar results. Using a synthetic test, which covers the whole backazimuthal range, we find characteristic differences, however, in fast-axis and delay-time estimates near Null directions between the rotation correlation and the minimum energy method. We show how this difference can be used to identify Null measurements and to determine the quality of the result. This technique is then applied to teleseismic events recorded at station LVZ in northern Scandinavia, for which our method constrains the fast-axis azimuth to be 15° and the delay time 1.1 sec.</description>
<date>2007</date>
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