{"id":5625,"date":"2012-03-11T07:25:50","date_gmt":"2012-03-11T07:25:50","guid":{"rendered":"http:\/\/www.iiees.ac.ir\/fa\/?p=5625"},"modified":"2012-03-11T07:25:50","modified_gmt":"2012-03-11T07:25:50","slug":"2012-03-11-07-36-30","status":"publish","type":"post","link":"http:\/\/old.iiees.ac.ir\/fa\/2012-03-11-07-36-30\/","title":{"rendered":"\u062a\u0639\u06cc\u06cc\u0646 \u0646\u0627\u0647\u0645\u0633\u0627\u0646\u06af\u0631\u062f\u06cc \u0633\u0631\u0639\u062a \u0645\u0648\u062c \u0628\u0631\u0634\u06cc \u062f\u0631 \u067e\u0648\u0633\u062a\u0647 \u0628\u0645  \u0648 \u0627\u0631\u062a\u0628\u0627\u0637 \u0622\u0646 \u0628\u0627 \u062e\u0637\u0648\u0627\u0631\u0647\u200c\u0647\u0627\u06cc \u0633\u0627\u062e\u062a\u0627\u0631\u06cc \u0645\u0646\u0637\u0642\u0647"},"content":{"rendered":"<div dir=\"rtl\" style=\"text-align: center;\"><strong>\u062a\u0639\u06cc\u06cc\u0646 \u0646\u0627\u0647\u0645\u0633\u0627\u0646\u06af\u0631\u062f\u06cc \u0633\u0631\u0639\u062a \u0645\u0648\u062c 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<\/p>\n<p><strong>\u0648\u0627\u0698\u0647<\/strong>\u200c<strong>\u0647\u0627\u06cc \u06a9\u0644\u06cc\u062f\u06cc<\/strong><br \/>\u0646\u0627\u0647\u0645\u0633\u0627\u0646\u06af\u0631\u062f\u06cc\u060c \u062c\u062f\u0627\u06cc\u0634 \u0645\u0648\u062c \u0628\u0631\u0634\u06cc\u060c \u062e\u0637\u0648\u0627\u0631\u0647\u060c \u0628\u0645\u060c \u0634\u0628\u06a9\u0647 \u0644\u0631\u0632\u0647\u200c\u0646\u06af\u0627\u0631\u06cc\u060c \u0645\u0648\u062c \u0628\u0631\u0634\u06cc Sg<\/p>\n<\/p>\n<p>\u200c<\/p>\n<div dir=\"ltr\" style=\"text-align: center;\"><strong>Determination of Shear Wave Anisotropy in the Upper Crust of Bam Area and Its Relation with Regional Lineaments<\/strong><\/div>\n<p dir=\"ltr\" style=\"text-align: center;\">Authors:Gh. Javan, M.Saki, L. Mahshadnia, M. tatar<\/p>\n<\/p>\n<p dir=\"ltr\"><strong>Abstract<\/strong><\/p>\n<p> The seismic anisotropy is a subject of interest for seismologists and geologists. Less well-known information of seismic anisotropy has a key role in geology interpretations. An anisotropic material is one whose properties vary with axis along which they are considered. Seismic anisotropy is a ubiquitous feature of most geological materials. This is because rocks generally exhibit fabric or order, which leads to a directional dependence in seismic velocities. In anisotropic medium, one component of the shear wave travels faster than the orthogonal component. These differences in speed cause the waves to separate. The characterization of anisotropy in the Earth provides a great progress in understanding Earth&#8217;s structures and dynamic evolutions. It is often believed that the vast majority of the crustal anisotropy is caused by cracks and microcracks in the upper 10-15 km of the crust, which produce 0.04 to .25s for anisotropy magnitude. Microcracks in rocks are aligned parallel to the minimum principle stress. The influence of these cracks is in such away, the lower velocities propagate normal to the average crack plane. In this study, we have been investigated the upper crust anisotropy in Bam area by means of shear wave splitting Sg phase. We have selected more than three hundred aftershocks from IIEES local temporary seismic network that had been installed after 2003\/12\/26 Bam earthquake. Our aim in this study is calculating the magnitude (\u03b4t) of anisotropy and direction (\u03c6) of fast wave as main parameters of seismic wave anisotropy in Bam area in south east of Kerman province. For measuring anisotropy parameters, we have used the Teanby et al. (2004) shear wave splitting technique. The results for 15 seismic stations show one main direction for shear wave anisotropy with value of 39 to 79 Degree. The size of anisotropy is about 0.034 to 0.1 sec. This result indicates that the anisotropy belongs to the uppermost crust of Bam area. <\/p>\n<p dir=\"ltr\"><strong>Keywords:<\/strong><\/p>\n<p> Bam, Geology, Local Seismic Net, Seismic wave Anisotropy, Seismology, Shear Wave splitting<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u062a\u0639\u06cc\u06cc\u0646 \u0646\u0627\u0647\u0645\u0633\u0627\u0646\u06af\u0631\u062f\u06cc \u0633\u0631\u0639\u062a \u0645\u0648\u062c \u0628\u0631\u0634\u06cc \u062f\u0631 \u067e\u0648\u0633\u062a\u0647 \u0628\u0645 \u0648 \u0627\u0631\u062a\u0628\u0627\u0637 \u0622\u0646 \u0628\u0627 \u062e\u0637\u0648\u0627\u0631\u0647\u200c\u0647\u0627\u06cc \u0633\u0627\u062e\u062a\u0627\u0631\u06cc \u0645\u0646\u0637\u0642\u0647 \u0645\u062c\u0631\u06cc \u067e\u0631\u0648\u0698\u0647:\u063a\u0644\u0627\u0645 \u062c\u0648\u0627\u0646 \u062f\u0648\u0644\u0648\u0626\u06cc \u0647\u0645\u06a9\u0627\u0631\u0627\u0646:\u0645\u0631\u0648\u0627\u0631\u06cc\u062f \u0633\u0627\u06a9\u06cc \u060c \u0644\u06cc\u0644\u0627 \u0645\u0647\u0634\u0627\u062f\u0646\u06cc\u0627\u060c \u0645\u062d\u0645\u062f \u062a\u0627\u062a\u0627\u0631<span style=\"color:#28B3C7\"> \u0627\u062f\u0627\u0645\u0647 \u2026<\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[40],"tags":[],"class_list":["post-5625","post","type-post","status-publish","format-standard","hentry","category-2008-06-21-08-21-37"],"_links":{"self":[{"href":"http:\/\/old.iiees.ac.ir\/fa\/wp-json\/wp\/v2\/posts\/5625","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/old.iiees.ac.ir\/fa\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/old.iiees.ac.ir\/fa\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/old.iiees.ac.ir\/fa\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/old.iiees.ac.ir\/fa\/wp-json\/wp\/v2\/comments?post=5625"}],"version-history":[{"count":0,"href":"http:\/\/old.iiees.ac.ir\/fa\/wp-json\/wp\/v2\/posts\/5625\/revisions"}],"wp:attachment":[{"href":"http:\/\/old.iiees.ac.ir\/fa\/wp-json\/wp\/v2\/media?parent=5625"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/old.iiees.ac.ir\/fa\/wp-json\/wp\/v2\/categories?post=5625"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/old.iiees.ac.ir\/fa\/wp-json\/wp\/v2\/tags?post=5625"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}