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首页> 外文期刊>Journal of geophysical research. Solid earth: JGR >Seismic velocity changes concentrated at the shallow structure as inferred from correlation analyses of ambient noise during volcano deformation at Izu‐Oshima, Japan
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Seismic velocity changes concentrated at the shallow structure as inferred from correlation analyses of ambient noise during volcano deformation at Izu‐Oshima, Japan

机译：在日本伊豆 - 伊岛，日本火山变形期间，在浅层结构中集中在浅层结构处集中在浅层结构中的变化

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Abstract > We investigate the stress sensitivity of velocity changes at Izu‐Oshima in Japan using seismic interferometry method. We calculate cross correlation functions (CCFs) of ambient noises recorded by four seismic stations on the active volcano from 1 January 2012 to 31 December 2015 at 0.5–1?Hz, 1–2?Hz, and 2–4?Hz. Applying moving time windows to calculate cross spectrum between daily CCFs and reference CCF, which is the average for the all observation period, we compute daily velocity changes. The obtained velocity changes vary from ?1% to 3% with a dominant period of about 1?year. We calculate areal strains by using Global Navigation Satellite Systems data at the volcano. It is evident that the velocity changes are well correlated with the areal strain changes whose linear trend is removed. The stress sensitivity of velocity changes, which are obtained from the observed velocity changes and areal strains, is lower at 0.5–1?Hz than that at higher frequencies: (7.1?±?1.3)?×?10 ?8 ?Pa ?1 at 0.5–1?Hz, (1.4?±?0.1)?×?10 ?7 ?Pa ?1 at 1–2?Hz, and (1.3?±?0.1)?×?10 ?7 ?Pa ?1 at 2–4?Hz. Modeling the velocity changes of Rayleigh wave propagating in layered structures, we find that the observed velocity changes are concentrated in the upper 1?km of the structure. Since similar frequency dependency is recognized among the stress sensitivity of velocity changes reported in previous studies, we conclude that the velocity changes are localized in the shallow depth because of the increase of confining pressure. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“main”> <标题类型=“main”>抽象</ title> >我们使用地震干涉测量方法调查日本Izu-oshima的速度变化的应力敏感性。从2012年1月1日至2015年1月1日至2015年12月31日以0.5-1，1-2？Hz和2-4赫兹，计算由活动火山的四个地震站记录的周围噪音的互相关功能（CCF）。应用移动时间窗口计算每日CCF和参考CCF之间的横梁，这是所有观察期的平均值，我们计算日常速度变化。所获得的速度变化从1％变化到3％，主导时间约为1？一年。我们通过在火山上使用全球导航卫星系统数据来计算面积菌株。显然，速度变化与拆除线性趋势的面值变化很好。从观察到的速度变化和区域菌株获得的速度变化的应力敏感性在0.5-1Ω·赫兹，比在较高频率下：（7.1？±1.3）？×10 ？8 < / sup>？pa ？1 </ sup>在0.5-1≤hz，（1.4？±0.1）？×10 ？7 </ sup>？pa ？1 </ Sup>在1-2？Hz处，（1.3？±0.1）？×10 Δ7α1</ sup>在2-4赫兹。建模瑞利波传播在分层结构中的速度变化，我们发现观察到的速度变化集中在结构的上部1千千米。由于在先前研究中报告的速度变化的应力敏感性之间识别出类似的频率依赖性，我们得出结论，由于限制压力的增加，速度变化是浅层深度的局部化。 </ p> </ abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-34677/'>《Journal of geophysical research. Solid earth: JGR》</a> <b style="margin: 0 2px;">|</b><span>2017年第8期</span><b style="margin: 0 2px;">|</b><span>共16页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Takano Tomoya&option=202" target="_blank" rel="nofollow">Takano Tomoya;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Nishimura Takeshi&option=202" target="_blank" rel="nofollow">Nishimura Takeshi;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Nakahara Hisashi&option=202" target="_blank" rel="nofollow">Nakahara Hisashi;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Department of Geophysics Graduate School of ScienceTohoku UniversitySendai Japan;</p> <p>Department of Geophysics Graduate School of ScienceTohoku UniversitySendai Japan;</p> <p>Department of Geophysics Graduate School of ScienceTohoku UniversitySendai Japan;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/163.html" title="地球物理学">地球物理学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=seismic velocity changes&option=203" rel="nofollow">seismic velocity changes;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=noise correlation&option=203" rel="nofollow">noise correlation;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=volcano deformation&option=203" rel="nofollow">volcano deformation;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=stress sensitivity of velocity changes&option=203" rel="nofollow">stress sensitivity of velocity changes;</a> </p> <div class="translation"> 机译：地震速度变化;噪声相关;火山变形;速度变化的应力敏感性; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704020651672.html">Seismic velocity changes concentrated at the shallow structure as inferred from correlation analyses of ambient noise during volcano deformation at Izu-Oshima, Japan</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Takano Tomoya&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Takano Tomoya,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Nishimura Takeshi&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Nishimura Takeshi,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Nakahara Hisashi&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Nakahara Hisashi </a> <a href="/journal-foreign-34656/" target="_blank" rel="nofollow" class="tuijian_authcolor">Journal of Geophysical Research. 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