Estimation of Seismic Centroid Moment Tensor Using Ocean Bottom Pressure Gauges as Seismometers

Kubota Tatsuya; Saito Tatsuhiko; Suzuki Wataru; Hino Ryota

摘要

Abstract > We examined the dynamic pressure change at the seafloor to estimate the centroid moment tensor solutions of the largest and second largest foreshocks ( <fi> M <sub>w</sub> </fi> 7.2 and 6.5) of the 2011 Tohoku‐Oki earthquake. Combination of onshore broadband seismograms and high‐frequency (~20–200?s) seafloor pressure records provided the resolution of the horizontal locations of the centroids, consistent with the results of tsunami inversion using the long‐period (?10?min) seafloor pressure records although the depth was not constrained well, whereas the source locations were poorly constrained by the onshore seismic data alone. Also, the waveforms synthesized from the estimated CMT solution demonstrated the validity of the theoretical relationship between pressure change and vertical acceleration at the seafloor. The results of this study suggest that offshore pressure records can be utilized as offshore seismograms, which would be greatly useful for revealing the source process of offshore earthquakes. </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”XML：Lang =“en”> <标题类型=“main”>抽象</ title> >我们检查了海底的动态压力变化来估计最大的质心张量解决方案和2011年Tohoku-oki地震的第二大的前座（<fi> m <sub> w </ sub> </ fi> 7.2和6.5）。陆上宽带地震图的组合和高频（〜20-200？S）海底压力记录提供了质心的水平位置的分辨率，与使用长期（？10？min）海底的海啸反演的结果一致压力记录虽然深度不受约束良好，而单独的陆上地震数据源地点受到严重限制。而且，从估计的CMT解决方案中合成的波形证明了海底压力变化与垂直加速度之间的理论关系的有效性。本研究的结果表明，海上压力记录可用作海上地震图，这对于揭示海上地震的源过程将极大的用途。 </ 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-23539/'>《Geophysical Research Letters》</a> <b style="margin: 0 2px;">|</b><span>2017年第21期</span><b style="margin: 0 2px;">|</b><span>共9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=Kubota Tatsuya&option=202" target="_blank" rel="nofollow">Kubota Tatsuya;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Saito Tatsuhiko&option=202" target="_blank" rel="nofollow">Saito Tatsuhiko;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Suzuki Wataru&option=202" target="_blank" rel="nofollow">Suzuki Wataru;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Hino Ryota&option=202" target="_blank" rel="nofollow">Hino Ryota;</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>National Research Institute for Earth Science and Disaster ResilienceTsukuba Japan;</p> <p>National Research Institute for Earth Science and Disaster ResilienceTsukuba Japan;</p> <p>National Research Institute for Earth Science and Disaster ResilienceTsukuba Japan;</p> <p>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=ocean bottom pressure gauge&option=203" rel="nofollow">ocean bottom pressure gauge;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=dynamic pressure change&option=203" rel="nofollow">dynamic pressure change;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=CMT analysis&option=203" rel="nofollow">CMT analysis;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=seismometer&option=203" rel="nofollow">seismometer;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=offshore interplate earthquake&option=203" rel="nofollow">offshore interplate earthquake;</a> </p> <div class="translation"> 机译：海底压力表;动态压力变化;CMT分析;地震表;海上互连地震; 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class="enjiyixqcontent" href="/academic-conference-cn_meeting-3927_thesis/02022912495.html">布设近海海底地震仪对沿海地震定位精度的提升作用——以南澳外海域ML2.8地震为例</a> <b>[C]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=谢小玲&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 谢小玲</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=孙金龙&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,孙金龙</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=康英&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,康英</a> <span> <a href="/conference-cn-3927/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 2014年中国地球科学联合学术年会 </a> <span> <span> . 2014</span> </span> </div> </li> <li> <div> <b>7. </b><a class="enjiyixqcontent" href="/academic-degree-domestic_mphd_thesis/02031122676.html">新疆伽师地区中小地震矩张量反演应用研究</a> <b>[A] </b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=屠泓为&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 屠泓为</a> <span> . 2006</span> </span> </div> </li> </ul> <ul style="display: none;"> <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/patent-detail/06120208704822.html">一种海底地震仪安装架及海底地震仪</a> <b>[P]</b> . <span> 中国专利： CN208705487U </span> <span> . 2019.04.05</span> </div> </li> <li> <div> <b>2. </b><a class="enjiyixqcontent" href="/patent-detail/06120111499179.html">一种海底地震仪用电磁释放装置及海底地震仪</a> <b>[P]</b> . <span> 中国专利： CN108983294A </span> <span> . 2018-12-11</span> </div> </li> <li> <div> <b>3. </b><a class="enjiyixqcontent" href="/patent-detail/06130401240232.html">A seismic node for an ocean bottom seismic survey comprising a seismic sensor capsule and a seafloor casing, a method for performing an ocean bottom seismic survey and the use of the seismic node for achieving the method</a> <b>[P]</b> . <span> 外国专利：  NO344845B1 </span> <span> . 2020-05-25</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：用于海底地震勘测的地震节点，包括地震传感器囊体和海底壳体;执行海底地震勘测的方法;以及地震节点用于实现该方法的用途 </span> </p> </li> <li> <div> <b>4. </b><a class="enjiyixqcontent" href="/patent-detail/06130401241450.html">A seismic node for an ocean bottom seismic survey comprising a seismic sensor capsule and a seafloor casing, a method for performing an ocean bottom seismic survey and the use of the seismic node for achieving the method</a> <b>[P]</b> . <span> 外国专利：  NO20180995A1 </span> <span> . 2020-01-13</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：用于海底地震勘测的地震节点，包括地震传感器囊体和海底壳体;执行海底地震勘测的方法;以及地震节点用于实现该方法的用途 </span> </p> </li> <li> <div> <b>5. </b><a class="enjiyixqcontent" href="/patent-detail/06130430862477.html">METHOD FOR COUPLING SEISMOMETERS AND SEISMIC SOURCES TO THE OCEAN FLOOR</a> <b>[P]</b> . <span> 外国专利：  US2009238647A1 </span> <span> . 2009-09-24</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：地震仪与震源耦合到海底的方法 </span> </p> </li> </ul> </div> </div> </div> <div class="theme cardcommon" style="overflow: auto;display:none"> <h3 class="all_title" id="enpatent55">相关主题</h3> <ul id="subject"> </ul> </div> </div> </div> </div> <div class="right rightcon"> <div class="details_img cardcommon clearfix" style="margin-bottom: 10px;display:none;" > </div> </div> </div> <div id="thesis_get_original1" class="downloadBth" style="bottom: 19px;z-index: 999;" onclick="ywcd('0704019849607','4',7,2,1,'',this,24)" class="delivery" prompt="010401" title="通过人工服务将文献原文发送至邮箱" >获取原文</div> <div class="journalsub-pop-up" style="display: none"> 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