Theoretical basis of the amplitude source location method for volcano‐seismic signals

机译：火山地震信号幅度源定位方法的理论基础

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Abstract > The source location method using high‐frequency seismic amplitudes based on the assumption of isotropic radiation of <fi>S</fi> waves has been used successfully to locate seismic events and tremor at volcanoes. This amplitude source location (ASL) method overcomes the limitations of traditional hypocenter determination methods that use onset arrival times and has great potential to improve volcano‐seismic monitoring and the investigation of source processes of volcano‐seismic signals. However, theoretical justification of the basic assumption used in the ASL method has not been provided in previous studies. In this study, we tested the ASL method by using seismic waveforms simulated with a finite difference method in realistic heterogeneous volcanic structures with intrinsic attenuation and topography. Our results showed that ASL determinations were successful when using waveforms characterized by multiple scattering that can be approximated by the diffusion model. We found that the energy solution of the diffusion model provided an amplitude‐distance relation that is similar to that used in the ASL method. Our results suggest that the ASL method is applicable to high‐frequency seismograms in highly heterogeneous media with transport mean free paths of 10 3 ?m or smaller and strong intrinsic attenuation. These medium parameters are consistent with those estimated at various volcanoes. Our study validates the basic assumption of the ASL method and justifies its use to locate the sources of high‐frequency seismic signals observed at volcanoes. </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> >使用高频地震振动的源定位方法基于<fi> s </ fi>的各向同性辐射的假设波浪已经成功地用于在火山找到地震事件和震颤。该幅度源位置（ASL）方法克服了使用发作到达时间的传统次间隔测定方法的局限性，并且具有改善火山地震监测和火山地震信号源过程的潜力的巨大潜力。然而，在先前的研究中尚未提供ASL方法中使用的基本假设的理论辩护。在这项研究中，我们通过使用具有固有衰减和地形的现实异质火山结构中的有限差分法模拟的地震波形来测试ASL方法。我们的结果表明，当使用可以由扩散模型近似的多次散射的波形时，ASL测定是成功的。我们发现扩散模型的能量解决方案提供了类似于AS1方法中使用的幅度距离关系。我们的研究结果表明，ASL方法适用于高度异质介质中的高频地震图，其运输意味着10 3 </ sup>Δm或更小和强的内在衰减。这些媒体参数与各种火山估计的那些参数一致。我们的研究验证了ASL方法的基本假设，并证明了其用于定位在火山上观察到的高频地震信号的来源。 </ 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14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=Morioka Hanae&option=202" target="_blank" rel="nofollow">Morioka Hanae;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Kumagai Hiroyuki&option=202" target="_blank" rel="nofollow">Kumagai Hiroyuki;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Maeda Takuto&option=202" target="_blank" rel="nofollow">Maeda Takuto;</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>Graduate School of Environmental StudiesNagoya UniversityNagoya Japan;</p> <p>Graduate School of Environmental StudiesNagoya UniversityNagoya Japan;</p> <p>Earthquake Research InstituteUniversity of TokyoTokyo 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=scattering&option=203" rel="nofollow">scattering;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=finite difference method&option=203" rel="nofollow">finite difference method;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=diffusion model&option=203" rel="nofollow">diffusion model;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=isotropic radiation&option=203" rel="nofollow">isotropic radiation;</a> </p> <div class="translation"> 机译：散射;有限差分法;扩散模型;各向同性辐射; </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/0704020651517.html">Theoretical basis of the amplitude source location method for volcano-seismic signals</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Morioka Hanae&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Morioka Hanae,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Kumagai Hiroyuki&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Kumagai Hiroyuki,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Maeda Takuto&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Maeda Takuto </a> <a href="/journal-foreign-34656/" target="_blank" rel="nofollow" class="tuijian_authcolor">Journal of Geophysical Research. 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