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3‐D Modeling of Irregular Volcanic Sources Using Sparsity‐Promoting Inversions of Geodetic Data and Boundary Element Method

机译：使用稀释性数据和边界元法的稀疏性促进副作用的不规则火山源的3-D模型

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Abstract > Geodetic observations of surface deformation associated with volcanic activities can be used to constrain volcanic source parameters and their kinematics. Simple analytical models, such as point and spherical sources, are widely used to model deformation data. The inherent nature of oversimplified model geometries makes them unable to explain fine details of surface deformation. Current nonparametric, geometry‐free inversion approaches resolve the distributed volume change, assuming it varies smoothly in space, which may detect artificial volume change outside magmatic source regions. To obtain a physically meaningful representation of an irregular volcanic source, we devise a new sparsity‐promoting modeling scheme assuming active magma bodies are well‐localized melt accumulations, namely, outliers in the background crust. First, surface deformation data are inverted using a hybrid <fi>L</fi> <sub>1</sub> ‐ and <fi>L</fi> <sub>2</sub> ‐norm regularization scheme to solve for sparse volume change distributions. Next, a boundary element method is implemented to solve for the displacement discontinuity distribution of the reservoir, which satisfies a uniform pressure boundary condition. The inversion approach is thoroughly validated using benchmark and synthetic tests, of which the results show that source dimension, depth, and shape can be recovered appropriately. We apply this modeling scheme to deformation observed at Kilauea summit for periods of uplift and subsidence leading to and following the 2007 Father's Day event. We find that the magmatic source geometries for these periods are statistically distinct, which may be an indicator that magma is released from isolated compartments due to large differential pressure leading to the rift intrusion. </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> >与火山活动相关的表面变形的大地测量观察可用于限制火山源参数及其运动学。简单的分析模型，例如点和球形来源，广泛用于模拟变形数据。超薄模型几何形状的固有性质使得它们无法解释表面变形的细节。目前的非参数，无几何反转方法解决分布式体积变化，假设它在空间中平稳变化，这可能检测岩浆源区外的人工体积变化。为了获得不规则的火山源的物理上有意义的代表，假设活跃的岩浆机构是局部熔体累积，即背景外壳的异常值。首先，使用混合<fi> l </ fi> <sub> 1 </ sub> - 和<fi> l </ fi> <sub> 2 </ sub> -norm正则化方案来反转表面变形数据。要解决用于稀疏音量变化分布。接下来，实施边界元件方法以解决储存器的位移不连续分布，其满足均匀的压力边界条件。使用基准和合成测试彻底验证了反转方法，其中结果表明可以适当地恢复源尺寸，深度和形状。我们将这种建模方案应用于利莱夫峰会在2007年父亲节举行的隆隆和沉降期间观察到的变形。我们发现，这些时段的岩石源几何形状在统计上是不同的，这可能是由于导致裂隙侵入的大的差压，岩浆从隔室释放的指示。 </ 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12期</span><b style="margin: 0 2px;">|</b><span>共23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=Zhai Guang&option=202" target="_blank" rel="nofollow">Zhai Guang;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Shirzaei Manoochehr&option=202" target="_blank" rel="nofollow">Shirzaei Manoochehr;</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>School of Earth and Space ExplorationArizona State UniversityTempe AZ USA;</p> <p>School of Earth and Space ExplorationArizona State UniversityTempe AZ USA;</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=sparsity regularization&option=203" rel="nofollow">sparsity regularization;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=geodetic inversion&option=203" rel="nofollow">geodetic inversion;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=magma chamber&option=203" rel="nofollow">magma chamber;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=irregular source geometry&option=203" rel="nofollow">irregular source geometry;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Kilauea volcano&option=203" rel="nofollow">Kilauea volcano;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=InSAR deformation&option=203" rel="nofollow">InSAR deformation;</a> </p> <div class="translation"> 机译：稀疏正规化;大地测量反转;岩浆室;不规则的源几何形状;利雷厄火山;INSAR变形; </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/0704025592795.html">3‐D Modeling of Irregular Volcanic Sources Using Sparsity‐Promoting Inversions of Geodetic Data and Boundary Element Method</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Zhai Guang&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Zhai Guang,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Shirzaei Manoochehr&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Shirzaei Manoochehr </a> <a href="/journal-foreign-34677/" target="_blank" rel="nofollow" class="tuijian_authcolor">Journal of geophysical research. 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