Dense Seismic Array Studies of Kilauea Volcano Hawaii

9725310次麦克纳特火山地震和震动通常在火山喷发之前发生。然而，人们对这些特殊信号知之甚少。为了加深我们的了解，一个由来自美国、日本和意大利的25名科学家和技术人员组成的国际团队于1996年1月和1997年2月与美国地质调查局夏威夷火山观测站的工作人员一起，使用有史以来安装在火山上的最多地震仪器，对基拉韦厄火山进行了有史以来最详细的地震记录。从1996年1月11日开始，在夏威夷火山国家公园的基拉韦厄火山口及其附近安装了116台便携式地震仪，作为日本和美国的一个联合研究项目，以记录火山地震和震动。1996年2月1日，密集的台网记录了500多次震群，这是基拉韦厄地震群记录最好的一次。1997年2月，第二阶段实验的网络记录到了熔岩的第二次侵入。收集到的数据为理解与岩浆运输相关的地震提供了一个前所未有的机会。许多火山都发生了类似的事件，它们将有助于预测喷发。我们将研究：1)P波和S波层析成像以了解火山的结构；2)阵列的充分性以找到放置仪器的最佳位置；3)现场响应和信号变异性以了解火山的复杂性。之所以选择这些作为初步分析，是因为我们的兴趣和专业知识，以及预期结果的广泛适用性。

9725310 McNutt Volcanic earthquakes and tremor commonly precede volcanic eruptions. However, these special signals are poorly understood. To improve our understanding, an international team of 25 scientists and technicians from the United States, Japan, and Italy joined the staff of the U.S.G.S. Hawaiian Volcano Observatory in January 1996 and February 1997 to make the most detailed seismic recordings on Kilauea Volcano ever, using the largest total number of seismic instruments ever installed on a volcano. One hundred-sixteen portable seismographs were installed beginning January 11, 1996 in and near Kilauea Crater in Hawaii Volcanoes National Park as a joint Japan-United States research project to record volcanic earthquakes and tremor. On February 1, 1996, a swarm of over 500 earthquakes was recorded by the dense network, providing the best recording of an earthquake swarm at Kilauea. In February 1997, a second intrusion of molten rock was recorded by the networks in place for Phase II of the experiment. The data collected offer an unprecedented opportunity to understand earthquakes associated with magma transport. Similar events occur at many volcanoes and they will be useful to forecast eruptions. We will study: 1) P- and S-wave tomography to learn about the structure of the volcano, 2) array sufficiency to find the best places to locate instruments, and 3) site response and signal variability to understand volcanic complexity. These were chosen for initial analyses because of our interest and expertise and because of the broad applicability of the expected results.