Seismo-acoustics of Tungurahua volcano, Ecuador
Seismo-acoustics of Tungurahua volcano, Ecuador
复制标题
厄瓜多尔通古拉瓦火山的地震声学
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
P. Bolívar
中科院分区：
文献类型：
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作者：
P. Palacios;P. Bolívar
火山爆发产生的地震波和声波分别穿过地面和空气，在空气-地面边界相互作用。本文介绍了这些信号的研究，以及它们如何在五个持续喷发通古拉瓦火山，厄瓜多尔之间的相关性。众所周知，在震源研究中，场地效应的校正是必要的。不太为人所知的是，声波在空气-地面界面耦合后，对场地效应也很敏感，从而干扰了地震记录。在这项研究中，开发了一种新的程序，使用地震噪声的场地效应校正，它表明，地震源的位置改善后，应用这种校正。从关于射流的声学研究中，众所周知，在固定位置记录的声强度取决于射流速度。在这里，有人提出，持续喷发期间产生的波的地震强度取决于通过管道喷出的气体-火山碎屑混合物的流速，
火山羽流并产生声波此外，地震和声学指标
Explosive volcanic eruptions produce seismic and acoustic waves that travel through the ground and air, respectively, interacting at the air-ground boundary. This thesis presents a study of these signals and how they correlate during five sustained eruptions at Tungurahua volcano, Ecuador. It is well known that corrections for site effects can be necessary in the study of seismic sources. What is less well known is that acoustic waves, after coupling at the air-ground interface, are also sensitive to site effects, thereby influencing seismic records. In this study a new procedure for site effect corrections that uses seismic noise is developed and it is shown that seismic source locations improve after applying such corrections. From acoustic studies about jets, it is well known that the acoustic intensity recorded at a fixed location depends on the jet velocity. Here, it is proposed that the seismic intensities of waves produced during sustained eruptions depend on the flow velocity of the gas-pyroclast mixture that is ejected through the conduit, which forms the
volcanic plume and generates the acoustic waves. Additionally, seismic and an acoustic indices