Detecting hidden volcanic explosions from Mt. Cleveland Volcano, Alaska with infrasound and ground‐coupled airwaves
Detecting hidden volcanic explosions from Mt. Cleveland Volcano, Alaska with infrasound and ground‐coupled airwaves
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利用次声波和地面耦合电波探测阿拉斯加克利夫兰火山隐藏的火山爆发
DOI：
10.1029/2012gl053635
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发表时间：
2012
影响因子：
5.2
通讯作者：
D. Schneider
中科院分区：
文献类型：
--
作者：
S. De Angelis;D. Fee;M. Haney;D. Schneider
在阿拉斯加，许多活火山没有地面仪器，使用适合远程监测的技术至关重要。在这项研究中，我们报道了对山上火山活动的区域尺度地震和次声观测。克利夫兰在2011年12月至2012年8月之间。在此期间，次声传感器在距离活动喷口1827公里的地方探测到20次爆炸，并在阿留申弧线上的地震台记录到地面耦合声波。通过对卫星遥感数据的分析，证实了顶峰陨石坑内的小熔岩穹顶爆炸破坏所造成的几个事件。然而，由于恶劣的天气条件，许多爆炸都没有对卫星数据进行初步的自动分析。次声和地震监测为探测这些隐藏事件提供了有效手段。我们介绍了自动次声和地震声喷发检测算法的实施结果，并审查了偏远地区实时火山监测作业的挑战。我们还模拟了北太平洋的声波传播，显示了对流层管道效应如何使次声能够在阿留申弧长距离传播。我们调查的成功结果为在整个阿留申山脉扩大次声监测工作提供了动力，并有助于我们了解火山喷发的数量和类型。克利夫兰。
In Alaska, where many active volcanoes exist without ground‐based instrumentation, the use of techniques suitable for distant monitoring is pivotal. In this study we report regional‐scale seismic and infrasound observations of volcanic activity at Mt. Cleveland between December 2011 and August 2012. During this period, twenty explosions were detected by infrasound sensors as far away as 1827 km from the active vent, and ground‐coupled acoustic waves were recorded at seismic stations across the Aleutian Arc. Several events resulting from the explosive disruption of small lava domes within the summit crater were confirmed by analysis of satellite remote sensing data. However, many explosions eluded initial, automated, analyses of satellite data due to poor weather conditions. Infrasound and seismic monitoring provided effective means for detecting these hidden events. We present results from the implementation of automatic infrasound and seismo‐acoustic eruption detection algorithms, and review the challenges of real‐time volcano monitoring operations in remote regions. We also model acoustic propagation in the Northern Pacific, showing how tropospheric ducting effects allow infrasound to travel long distances across the Aleutian Arc. The successful results of our investigation provide motivation for expanded efforts in infrasound monitoring across the Aleutians and contributes to our knowledge of the number and style of vulcanian eruptions at Mt. Cleveland.
影响因子：
5.3
作者：
Dabrowa, A. L.;Green, D. N.;Phillips, J. C.
通讯作者：
Phillips, J. C.