Long‐range acoustic observations of the Eyjafjallajökull eruption, Iceland, April–May 2010
Long‐range acoustic observations of the Eyjafjallajökull eruption, Iceland, April–May 2010
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2010 年 4 月至 5 月冰岛埃亚菲亚德拉冰盖喷发的远程声学观测
DOI：
10.1029/2011gl047019
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发表时间：
2011
影响因子：
5.2
通讯作者：
Á. Höskuldsson
中科院分区：
文献类型：
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作者：
R. Matoza;J. Vergoz;A. Le Pichon;L. Ceranna;D. N. Green;L. Evers;M. Ripepe;P. Campus;L. Liszka;T. Kvaerna;E. Kjartansson;Á. Höskuldsson
2010年4月至5月，冰岛Eyjafjallajökull峰顶喷发，14个大气次声传感器阵列在1700至3700公里的范围内记录了下来，这表明中等规模喷发的次声可以在大气波导中传播数千公里。虽然传感器的大气传播条件和背景噪声水平的变化会产生信噪比和信号可探测性的波动，但阵列处理技术成功地区分了火山次声和环境相干和非相干噪声。目前的全球次声网络比以往任何操作的网络都要密集和敏感得多，并且经常记录大型火山爆发的信号。因为火山的次声是在向大气中爆炸性释放流体的过程中产生的，所以它是火山喷发发生的一个强有力的信号。因此，远程次声监测可以通过补充其他监测技术来帮助火山爆发探测，特别是在地面仪器网络稀疏的偏远地区。
The April–May 2010 summit eruption of Eyjafjallajökull, Iceland, was recorded by 14 atmospheric infrasound sensor arrays at ranges between 1,700 and 3,700 km, indicating that infrasound from modest‐size eruptions can propagate for thousands of kilometers in atmospheric waveguides. Although variations in both atmospheric propagation conditions and background noise levels at the sensors generate fluctuations in signal‐to‐noise ratios and signal detectability, array processing techniques successfully discriminate between volcanic infrasound and ambient coherent and incoherent noise. The current global infrasound network is significantly more dense and sensitive than any previously operated network and signals from large volcanic explosions are routinely recorded. Because volcanic infrasound is generated during the explosive release of fluid into the atmosphere, it is a strong indicator that an eruption has occurred. Therefore, long‐range infrasonic monitoring may aid volcanic explosion detection by complementing other monitoring technologies, especially in remote regions with sparse ground‐based instrument networks.