Volcanic eruption volume flux estimations from very long period infrasound signals
Volcanic eruption volume flux estimations from very long period infrasound signals
复制标题
根据超长周期次声信号估算火山喷发体积通量
DOI:
10.1002/2016gl071047
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
M.
中科院分区:
文献类型:
--
作者:
Yamada;T.;Aoyama;H.;Nishimura;T.;Iguchi;M. and Hendrasto;M.
We examine very long period infrasonic signals accompanying volcanic eruptions near active vents at Lokon‐Empung volcano in Indonesia, Aso, Kuchinoerabujima, and Kirishima volcanoes in Japan. The excitation of the very long period pulse is associated with an explosion, the emerging of an eruption column, and a pyroclastic density current. We model the excitation of the infrasound pulse, assuming a monopole source, to quantify the volume flux and cumulative volume of erupting material. The infrasound‐derived volume flux and cumulative volume can be less than half of the video‐derived results. A largely positive correlation can be seen between the infrasound‐derived volume flux and the maximum eruption column height. Therefore, our result suggests that the analysis of very long period volcanic infrasound pulses can be helpful in estimating the maximum eruption column height.
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