High-speed lava flow infrasound from Kīlauea’s fissure 8 and its utility in monitoring effusion rate
High-speed lava flow infrasound from Kīlauea’s fissure 8 and its utility in monitoring effusion rate
复制标题
来自凯劳厄亚裂缝 8 的高速熔岩流次声波及其在监测渗出率中的应用
DOI:
10.1007/s00445-021-01488-7
复制
发表时间:
2021
影响因子:
3.5
通讯作者:
Fee, David
中科院分区:
文献类型:
--
作者:
Lyons, John J.;Dietterich, Hannah R.;Patrick, Matthew P.;Fee, David
The 2018 eruption of Kīlauea Volcano produced large and destructive lava flows from the fissure 8 (Ahu ‘aila ‘au) vent with flow velocities up to 17 m s−1, highly variable effusion rates over both short (minutes) and long (hours) time scales, and a proximal channel or spillway that displayed flow features similar to open channel flow in river systems. Monitoring such dynamic vent and lava flow systems is a challenge. Our results demonstrate that infrasound, combined with ground-based observations and imagery from unoccupied aircraft systems (UAS), can be used to distinguish vent degassing activity from high-speed lava flow activity. We use spectral characteristics and the infrasound frequency index (FI) to distinguish spillway infrasound from vent infrasound. Comparing FI with flow speeds derived from UAS videos reveals that spillway infrasound only occurs when flow speeds were sufficiently high to cause a supercritical flow state and breaking waves (Froude values > 1.7), and we propose that the spillway signals are produced primarily through the interaction of the turbulent lava-free surface with the atmosphere. We show that FI can also provide a means to track bulk effusion rate. Our results indicate that infrasound offers a new way to characterize lava flow channel hydraulics and is a powerful tool for monitoring effusive eruptions when high-speed flows are possible.
登录
查看更多内容
DOI:
10.1016/j.jvolgeores.2020.106944
发表时间:
2020-09-01
影响因子:
2.9
作者:
Le Moigne, Y.;Zurek, J. M.;Anzieta, J.
通讯作者:
Anzieta, J.
影响因子:
5.2
作者:
M. Garcés;A. Harris;C. Hetzer;Jeffrey R. Johnson;S. Rowland;E. Marchetti;P. Okubo
通讯作者:
P. Okubo
影响因子:
5.2
作者:
D. Fee;M. Garcés;T. Orr;M. Poland
通讯作者:
M. Poland
影响因子:
5.2
作者:
T. Ronan;J. Lees;T. Mikesell;Jacob F. Anderson;Jeffrey B. Johnson
通讯作者:
Jeffrey B. Johnson
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
R. Matoza;D. Fee;M. Garcés
通讯作者:
M. Garcés