Tracking dike propagation leading to the 2018 Kīlauea eruption
Tracking dike propagation leading to the 2018 Kīlauea eruption
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追踪导致 2018 年基拉韦厄火山喷发的堤坝传播
DOI：
10.1016/j.epsl.2020.116653
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发表时间：
2021
影响因子：
5.3
通讯作者：
P. Okubo
中科院分区：
文献类型：
--
作者：
O. Lengliné;Z. Duputel;P. Okubo
2018年5月，Kī劳埃亚火山的下东裂谷带发生大喷发。火山喷发始于Pu‘u’Ō‘ō陨石坑的坍塌，随后在一个仪器齐全的地区发生了长达20多公里的大裂谷堤坝入侵。这一大型火山事件是推断岩浆转移动力学的难得机会，而岩浆转移往往很难捕捉到。在这项研究中，我们利用地震记录来推断堤防的迁移。在岩浆侵入过程中，我们探测、拾取和定位了6000多次地震。利用这些位置和近场地震振幅，我们可以精确地重建堤坝随时间的演变。结果表明，这种迁移符合与岩浆室有关的岩脉生长的对数模型。储集层内压力的降低也与我们观测得到的堤防传播模型相一致。这项工作鼓励从地震学数据和物理模型的结合来实时监测岩浆侵入。
In May 2018, a major eruption occurred in the lower East Rift Zone of the Kīlauea volcano. The eruption started with the collapse of the Pu'u 'Ō'ō crater followed by a large downrift dike intrusion for more than 20 km in a well instrumented region. This large volcanic event is a rare opportunity to infer the dynamics of magma transfer that is often difficult to capture. In this study, we use seismological records to infer the migration of the dike. We detect, pick and locate more than 6000 earthquakes during the course of the magma intrusion. Using these locations together with near-field seismic amplitudes, we can precisely reconstruct the progression of the dike over time. We show that this migration is consistent with a logarithmic model of dike growth connected to a feeding magma chamber. The decrease of pressure inside the reservoir is also consistent with the dike propagation model derived from our observations. This work encourages real time monitoring of magma intrusions from the combination of seismological data and physical models.
影响因子：
5.2
作者：
Grossman‐Ponemon, Benjamin E.;Heimisson, Elías R.;Lew, Adrian J.;Segall, Paul
通讯作者：
Segall, Paul