Abstract 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.

中文翻译：

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追踪导致 2018 年基拉韦厄火山喷发的堤坝传播

摘要 2018年5月，基拉韦厄火山下东裂谷带发生大喷发。喷发开始于 Pu'u 'Ō'ō 火山口的坍塌，随后在一个仪器齐全的地区发生了 20 多公里的大型下裂堤侵入。这次大型火山事件是推断通常难以捕捉的岩浆迁移动力学的难得机会。在这项研究中，我们使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、挑选和定位了 6000 多次地震。使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进展。我们表明这种迁移与连接到供给岩浆房的堤坝生长的对数模型一致。储层内部压力的降低也与我们观察得出的堤坝扩展模型一致。这项工作鼓励结合地震学数据和物理模型对岩浆侵入进行实时监测。