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首页> 外文期刊>Surveys in Geophysics: An International Review Journal of Geophysics and Planetary Sciences >Applying Fractal Dimensions and Energy-Budget Analysis to Characterize Fracturing Processes During Magma Migration and Eruption: 2011-2012 El Hierro (Canary Islands) Submarine Eruption
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Applying Fractal Dimensions and Energy-Budget Analysis to Characterize Fracturing Processes During Magma Migration and Eruption: 2011-2012 El Hierro (Canary Islands) Submarine Eruption

机译：应用分形维数和能量预算分析表征岩浆迁移和喷发过程中的压裂过程：2011-2012年El Hierro（加那利群岛）海底喷发

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摘要

The impossibility of observing magma migration inside the crust obliges us to rely on geophysical data and mathematical modelling to interpret precursors and to forecast volcanic eruptions. Of the geophysical signals that may be recorded before and during an eruption, deformation and seismicity are two of the most relevant as they are directly related to its dynamic. The final phase of the unrest episode that preceded the 2011-2012 eruption on El Hierro (Canary Islands) was characterized by local and accelerated deformation and seismic energy release indicating an increasing fracturing and a migration of the magma. Application of time varying fractal analysis to the seismic data and the characterization of the seismicity pattern and the strain and the stress rates allow us to identify different stages in the source mechanism and to infer the geometry of the path used by the magma and associated fluids to reach the Earth's surface. The results obtained illustrate the relevance of such studies to understanding volcanic unrest and the causes that govern the initiation of volcanic eruptions.
机译：不可能观测到地壳内部的岩浆迁移，这使我们不得不依靠地球物理数据和数学模型来解释前兆并预测火山喷发。在喷发之前和期间可能记录的地球物理信号中，形变和地震活动性是最相关的两个，因为它们直接与其动态有关。 El Hierro（加那利群岛）2011-2012年火山爆发之前的动荡事件的最后阶段的特征是局部和加速变形以及地震能量释放，表明裂隙增加和岩浆迁移。时变分形分析在地震数据中的应用以及地震活动模式，应变和应力率的表征，使我们能够确定震源机制的不同阶段，并推断岩浆和相关流体所使用的路径的几何形状到达地球的表面。所获得的结果说明了此类研究与理解火山动荡的相关性以及控制火山爆发爆发的原因。

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