Di Traglia Federico, Battaglia Maurizio, Nolesini Teresa, Lagomarsino Daniela, Casagli Nicola
Dipartimento di Scienze della Terra, Università di Firenze Via La Pira 4, Firenze.
Dipartimento di Scienze della Terra, Università di Roma "La Sapienza", Piazzale Aldo Moro 5, 00185, Roma, Italy.
Sci Rep. 2015 Sep 1;5:13569. doi: 10.1038/srep13569.
Ground-Based Interferometric Synthetic Aperture Radar (GBInSAR) is an efficient technique for capturing short, subtle episodes of conduit pressurization in open vent volcanoes like Stromboli (Italy), because it can detect very shallow magma storage, which is difficult to identify using other methods. This technique allows the user to choose the optimal radar location for measuring the most significant deformation signal, provides an exceptional geometrical resolution, and allows for continuous monitoring of the deformation. Here, we present and model ground displacements collected at Stromboli by GBInSAR from January 2010 to August 2014. During this period, the volcano experienced several episodes of intense volcanic activity, culminated in the effusive flank eruption of August 2014. Modelling of the deformation allowed us to estimate a source depth of 482 ± 46 m a.s.l. The cumulative volume change was 4.7 ± 2.6 × 10(5) m(3). The strain energy of the source was evaluated 3-5 times higher than the surface energy needed to open the 6-7 August eruptive fissure. The analysis proposed here can help forecast shifts in the eruptive style and especially the onset of flank eruptions at Stromboli and at similar volcanic systems (e.g. Etna, Piton de La Fournaise, Kilauea).
地基干涉合成孔径雷达（GBInSAR）是一种有效的技术，可用于捕捉像意大利斯特龙博利这样的开放式火山口管道增压的短暂、细微事件，因为它能够探测到非常浅的岩浆储存区，而这用其他方法很难识别。该技术允许用户选择最佳雷达位置以测量最显著的变形信号，提供卓越的几何分辨率，并能对变形进行连续监测。在此，我们展示并模拟了2010年1月至2014年8月期间GBInSAR在斯特龙博利收集到的地面位移数据。在此期间，该火山经历了几次强烈的火山活动，最终在2014年8月发生了溢流性侧翼喷发。对变形的模拟使我们能够估计源深度为海拔482±46米。累积体积变化为4.7±2.6×10⁵立方米。源的应变能评估结果比打开8月6 - 7日喷发裂缝所需的表面能高3 - 5倍。这里提出的分析有助于预测斯特龙博利以及类似火山系统（如埃特纳火山、富尔奈斯火山峰、基拉韦厄火山）喷发方式的转变，尤其是侧翼喷发的开始。
