We present a joint exploitation of space-borne and ground-based Synthetic Aperture Radar Interferometry (InSAR) and Multi Temporal (MT) InSAR measurements for investigating the Stromboli volcano (Italy) deformation phenomena. In particular, we focus our analysis on three periods: a) the time interval following the 2014 flank eruption, b) the July–August 2019 eruption and c) the following post-eruptive phase. To do this, we take advantage from an unprecedented set of space-borne and ground-based SAR data collected from April 2015 up to November 2019 along two (one ascending and one descending) Sentinel-1 (S-1) tracks, as well as, in the same period, by two ground-based systems installed along the Sciara del Fuoco northern rim. Such data availability permitted us to first characterize the volcano long-term 3D deformation behavior of the pre-eruptive period (April 2015–June 2019), by jointly inverting the space-borne and ground-based InSAR measurements. Then, the GB-SAR measurements allowed us to investigate the sin-eruptive time span (3rd July 2019 – 30th August 2019) which revealed rapid deformation episodes (e.g. more than 30 mm/h just 2 min before the 3rd July 2019 explosion) associated with the eruptive activity, that cannot be detected with the weekly S-1 temporal sampling. Finally, the S-1 measurements permitted to better constrain the post 2019 eruption deformations (31st August 2019 – 5th November 2019), which are mainly located outside the GB-SAR sensed area. The presented results demonstrate the effectiveness of the joint exploitation of the InSAR measurements obtained through satellite and terrestrial SAR systems, highlighting their strong complementarity to map and interpret the deformation phenomena affecting volcanic areas.

我们目前联合研究天基和地面合成孔径雷达干涉测量法（InSAR）和多时相（MT）InSAR测量技术，以研究斯特龙博利火山（意大利）的变形现象。特别是，我们将分析重点放在三个时期：a）2014年侧面爆发之后的时间间隔，b）7月至2019年8月爆发期间，以及c）接下来的爆发之后阶段。为此，我们利用了从2015年4月至2019年11月沿两条（一条上升和一条下降）Sentinel-1（S-1）轨道收集的空前和地面SAR数据集，这是前所未有的。例如，在同一时期内，沿着Sciara del Fuoco北缘安装了两个地面系统。此类数据的可用性使我们能够通过联合反转星载和地面InSAR测量来表征喷发前期（2015年4月至2019年6月）的火山长期3D变形行为。然后，GB-SAR测量使我们能够研究正弦喷发时间跨度（2019年7月3日至2019年8月30日），该时间跨度揭示了相关的快速变形事件（例如，在2019年7月3日爆炸前2分钟超过30毫米/小时）爆发活动，每周的S-1时间采样无法检测到。最后，S-1测量值可以更好地限制2019年后的喷发变形（2019年8月31日至2019年11月5日），这些变形主要位于GB-SAR感测区域之外。