ABSTRACT

UAVs have become a useful tool for natural hazard monitoring. In volcanic areas, they allow wider observations of the eruptive behaviour, with no risk for the operator. The SfM technique enables obtaining orthoimages of lava flows and a DEM in a short time. These data are also useful to estimate lava flow volumes and the mass output rate characterizing an eruption. We present the results of ten UAV surveys made during and after the 30 May – 6 June 2019 eruption of Etna volcano, projecting the data in a time context back until 1999. Orthoimages taken on different days allowed monitoring the morpho-structural evolution of the fissures, capturing the lava flows propagation and the accumulation of pyroclastic deposits. From 1999 to 2018, there were nine flank-eruptions and dozens of summit-eruptions, which for graphic simplicity have been grouped by year in the map. The resulting map represents the most updated of the recent lava flows of Etna.

摘要

无人机已经成为自然灾害监测的有用工具。在火山地区，它们可以对喷发行为进行更广泛的观察，而对操作人员没有风险。SfM技术可以在短时间内获得熔岩流和DEM的正像。这些数据也可用于估计熔岩流量和表征喷发的质量输出率。我们介绍了在2019年5月30日至6月6日埃特纳火山喷发期间和之后进行的十次无人机调查的结果，将数据投影到1999年之前的时间范围内。在不同日期拍摄的正射影像可以监测裂隙的形态结构演化，捕获熔岩流的传播和火山碎屑沉积物的积累。从1999年到2018年，共有9次侧翼爆发和数十次顶峰爆发，为了图形简洁起见，已在地图中按年份分组。生成的地图代表了埃特纳火山最近熔岩流的最新信息。