Unoccupied Aircraft Systems (UASs) Reveal the Morphological Changes at Stromboli Volcano (Italy) before, between, and after the 3 July and 28 August 2019 Paroxysmal Eruptions

Autor:	Piergiorgio Scarlato, Riccardo Civico, Daniele Andronico, Ulrich Kueppers, Emanuela De Beni, Markus Schmid, Elisabetta Del Bello, B. B. Carr, Jacopo Taddeucci, Massimo Cantarero, Tullio Ricci, Karen Strehlow, Luca Pizzimenti, Jeffrey B. Johnson
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	Volcanic hazards 010504 meteorology & atmospheric sciences Science photogrammetry 010502 geochemistry & geophysics 01 natural sciences Lava field Impact crater Structure-from-Motion Stromboli Tephra 0105 earth and related environmental sciences geography geography.geographical_feature_category Elevation Terrace (geology) Volcano 13. Climate action 2019 paroxysmal eruptions UAS Period (geology) General Earth and Planetary Sciences Physical geography Geology
Zdroj:	Remote Sensing; Volume 13; Issue 15; Pages: 2870 Remote Sensing, Vol 13, Iss 2870, p 2870 (2021)
ISSN:	2072-4292
DOI:	10.3390/rs13152870
Popis:	In July and August 2019, two paroxysmal eruptions dramatically changed the morphology of the crater terrace that hosts the active vents of Stromboli volcano (Italy). Here, we document these morphological changes, by using 2259 UAS-derived photographs from eight surveys and Structure-from-Motion (SfM) photogrammetric techniques, resulting in 3D point clouds, orthomosaics, and digital surface models (DSMs) with resolution ranging from 8.1 to 12.4 cm/pixel. We focus on the morphological evolution of volcanic features and volume changes in the crater terrace and the upper part of the underlying slope (Sciara del Fuoco). We identify both crater terrace and lava field variations, with vents shifting up to 47 m and the accumulation of tephra deposits. The maximum elevation changes related to the two paroxysmal eruptions (in between May and September 2019) range from +41.4 to −26.4 m at the lava field and N crater area, respectively. Throughout September 2018–June 2020, the total volume change in the surveyed area was +447,335 m3. Despite Stromboli being one of the best-studied volcanoes worldwide, the UAS-based photogrammetry products of this study provide unprecedented high spatiotemporal resolution observations of its entire summit area, in a period when volcanic activity made the classic field inspections and helicopter overflights too risky. Routinely applied UAS operations represent an effective and evolving tool for volcanic hazard assessment and to support decision-makers involved in volcanic surveillance and civil protection operations.
Databáze:	OpenAIRE
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