Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/11908
Authors: Calvari, Sonia* 
Ganci, Gaetana* 
Victória, Sónia Silva* 
Hernandez, Pedro A.* 
Perez, Nemesio M.* 
Alfama, Vera* 
Barrancos, José* 
Cabral, Jeremias* 
Cardoso, Nadir* 
Dionis, Samara* 
Fernandes, Paulo* 
Melian, Gladys* 
Pereira, José* 
Semedo, Hélio* 
Padilla, Germán* 
Rodriguez, Fátima* 
Title: Satellite and Ground Remote Sensing Techniques to Trace the Hidden Growth of a Lava Flow Field: The 2014-15 Effusive Eruption at Fogo Volcano (Cape Verde)
Issue Date: 12-Jul-2018
Series/Report no.: /10(2018)
DOI: 10.3390/rs10071115
URI: http://hdl.handle.net/2122/11908
Keywords: Fogo volcano
lava flow inflation
lava tubes
time averaged discharge rate
magma supply rate
Subject Classificationvolcanic hazard
remote sensing monitoring
effusive eruption
Abstract: Fogo volcano erupted in 2014–2015 producing an extensive lava flow field in the summit caldera that destroyed two villages, Portela and Bangaeira. The eruption started with powerful explosive activity, lava fountains, and a substantial ash column accompanying the opening of an eruptive fissure. Lava flows spreading from the base of the eruptive fissure produced three arterial lava flows. By a week after the start of the eruption, a master lava tube had already developed within the eruptive fissure and along the arterial flow. In this paper, we analyze the emplacement processes based on observations carried out directly on the lava flow field, remote sensing measurements carried out with a thermal camera, SO2 fluxes, and satellite images, to unravel the key factors leading to the development of lava tubes. These were responsible for the rapid expansion of lava for the ~7.9 km length of the flow field, as well as the destruction of the Portela and Bangaeira villages. The key factors leading to the development of tubes were the low topography and the steady magma supply rate along the arterial lava flow. Comparing time-averaged discharge rates (TADR) obtained from satellite and Supply Rate (SR) derived from SO2 flux data, we estimate the amount and timing of the lava flow field endogenous growth, with the aim of developing a tool that could be used for hazard assessment and risk mitigation at this and other volcanoes.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
Calvari et al 2018-Fogo.pdfpublished pdf4.76 MBAdobe PDFView/Open
Show full item record

Page view(s)

24
Last Week
0
Last month
checked on May 27, 2019

Download(s)

9
checked on May 27, 2019

Google ScholarTM

Check

Altmetric