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High‐resolution digital elevation model from tri‐stereo Pleiades‐1 satellite imagery for lava flow volume estimates at Fogo Volcano

AuthorsBagnardi, Marco; González, Pablo J. ; Hooper, Andrew
KeywordsHigh‐resolution topography
2014–2015 Fogo eruption
Magma supply
Earth observation data
Erupted volume
Issue Date28-Jun-2016
PublisherAmerican Geophysical Union
CitationGeophysical Research Letters 43(12): 6267-6275 (2016)
AbstractResolving changes in topography through time using accurate high‐resolution digital elevation models (DEMs) is key to understanding active volcanic processes. For the first time in a volcanic environment, we utilize very high‐resolution tri‐stereo optical imagery acquired by the Pleiades‐1 satellite constellation and generate a 1 m resolution DEM of Fogo Volcano, Cape Verde—the most active volcano in the Eastern Atlantic region. Point cloud density is increased by a factor of 6.5 compared to conventional stereo imagery, and the number of 1 m2 pixels with no height measurements is reduced by 43%. We use the DEM to quantify topographic changes associated with the 2014–2015 eruption at Fogo. Height differences between the posteruptive Pleiades‐1 DEM and the preeruptive topography from TanDEM‐X give a lava flow volume of 45.83 ± 0.02 × 106 m3, emplaced over an area of 4.8 km2 at a mean rate of 6.8 m3 s−1.
Publisher version (URL)https://doi.org/10.1002/2016GL069457
Appears in Collections:(IPNA) Artículos
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