%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Bani, Philipson
%A Harris, A. J. L.
%A Shinohara, H.
%A Donnadieu, F.
%T Magma dynamics feeding Yasur's explosive activity observed using thermal infrared remote sensing
%D 2013
%L fdi:010060623
%G ENG
%J Geophysical Research Letters
%@ 0094-8276
%K thermal sensing ; explosive activity ; Yasur volcano
%K VANUATU
%M ISI:000323660000009
%N 15
%P 3830-3835
%R 10.1002/grl.50722
%U https://www.documentation.ird.fr/hor/fdi:010060623
%> https://www.documentation.ird.fr/intranet/publi/2013/09/010060623.pdf
%V 40
%W Horizon (IRD)
%X A thermal infrared thermometer was used to record the passage of hot gases and fragments across a measurement area located at the exit of one of Yasur's active vents. Recording was completed over 2h during September 2011. A total of 200 explosive events were recorded. We define two types of event: low-energy events with typical thermal energies of 14kJ and high-energy events with typical thermal energies of 97kJ. Around 180 low-energy events were recorded, which together released 457kJ of radiant energy. In contrast, only 20 high-energy events were recorded, but they released 2042kJ. We suggest that low-energy events originate from a relatively shallow, degassed magma reservoir and are associated with bursting of bubbles formed by bubble coalescence during ascent. Instead, high-energy events originate from a relatively deep, fresh magma reservoir and are associated with slugs formed by foam collapse.
%$ 066 ; 126