@article{fdi:010085862,
  title = {{A}sh and gas discharge during open vent activity at {E}l {R}eventador ({E}cuador) : explosion-style transitions driven by conduit capping},
  author = {{V}asconez, {F}. and {M}oussallam, {Y}ves and {B}ani, {P}hilipson and {B}attaglia, {J}. and {H}idalgo, {S}. and {B}enbakkar, {M}. and {H}arris, {A}. {J}. {L}. and {N}arvaez, {D}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}ince the {VEI} 4 eruption of {N}ovember 2002, {E}l {R}eventador volcano ({E}cuador) has been the site of persistent open-vent activity characterized by frequent (hourly) {V}ulcanian-strombolian explosions and occasional (every few years) effusion of lava flows. {T}he conduit processes that sustain this continuous eruptive activity are still poorly understood. {H}ere, we combine high temporal resolution thermal infrared imaging with seismic recordings and {DOAS}-derived {SO}2 fluxes focusing on a period of {V}ulcanian-style activity on 22-23 {F}ebruary 2017. {T}hermal imagery captured the emission and ascent dynamics of 26 plumes during the observation period, including those fed by explosions and degassing episodes. {W}hile most explosions have associated seismic signals, a few are marked by the absence of measurable seismic activity. {D}egassing episodes also show very few associated seismic signals. {E}xplosions and degassing events seem to follow a sequence that can be explained by changes in the conduit permeability associated with rapid (over time scales of minutes) rheological stiffening of magma in the uppermost portion of the conduit to reduce degassing efficiency. {P}eriods of open-vent outgassing alternate with periods of conduit capping resulting in system pressurization and leading to {V}ulcanian explosions that re-open the conduit allowing outgassing to resume.},
  keywords = {{V}ulcanian explosion ; {S}trombolian explosion ; {A}sh venting ; {O}pen vent ; {E}cuador ; {EQUATEUR} ; {ANDES} ; {REVENTADOR} {VOLCAN}},
  booktitle = {},
  journal = {{B}ulletin of {V}olcanology},
  volume = {84},
  numero = {8},
  pages = {77 [14 ]},
  ISSN = {0258-8900},
  year = {2022},
  DOI = {10.1007/s00445-022-01585-1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010085862},
}