@article{fdi:010086945,
  title = {{T}racking the evolution of the summit lava dome of {M}erapi volcano between 2018 and 2019 using {DEM}s derived from {T}an{DEM}-{X} and {P}leiades data},
  author = {{G}remion, {S}. and {P}inel, {V}irginie and {S}hreve, {T}. and {B}eauducel, {F}ran{\c{c}}ois and {P}utra, {R}. and {S}olikhin, {A}. and {S}antoso, {A}. {B}. and {H}umaida, {H}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}t andesitic volcanoes, effusive lava flows and dome emplacement alternate with explosive, sometimes very destructive events. {I}t is thus crucial to obtain quantitative information on the dome volume emplaced as well as on the extrusion rate. {H}owever, steep slopes and continuous activity make it difficult to install field instruments near many volcano summits. {I}n this study, we take advantage of two high resolution remote-sensing datasets, {P}leiades (optical acquisitions in tri-stereo mode) and {T}an{DEM}-{X} (radar acquisitions in bistatic mode), to produce twenty {D}igital {E}levation {M}odels ({DEM}s) over the summit area of {M}erapi volcano, {I}ndonesia, between {J}uly 2018 and {D}ecember 2019. {W}e calculate the difference in elevation between each {DEM} and a reference {DEM} derived from {P}leiades images acquired in 2013, in order to track the evolution of the dome in the crater. {U}ncertainties are quantified for each dataset by a statistical analysis of areas with no change in elevation. {W}e show that the {DEM}s derived from {P}leiades and {T}an{DEM}-{X} data are consistent with each other and provide good spatiotemporal constraints on the evolution of the dome. {F}urthermore, the remote-sensing estimate of the lava volume is consistent with local drone measurements carried out by {BPPTKG} at the time of dome growth. {F}rom our {DEM}s, we show that the dome growth was sustained by a relatively small effusion rate of about 0.0336 +/- 0.0067 m(3).s(-1)(2900 +/- 580 m(3)/day) from {A}ugust 2018 to {F}ebruary 2019, when it reached a height of 40 m (+/- 5 m) and a volume of 0.64 {M}m(3) (+/- 0.03 {M}m(3)). {T}he lava dome initially grew radially, and then extended asymmetrically to the northwest and southeast starting in {O}ctober 2018. {F}rom {F}ebruary 2019 onwards, the dome elevation remained constant, but lava was continuously emitted. {L}ava supply was balanced by destabilization southwards downhill producing an accumulation zone of 400 m long and maximum 15 m (+/- 5 m) high with a volume of 0.37 {M}m(3) (+/- 0.29 {M}m(3)). {T}he measured accumulation rate between {F}ebruary and {S}eptember 2019 is 0.0094 +/- 0.001 m(3).s(-1)(810 +/- 90 m(3)/day). {I}n late 2019, several minor explosions partially destroyed the center of the dome. {T}his study highlights the strong potential of the joint use of {T}an{DEM}-{X} and {P}leiades {DEM}s to quantitatively monitor domes at andesitic stratovolcanoes.},
  keywords = {{T}an{DEM}-{X} ; {B}istatic interferometry ; {P}leiades ; {D}igital {E}levation {M}odels ; ({DEM}s) ; {L}ava dome volume ; {E}ffusion rate ; {INDONESIE} ; {MERAPI} {VOLCAN}},
  booktitle = {},
  journal = {{J}ournal of {V}olcanology and {G}eothermal {R}esearch},
  volume = {433},
  numero = {},
  pages = {107732 [20 p.]},
  ISSN = {0377-0273},
  year = {2023},
  DOI = {10.1016/j.jvolgeores.2022.107732},
  URL = {https://www.documentation.ird.fr/hor/fdi:010086945},
}