Publications des scientifiques de l'IRD

Morales Rivera A. M., Amelung F., Mothes P., Hong S. H., Nocquet Jean-Mathieu, Jarrin P. (2017). Ground deformation before the 2015 eruptions of Cotopaxi volcano detected by InSAR. Geophysical Research Letters, 44 (art. 13 [9 p.]), p. 6607-6615. ISSN 0094-8276.

Titre du document
Ground deformation before the 2015 eruptions of Cotopaxi volcano detected by InSAR
Année de publication
2017
Type de document
Article référencé dans le Web of Science WOS:000406257400016
Auteurs
Morales Rivera A. M., Amelung F., Mothes P., Hong S. H., Nocquet Jean-Mathieu, Jarrin P.
Source
Geophysical Research Letters, 2017, 44 (art. 13 [9 p.]), p. 6607-6615 ISSN 0094-8276
Cotopaxi volcano started a period of volcanic unrest in April 2015 that led to a series of eruptions between August and November 2015. We use COSMO-SkyMed Interferometric Synthetic Aperture Radar supported by continuous GPS observations spanning the period of 2014-2016 to obtain time-dependent ground deformation data over Cotopaxi volcano related to the period of unrest and onset of eruptions. We find evidence of precursory deformation, with a maximum uplift on the western flank of 3.4 cm from April to August 2015. Deformation is explained by an inclined sheet intrusion located a few km southwest of the summit with an opening volume of 6.8 x 10(6)m(3), extending from a depth of 12.1 km and shallowing to 5.5 km below the summit, that contributed to internal edifice growth. The temporal coincidence of deformation prior to the eruptions potentially suggests that short-term eruptions at Cotopaxi are partly controlled by episodic edifice growth.
Plan de classement
Géophysique interne [066]
Description Géographique
EQUATEUR ; COTOPAXI VOLCAN
Localisation
Fonds IRD [F B010070320]
Identifiant IRD
fdi:010070320
Contact