A study of SO2 emissions and ground surface displacements at Lastarria Volcano, Antofagasta region, northern Chile [Diplômes, Thèses] / Krewcun, Lucie G. Auteur ; Froger, Jean-Luc. Encadrant
Langue : afrikaans.Publication : [s.n], 2013Description : 59 p.Collection: Master 2 Recherche : Laboratoire Magmas & Volcans ; 2013Sujet: Volcan -- Lastarria -- Chilie Dioxyde de souffre Matlab Ressources en ligne :Cliquez ici pour consulter en ligne| Type de document | Site actuel | Cote | Statut | Notes | Date de retour prévue | Code à barres |
|---|---|---|---|---|---|---|
| Diplômes, Thèses | Bibliothèque Laboratoire Magmas et Volcans | Accès Intranet (Parcourir l'étagère(Ouvrir ci-dessous)) | Disponible | fichier pdf |
Pdf accessible en ligne aux membres de l'OPGC/LMV/LAMP
Lastarria volcano (Chile) is located at the North-West margin of the ‘Lazufre’ ground inflation signal (37x45 km²), constantly uplifting at a rate of ~2.5 cm/year since 1996 (Pritchard and Simons 2002; Froger et al. 2007). The Lastarria volcano has the double interest to be superimposed on a second, smaller-scale inflation signal and to be the only degassing area of the Lazufre signal. In this project, we compared daily SO2 burdens recorded by AURA’s OMI mission for 2005-2010 with Ground Surface Displacements (GSD) calculated from the Advanced Synthetic Aperture Radar (ASAR) images for 2003–2010.
We found a constant maximum displacement rate of 2.44 cm/year for the period 2003-2007 and 0.80- 0.95 cm/year for the period 2007-2010. Total SO2 emitted is 67.0 kT for the period 2005-2010, but detection of weak SO2 degassing signals in the Andes remains challenging owing to increased noise in the South Atlantic radiation Anomaly region.
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