| Titre | Deep source model for Nevado del Ruiz Volcano, Colombia, constrained by interferometric synthetic aperture radar observations |
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| Auteur | Lundgren, P; Samsonov, S V ; Lopez Velez, C M; Ordonez, M |
| Source | Geophysical Research Letters vol. 42, 2015 p. 4816-4823, https://doi.org/10.1002/2015GL063858  Accès ouvert |
| Image |  |
| Année | 2015 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20170203 |
| Éditeur | Wiley-Blackwell |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1002/2015GL063858 |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Région | Nevado del Ruiz; Andes |
| Lat/Long OENS | -75.5000 -75.1667 5.0000 4.5500 |
| Sujets | caractéristiques volcaniques; volcans; déformation; télédétection; imagerie radar; filons-couches; filons rocheux |
| Illustrations | images satellitaires; cartes de localisation; graphiques; histogrammes |
| Diffusé | 2015 06 24 |
| Résumé | (disponible en anglais seulement)
Nevado del Ruiz is part of a large volcano complex in the northern Andes of Colombia. Interferometric synthetic aperture radar observations from the RADARSAT-2
satellite since 2011 show steady inflation of the volcano since 2012 at 3–4?cm/yr. The broad (>20?km) deformation pattern from both ascending and descending track data constrain source models for either point or spheroidal sources, both located at
>14?km beneath the surface (mean elevation 4.2?km) and 10?km SW of Nevado del Ruiz, below nearby Santa Isabel Volcano. Stress change computations for both sources in the context of a compressive regional stress indicate that dikes propagating from
the source should become trapped in sills, possibly leading to a more complex pathway to the surface and explaining the significant lateral separation of the source and Nevado del Ruiz Volcano. |
| GEOSCAN ID | 305973 |
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