Unrest at the Laguna del Maule volcanic field 2005–2020: renewed acceleration of deformation
| Autor: | Kurt L. Feigl, Loreto Córdova, C. Cardona, H. Le Mével |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
geography
geography.geographical_feature_category 010504 meteorology & atmospheric sciences Crust Volcanology Deformation (meteorology) Unrest 010502 geochemistry & geophysics 01 natural sciences Volcano Geochemistry and Petrology Interferometric synthetic aperture radar Magma Sedimentology Seismology Geology 0105 earth and related environmental sciences |
| Zdroj: | Bulletin of Volcanology. 83 |
| ISSN: | 1432-0819 0258-8900 |
| Popis: | The Laguna del Maule volcanic field in Chile has been exhibiting unrest since 2005. New GPS and InSAR data reveal a second episode of accelerated deformation beginning in late 2016 and continuing through May 2020, with an uplift rate > 290 mm/year between 2019 and 2020. To explain the spatial and temporal pattern of deformation, we apply a dynamic model of viscous magma flowing through a conduit into a fluid-filled reservoir surrounded by a heterogeneous, viscoelastic crust. A Monte Carlo procedure optimizes the ellipsoid reservoir geometry and the inlet pressure history. The two episodes of accelerating uplift are each modeled with a pressure increase rate of $\sim $ ∼ 9 MPa/year. Since 2016, 0.10 km3 of magma was injected into the system for a total of 0.37 km3 since 2005. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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