A5009053860- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Geological and Tectonic Studies in Latin America
- Landslides and related hazards
- High-pressure geophysics and materials
- Cryospheric studies and observations
- Geomagnetism and Paleomagnetism Studies
- Geological and Geophysical Studies
- Earthquake Detection and Analysis
- Geophysics and Gravity Measurements
- Geological and Geophysical Studies Worldwide
- Seismology and Earthquake Studies
- Geology and Paleoclimatology Research
- Geological Modeling and Analysis
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Geophysical and Geoelectrical Methods
Chilean Air Force
2021
University of Chile
2013
Explosive eruptions of large-volume rhyolitic magma systems are common in the geologic record and pose a major potential threat to society. Unlike other natural hazards, such as earthquakes tsunamis, large volcano may provide warning signs long before caldera-forming eruption occurs. Yet, these signs—and what they imply about magma-crust dynamics—are not well known. This is because we have learned how form, grow, erupt mainly from study ash flow tuffs deposited tens hundreds thousands years...
The Laguna del Maule (LdM) volcanic field in Chile is an exceptional example of postglacial rhyolitic volcanism the Southern Volcanic Zone Andes. By interferometric analysis synthetic aperture radar (SAR) images acquired between 2007 and 2012, we measure exceptionally rapid deformation. maximum vertical velocity exceeds 280 mm yr–1. Although rate deformation was negligible from 2003 January to 2004 February, it accelerated some time before January. Statistical testing rejects, with 95 per...
Abstract The Laguna del Maule (LdM) volcanic field in the southern zone of Chilean Andes exhibits a large volume rhyolitic material erupted during postglacial times (20–2 ka). Since 2007, LdM has experienced an unrest episode characterized by high rates deformation. Analysis new GPS and Interferometric Synthetic Aperture Radar (InSAR) data reveals uplift greater than 190 mm/yr between January 2013 November 2014. geodetic are modeled as inflating sill at depth. results used to calculate...
A warped paleoshoreline records 10,000 years of magma-driven surface deformation above an active rhyolite-producing reservoir.
Abstract Cordón Caulle is a large fissural volcano that has erupted rhyodacitic magma of the same composition in its past three historical eruptions 1921, 1960, and 2011–2012. There was significant ground deformation observed before during 2011–2012 eruption—here we use C X band interferometric synthetic aperture radar (InSAR) time series results to document posteruptive uplift up 0.8 m between March 2012 May 2015, with line‐of‐sight rates 45 cm/yr have been largely aseismic, along...
In this paper we show the results of a paleomagnetic study carried out along western Andes central Chile from 30° to 36°S. Whereas analysis Jurassic Late Cretaceous rocks in Pampean flat slab segment shows small or non significant clockwise vertical-axis rotations, obtained to Neogeone south, on normal subduction segment, sistematically rotations up 40º. Paleomagnetic are coeval with thrusting High Miocene times. We propose coupled Bolivian...
Abstract 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 late 2016 continuing through May 2020, with an uplift rate > 290 mm/year between 2019 2020. To explain the spatial temporal pattern deformation, we apply dynamic model viscous magma flowing conduit into fluid-filled reservoir surrounded by heterogeneous, viscoelastic crust. A Monte Carlo procedure optimizes...
Abstract The VEI 4 rhyolitic eruption of Cordón Caulle volcano in 2011–2012 was immediately followed by ∼0.77 m exponentially decaying uplift during 2012–2015. In this study, we present evidence additional transient pulses inflation with interferometric synthetic aperture radar (InSAR) time series 2016–2018. We also assess whether the 2012–2015 can be explained viscoelastic relaxation or not. InSAR detected ∼12 cm 2016–2017 and ∼5 2017–2018. three episodes have very similar spatial scales...