A5008565048- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Geological and Tectonic Studies in Latin America
- High-pressure geophysics and materials
- Geological and Geophysical Studies
- Landslides and related hazards
- Earthquake Detection and Analysis
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Meat and Animal Product Quality
- Probiotics and Fermented Foods
- Geochemistry and Geologic Mapping
- Protein Hydrolysis and Bioactive Peptides
- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Seismology and Earthquake Studies
- Inertial Sensor and Navigation
- Spacecraft Design and Technology
- Business Process Modeling and Analysis
- Astronomical Observations and Instrumentation
- Geophysics and Gravity Measurements
- Adaptive optics and wavefront sensing
- Methane Hydrates and Related Phenomena
- Employment, Labor, and Gender Studies
- Meteorological Phenomena and Simulations
- Wireless Power Transfer Systems
University of Chile
2015-2024
Cornell University
2014-2022
Institut de physique du globe de Paris
2018-2022
Université Paris Cité
2019-2022
Centre National de la Recherche Scientifique
2019-2022
University of Nevada, Reno
2022
Rice University
2022
Universidad de Sevilla
2009-2020
Universities Space Research Association
2014-2019
Sorbonne Paris Cité
2019
Abstract Volcanoes are hazardous to local and global populations, but only a fraction continuously monitored by ground‐based sensors. For example, in Latin America, more than 60% of Holocene volcanoes unmonitored, meaning long‐term multiparameter data sets volcanic activity rare sparse. We use satellite observations degassing, thermal anomalies, surface deformation spanning 17 years at 47 the most active America compare these archived Global Volcanism Program. This first comparison...
Within Latin America, about 319 volcanoes have been active in the Holocene, but 202 of these no seismic, deformation or gas monitoring. Following 2012 Santorini Report on satellite Earth Observation and Geohazards, Committee Satellites (CEOS) developed a 4-year pilot project (2013-2017) to demonstrate how observations can be used monitor large numbers cost-effectively, particularly areas with scarce instrumentation and/or difficult access. The aims improve disaster risk management (DRM) by...
As our ability to detect volcanic unrest improves, we are increasingly confronted with the question of whether has a magmatic origin (magma on move) or non-magmatic from change in hydrothermal system (fluids that not magma tectonic processes. The cause critical implications for potential eruptive hazard (e.g. used constructing Bayesian Event Trees), but is frequently subject debate, even at well-studied systems. Here, propose set multi-disciplinary observations and numerical models could be...
Abstract The 2018 Sierra Negra eruption resulted in meter‐scale subsidence due to basaltic magma extraction from a deflating reservoir. was also characterized by dike intrusions, >4 M W earthquakes, and sulfur dioxide emissions. We use combination of Interferometric Synthetic Aperture Radar, Digital Elevation Model, Global Positioning System seismic data assess conditions required trigger episodic caldera collapse at Negra. effusive mainly sourced horizontal sill located ∼2 km depth, with...
Abstract Anticipating volcanic eruptions remains a challenge despite significant scientific advancements, leading to substantial human and economic losses. Traditional approaches, like volcano alert levels, provide current states but do not always include eruption forecasts. Machine learning (ML) emerges as promising tool for forecasting, offering data-driven insights. We propose an ML pipeline using volcano-seismic data, integrating precursor extraction, classification modeling,...
The Nevados de Chillán volcanic complex, located in the Southern Volcanic Zone of Andes, is one most active volcanoes Chile. Its recent eruptive cycle began 2016 and lasted seven years until January 2023, with a explosivity index (VEI) level 2. This sequence best instrumentally recorded eruption Chile to date, encompassing small vulcanian eruptions, formation new crater (called Nicanor), dome growth collapse, effusion lava flows, seismic activity characterized primarily by...
Abstract Eruptive activity shapes volcanic edifices. The formation of broad caldera depressions is often associated with major collapse events, emplacing conspicuous pyroclastic deposits. However, subsidence may also proceed silently by magma withdrawal at depth, more difficult to detect. Ambrym, a basaltic island, hosts 12-km wide and several intensely-degassing lava lakes confined intra-caldera cones. Using satellite remote sensing deformation, gas emissions thermal anomalies, combined...
This paper describes the design, fabrication, simulation, and experimental results of an improved miniaturized two-axis sun sensor for industrial applications, created by adapting a technology used previously in satellite applications. The each axis is composed six photodiodes integrated crystalline-silicon substrate layer cover glass, which to protect silicon hold windows. high precision obtained subdivision field view, ±60°, with resolution 0.1°. Each region controlled independent...
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...
Abstract Two distinct types of rare crystal-rich mafic enclaves have been identified in the rhyolite lava flow from 2011–12 Cordón Caulle eruption (Southern Andean Volcanic Zone, SVZ). The majority are coarsely crystalline with interlocking olivine-clinopyroxene-plagioclase textures and irregular shaped vesicles filling crystal framework. These interpreted as pieces magma mush underlying a crystal-poor rhyolitic body that has fed recent silicic eruptions at Caulle. A second type porphyritic...
TerraSAR-X (TSX), TanDEM-X (TDX), and PAZ Synthetic Aperture Radar data have been used at over 120 volcanoes to assess surface characteristics change time. We examine previous work, adding additional examples understand where when these are most useful for volcanology. focus on as part of the Committee Earth Observation Satellites (CEOS) Volcano Demonstrator Project. TSX/TDX/PAZ provide a valuable means detecting small changes from amplitude images topographic bistatic TSX/TDX data. For...
The 2011–2012 eruption at Cordón Caulle, Chile offers an exceptional opportunity to investigate topographic evolution of a laccolith, lava flows, and tephra during after rhyolitic eruptions using satellite TanDEM-X Plèiades data. We find distinct phases: rapid surface uplift from the laccolith (June–August 2011) (June 2011–March 2012), followed by reduction in elevation (up 19 m yr−1) until February 2013, slower subsidence all deposits 2019 (the most recent data). spatial distribution...
Abstract We present evidence of volcano‐tectonic interactions at Sabancaya volcano that we relate to episodic magma injection and high regional fluid pore pressures. a surface deformation time series including observations from ERS‐1/2, Envisat, Sentinel‐1, COSMO‐SkyMed, TerraSAR‐X spans June 1992 February 2019. These data show deep‐seated inflation northwest 1992–1997 2013–2019, as well creep rupture on multiple faults. Afterslip the Mojopampa fault following 2013 M W 5.9 earthquake is...
Abstract We use interferometric synthetic aperture radar (InSAR) and local seismic data to investigate the cause of earthquake sequences near Sabancaya volcano in southern Peru from 2002 2014, with a particular focus on events leading up August 2014 phreatic eruption. InSAR‐observed deformation associated swarms late 2002, February 2013, July 2013 is modeled by fault slip, no need for magmatic sources explain deformation. The majority seismicity an expression regional tectonic system, which...
Summary Free fatty acids (FFA) and lipid protein oxidation changes during ripening were studied in Torta del Casar cheese. This cheese with protected designation of origin (PDO) is made from raw ewe milk uses vegetable rennet. Cheeses analysed at four different stages 1, 30, 60 90 days. Most FFA significantly increased throughout maturation, except valeric margaric acids. Acetic acid content was the most abundant end ripening. Short chain (SCFA) showed an important increase especially...
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...