A5027459691- Earthquake Detection and Analysis
- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Geochemistry and Geologic Mapping
- Seismology and Earthquake Studies
- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Geological and Tectonic Studies in Latin America
- Air Quality Monitoring and Forecasting
- Seismic Waves and Analysis
- Reservoir Engineering and Simulation Methods
- Atmospheric chemistry and aerosols
- Groundwater and Isotope Geochemistry
- Hydrocarbon exploration and reservoir analysis
- Radiation Detection and Scintillator Technologies
- Hydraulic Fracturing and Reservoir Analysis
- Landslides and related hazards
- Geology and Paleoclimatology Research
- Climate variability and models
- Geochemistry and Elemental Analysis
Universidad Católica del Norte
2016-2024
University of Antofagasta
2024
Research Center for Integrated Disaster Risk Management
2020-2023
Millennium Science Initiative
2022-2023
University of Sheffield
2019
A multidisciplinary study that includes processing of Landsat ETM+ satellite images, chemistry gas condensed, mineralogy and fumarolic deposits, fluid inclusion data from native sulphur has been carried out in the Lastarria Volcanic Complex (LVC) with objective to determine distribution characteristics hydrothermal alteration zones establish relations between deposits. Satellite image shows presence four zones, characterized by a mineral assemblage constituted mainly clay minerals, alunite,...
One of the major problems in volcanic surveillance is how data from several techniques can be correlated and used to discriminate between possible precursors eruptions changes related non-eruptive processes. Gas chemical surveys measurements SO 2 emission rates performed past (2006–2019) at Lastarria volcano Northern Chile have revealed a persistent increment magmatic sourced gas emissions since late November 2012, following 13 years period intense ground uplift. In this work, we provide new...
The practice of monitoring active volcanoes, includes several techniques using either direct or remote measurements, the latter being more important for volcanoes with limited accessibility. We present Volcanic Anomalies Monitoring System (VOLCANOMS), a new, online, low-cost and semiautomatic system based on Landsat imagery. This can detect permanent and/or temporal thermal anomalies in near-infrared (NIR), short-wave infrared (SWIR), (TIR) bands. VOLCANOMS allows researchers to calculate...
We used low-cost Raspberry Pi ultraviolet (UV) cameras to measure sulphur dioxide (SO2) fluxes from Sabancaya volcano, Peru, during eruptive activity on 27 April 2018. Light dilution corrections were made by operating instruments at two distances simultaneously. Estimated SO2 of 27.1 kgs-1 are higher than previously reported, likely due the current episode (ongoing since November 2016). Each event included frequent (2–3 per minute), ash-rich emissions, forming gas pulses with masses 3.0–8.2...
Molten sulfur is found in various subaerial volcanoes. However, limited records of the pools and flows molten have been reported: therefore, questions remain regarding physicochemical processes behind this phenomenon. A suite new flows, some which active, was identified at Lastarria volcano (northern Chile) studied using satellite imagery, situ probing, temperature video recording. This finding provides a unique opportunity to better understand emplacement mechanisms mineral chemical...
UV cameras have been used for over a decade in order to remotely sense SO2 emission rates from active volcanoes, and thereby enhance our understanding of processes related passive degassing. Whilst column density retrievals can be more accurate/sophisticated using alternative techniques (e.g., Differential Optical Absorption Spectrometer (DOAS), Correlation (COSPEC)), due their higher spectral resolutions, provide the advantage high time-resolution rates, much greater spatial resolution,...
Abstract. This study was aimed to build a multi-station automatic classification system for volcanic seismic signatures such as hybrid, long period, tremor, tectonic, and volcano–tectonic events. based on probabilistic model made using transfer learning, which has, the main tool, pre-trained convolutional network named AlexNet. We designed five experiments different datasets with data that were real, synthetic, two combinations of these (combined 1 combined 2), balanced subset without...
Since its introduction to volcanology in the mid-2000 s, SO 2 camera has become an important instrument for acquisition of accurate and high time-resolution emission rates, aiding hazard assessment volcanological research. However, with exception a few locations (Stromboli, Etna, Kīlauea), hitherto majority measurements have been made on discrete field campaigns, which provide only brief snapshots into volcano’s activity. Here, we present development new, low-cost, low-power permanent...
Details of ongoing changes in geomorphology and structure nested volcanic craters are lacking due to the difficult hazardous access. In this study, we present a novel unoccupied aircraft system (UAS) dataset collected at Lascar, northern Chile, one most active volcanoes Central Volcanic Zone Andes. Lascar features craters, deepest crater which has experienced repeated lava dome emplacement numerous violent explosions recent decades. We performed UAS surveys 2017 2020 collect optical thermal...
One of the major challenges in understanding crater lakes dynamics and their connection with magmatic/hydrothermal processes is continuous tracking physical behavior lakes, especially cases remote poorly accessible volcanoes. Peteroa volcano (Chile–Argentina border) part Planchón–Peteroa–Azufre Volcanic Complex, one three volcanoes Southern Zone Andes lakes. formed by a ∼5 km diameter caldera-type crater, which hosts four several fumarolic fields. has large history eruptive activity...
Research Article| August 02, 2024 Early Publication Preface to the Focus Section on Volcano Monitoring in Americas Alicia J. Hotovec‐Ellis; Hotovec‐Ellis * 1U.S. Geological Survey, California Observatory, Moffett Field, California, U.S.A. *Corresponding author: [email protected] https://orcid.org/0000-0003-1917-0205 Search for other works by this author on: GSW Google Scholar Ricardo Garza‐Girón; Garza‐Girón 2Department of Geosciences, Warner College Natural Resources, Colorado State...
Ultraviolet (UV) cameras provide advantages in spatial and temporal resolution for the measurement of sulphur dioxide (SO2) emission rates, when compared to more common differential optical absorption spectroscopy (DOAS) instruments. Up this point, however, most instances UV camera usage are restricted discrete campaigns, rather than permanent installations. Notable exceptions include Stromboli, Etna, Kīlauea (2013-2018). The reasons largely related cost, with commercially available...
Instruments which are designed to measure multiple gases widely used across several industries with a common focus on environmental gas sampling. Reliable instrumentation and sensors therefore vital for the monitoring of air quality in cities more challenging scenarios, example volcanic release. However, such is commonly expensive can be difficult deploy, meaning that large instrument networks - needed assess spatial differences inhibitive. A bespoke do-it-yourself approach beneficial. Here,...
<ns3:p>At convergent margins, plates collide producing a subduction process. When an oceanic plate collides with continental plate, the denser (i.e., oceanic) subducts beneath less dense (continental) plate. This process results in transportation of carbon and other volatiles into Earth’s deep interior is counterbalanced by volcanic outgassing. Sampling deeply-sourced seeps fumaroles throughout margin allows us to assess processes that control inventory their interaction subsurface microbial...
Abstract. This study was aimed to build a multi-station automatic classification system for volcanic seismic signatures. based on probabilistic model made using transfer learning, which has, as the main tool, pre-trained convolutional network named AlexNet. We designed four experiments different datasets with data that real, artificial, and two combinations of these (combined 1 combined 2). The experiment presented highest scores when process augmentation introduced into processing sequence....