A5007823983- earthquake and tectonic studies
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Seismology and Earthquake Studies
- Geochemistry and Geologic Mapping
- Seismic Waves and Analysis
- Geological and Tectonic Studies in Latin America
- CO2 Sequestration and Geologic Interactions
- Earthquake Detection and Analysis
- Hydrocarbon exploration and reservoir analysis
- Seismic Imaging and Inversion Techniques
- Geological and Geophysical Studies Worldwide
- Geology and Paleoclimatology Research
- Building materials and conservation
- Granular flow and fluidized beds
- Geophysics and Gravity Measurements
- Digital Communication and Language
- Mineral Processing and Grinding
- Geological Modeling and Analysis
- Environmental and Cultural Studies in Latin America and Beyond
- GNSS positioning and interference
- Geotechnical and Geomechanical Engineering
- Dynamics and Control of Mechanical Systems
- Structural Health Monitoring Techniques
- Landslides and related hazards
University College London
2013-2024
Instituto Geofísico de la Escuela Politécnica Nacional
2016-2024
Rheological variations have been postulated as the cause of transitions from effusive to explosive volcanic eruption style. Rheology is integrally linked composition and textural state (porosity, crystallinity) magma well stress, temperature strain rate operative during flow. This study characterises rheological behaviour and, importantly, evolution physical properties two magmas (with different crystallinity porosity) Volcán de Colima (Mexico) — a system known for its rapid fluctuations in...
The ability of volatiles to escape rising magma regulates the explosivity a volcanic system. During silicic lava dome eruptions, strain localization at conduit margin occurs during ascent, creating damage halo with implications for gas escape. Here we report first systematic study permeability network anisotropy across marginal shear zone A.D. 2004–2008 Mount St. Helens (Washington State, USA). results show increasingly large as much four orders magnitude (over ∼4 m) moving from interior...
As magma ascends to shallow levels in the volcanic conduit, volatile exsolution can produce a dramatic increase crystal content of magma. During extrusion, low porosity, highly crystalline magmas are subjected thermal stresses which generate permeable microfracture networks. How these networks evolve and respond changing temperature has significant implications for gas escape hence volcano explosivity. Here, we report first laboratory experimental study on effect permeability lava dome rocks...
Abstract. Lava dome eruptions subjected to high extrusion rates commonly evolve from endogenous exogenous growth and limits their structural stability hold catastrophic potential as explosive eruption triggers. In the conduit, strain localisation in magma, accompanied by seismogenic failure, marks onset of brittle magma ascent dynamics. The rock record structures preserves vestiges cataclastic processes thermal anomalies, key unravelling subsurface processes. Here, a combined structural,...
Abstract Accelerating rates of quasiperiodic “drumbeat” long‐period earthquakes (LPs) are commonly reported before eruptions at andesite and dacite volcanoes, promise insights into the nature fundamental preeruptive processes improved eruption forecasts. Here we apply a new Bayesian Markov chain Monte Carlo gamma point process methodology to investigate an exceptionally well‐developed sequence drumbeat LPs preceding recent large vulcanian explosion Tungurahua volcano, Ecuador. For more than...
On 2 December, 2021 we recorded a sequence of drumbeat seismic events at Sangay volcano. This lasted several hours and resulted in two explosive emissions whose eruptive columns reached 9 km above crater. Unexpectedly, these explosions did not produce any ash fallout the inhabited areas around was produced after series morphological changes, including opening new vents (W N) landslide. These occurred during an enhanced period ground deformation degassing. Further analysis satellite images...
Shifts in activity at long-active, open-vent volcanoes are difficult to forecast because precursory signals enigmatic and can be lost amongst daily activity. Here, we propose that crater vent morphologies, along with summit height, help us bring some insights into future one of Ecuador’s most active El Reventador. On 3 November 2002, Reventador volcano experienced the largest eruption Ecuador last 140 years has been continuously ever since transitions between coexistence explosive effusive...
A research team from Ecuador’s Geophysical Institute keeps a close eye on an unusually active and unstable volcano in the nation’s remote jungles.
Determining the lithology, extent, origin, and age of hummocks can be challenging, especially if these are covered by successive deposits lush vegetation. At Chalupas caldera, a late-Pleistocene silicic center that lies astride Eastern Cordillera northern Ecuador, we have tried to overcome difficulties combining geological observations sampling, laboratory analysis (geochemistry, scanning electron microscope radiometric dating) remote sensing techniques. is second largest caldera in Northern...
Abstract The physiochemical properties of volcanic ash are determined by magma ascent and eruption dynamics provide important insights into controls on the timing style eruptions. However, linking petrological observations to monitoring parameters remains challenging. Here we investigate relationships between geophysical, geochemical satellite remote sensing data with better understand eruptive at El Reventador volcano, Ecuador. Between 2016 2019, activity was characterised frequent...
Emoji are vastly becoming an integral part of everyday communication, yet little is understood about the extent to which these processed emotionally. Previous research shows that there a processing advantage for emotionally-valenced words over neutral ones, therefore if emoji indeed emotional, one could expect equivalent advantage. In Pilot Study, participants (N = 44) completed lexical decision task ascertain accuracy and response latency word, face stimuli. This stimuli varied in emotional...