A5024657014- earthquake and tectonic studies
- Methane Hydrates and Related Phenomena
- Geological and Geochemical Analysis
- Geophysics and Gravity Measurements
- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- High-pressure geophysics and materials
- Geological and Geophysical Studies
- Geomagnetism and Paleomagnetism Studies
- Seismic Waves and Analysis
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Landslides and related hazards
- Earthquake Detection and Analysis
- Geological formations and processes
- Geochemistry and Geologic Mapping
- Seismic Imaging and Inversion Techniques
- Statistical and numerical algorithms
- Seismology and Earthquake Studies
- Geological Formations and Processes Exploration
- Geological Modeling and Analysis
- Science and Climate Studies
- Hepatitis C virus research
- Geophysical and Geoelectrical Methods
- Reservoir Engineering and Simulation Methods
- Geological and Geophysical Studies Worldwide
IdMind (Portugal)
2024
Instituto Dom Luiz
2022-2024
University of Lisbon
2020-2023
University of Beira Interior
2017-2023
University of Iceland
2014-2020
Université Paris Cité
2018
Institut de physique du globe de Paris
2016-2018
Nordic Cancer Union
2016
Laboratoire Magmas et Volcans
2011-2015
Centre National de la Recherche Scientifique
2011-2015
Large volcanic eruptions on Earth commonly occur with a collapse of the roof crustal magma reservoir, forming caldera. Only few such collapses per century, and lack detailed observations has obscured insight into mechanical interplay between eruption. We use multiparameter geophysical geochemical data to show that 110-square-kilometer 65-meter-deep Bárdarbunga caldera in 2014-2015 was initiated through withdrawal magma, lateral migration 48-kilometers-long dike, from 12-kilometers deep...
Abstract Large volume effusive eruptions with relatively minor observed precursory signals are at odds widely used models to interpret volcano deformation. Here we propose a new modelling framework that resolves this discrepancy by accounting for magma buoyancy, viscoelastic crustal properties, and sustained channels. At low accumulation rates, the stability of deep bodies is governed magma-host rock density contrast body thickness. During eruptions, inelastic processes including mush...
The 2014–2015 Bárðarbunga fissure eruption at Holuhraun in central Iceland was distinguished by the high emission of gases, total 9.6 Mt SO2, with almost no tephra. This work collates all ground-based measurements this extraordinary cloud made under particularly challenging conditions: remote location, optically dense SO2 column amounts, low UV intensity, frequent clouds and precipitation, an extensive hot lava field, developing ramparts, high-latitude winter conditions. Semi-continuous flux...
Ultra-deep sequencing (UDS) of amplicons is a major application for next-generation tech nologies, even more so the 454 Genome Sequencer FLX. Especially this application, errors that might be introduced during any sample processing or data analysis steps should avoided at least recognized, as they lead to aberrant sequence variant calling. Since pyrosequencing relies on PCR-driven target amplification, it key differentiate amplification step from genuine minority variants. Thereto, optimal...
ABSTRACT Known human immunodeficiency virus (HIV) transmission histories are invaluable models for investigating the evolutionary and dynamics of to assess accuracy phylogenetic reconstructions. Here we have characterized an HIV-1 chain consisting nine infected patients, almost all whom were treated with antiviral drugs at later stages infection. Partial pol env gp41 regions HIV genome directly sequenced from plasma viral RNA least one sample each patient. Phylogenetic analyses in using...
Abstract Lava flows contract as they cool, causing progressive subsidence of the flow surface. Here we study this process by measuring and modeling deformation emplaced lava surrounding substrate. The temporal trend vertical movements was investigated using interferometric analysis synthetic aperture radar (InSAR) images from 1991 2000 Hekla eruptions, covering periods 23 12 years, respectively. Data six tracks three satellites, including both ascending descending passes, were used to create...
We report how data from satellite and aerial synthetic aperture radar (SAR) observations were integrated into monitoring of the 2014-2015 Holuhraun eruption in Bárðarbunga volcanic system, largest effusive Iceland since 1783-84 Laki eruption. A lava field formed one most remote areas Iceland, after propagation a ~50 km-long dyke beneath Vatnajökull ice cap, where caldera is located. Due to 6 month duration eruption, mainly wintertime, daily was particularly challenging. During European...
Volcano dynamics results from an interplay between internal and external processes spanning different time scales. Unravelling how such interact may provide key insights into the mechanisms that lead to destabilization of volcanoes eruption, a critical information forecast hazards. Studies dealing with tidal influence on fall within this context, yet cause-effect relationship tides eruptions is still poorly understood. In present study, we investigate two nearby volcanoes, Ischia Campi...
The rifting episode that occurred in Dabbahu–Manda–Hararo (Ethiopia) between 2005 and 2010 during which 14 dyke intrusions were emitted, was a unique opportunity to study interactions tectonic deformation magmatic processes. While magmatism has been shown control primarily the spatial temporal distribution of this accretion sequence, role faults accommodating plate spreading rift segments is poorly understood. During interdyking periods, transient ground due magma movement generally...
Abstract Background: Hepatitis C virus (HCV) genotyping and accurate subtype determination is becoming increasingly important to better understand viral evolution, the development of resistance STAT-C, possibly even for treatment management chronic HCV-infected patients. Methods: A subtyping assay based on a 329-bp sequence NS5B region, together with an automated interpretation tool was developed. Clinical samples six major genotypes were used assess performance characteristics. Results: The...
The decryption of the temporal sequence volcanic eruptions is a key step in better anticipating future events. Volcanic activity result complex interaction between internal and external processes, with time scales spanning multiple orders magnitude. We review periodicities that have been detected or correlated eruptions/phenomena interpreted as resulting from forces. Taking global perspective longer than few years, we approach this by analyzing three series using singular spectral analysis:...
Abstract A 3 day exercise simulating unrest and a large explosive eruption at Katla volcano, Iceland, was conducted in January 2016. volume of simulated data based on complex, but realistic scenario compiled advance then transmitted to participants near-real time over the course exercise. The designed test expertise procedures local institutions charge warning responding volcanic hazards, namely volcano observatory, national civil protection, university-science sector, as well their...
Studying a large number of volcanic eruptions is way to decipher general characteristics related volcano dynamics but also on external forcing influencing it, such as solid Earth and ocean tides. Many studies have tackled this tidal influence the onset more generally, activity. However, interplay between quasi-permanent systems still poorly understood. With present study, we propose consider global viewpoint address interaction. We analyzed monthly mean sea level 1880 2009 using Singular...
Abstract Analyses of fault attributes have contributed to unraveling growth processes in diverse tectonic settings. By integrating such analysis at the scale a population, we propose investigate characteristics rift that has evolved up stage typical continent‐ocean transition. We address this problem by considering Dabbahu‐Manda‐Hararo (DMH) segment (Central Afar, Ethiopia), recognized for being late rifting stage. quantify azimuth, length, and throw 668 normal faults. Along DMH rift, mean...