A5068945655- earthquake and tectonic studies
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Seismic Imaging and Inversion Techniques
- Historical Gender and Feminism Studies
- Underwater Acoustics Research
- Race, History, and American Society
- Geotourism and Geoheritage Conservation
- Drilling and Well Engineering
- Earthquake Detection and Analysis
- Cryospheric studies and observations
- Central European and Russian historical studies
- Seismic Waves and Analysis
- Groundwater and Watershed Analysis
- Diaspora, migration, transnational identity
- Gender, Feminism, and Media
- Human Mobility and Location-Based Analysis
- Seismology and Earthquake Studies
- Geological and Geophysical Studies Worldwide
- Climate Change Communication and Perception
- Gender, Security, and Conflict
- French Historical and Cultural Studies
- Historical Geography and Cartography
- Landslides and related hazards
- Geological formations and processes
University of Illinois Urbana-Champaign
2022-2024
University of Exeter
2019-2022
Abstract Inelastic rheological behavior, such as viscoelasticity, is increasingly utilized in the modeling of volcanic ground deformation, elevated thermal regimes induced by magmatic systems may necessitate use a mechanical model containing component time‐dependent viscous behavior. For given amplitude and footprint incorporating viscoelastic regime has been shown to reduce magma reservoir overpressure requirements suggested elastic models. This phenomenon, however, restricted...
Abstract Volcanoes undergoing unrest often produce displacements at the ground surface, providing an important window to interpret dynamics of underlying magmatic system. The thermomechanical properties surrounding host rock are expected be highly heterogeneous, with key physical parameters having a strong dependence on temperature. Deformation models that incorporate nonelastic rheological behaviors therefore heavily reliant assumed thermal conditions, and so it is critical understand how...
Abstract As volcanoes undergo unrest, understanding the conditions and timescales required for magma reservoir failure, links to geodetic observations, are critical when evaluating potential migration surface eruption. Inferring dynamics of a pressurized magmatic system from episodes deformation is heavily reliant on assumed crustal rheology, typically represented by an elastic medium. Here, we use Finite Element models identify rheological response pressurization within...
Abstract. Protecting lives and livelihoods during volcanic eruptions is the key challenge in volcanology, conducted primarily by volcano monitoring emergency management organizations, but complicated scarce knowledge of how communities respond times crisis. Social sensing a rapidly developing practice that can be adapted for volcanology. Here we use social Twitter posts to track changes action reaction throughout 2018 eruption Kīlauea, Hawai'i. The volume relevant tweets explodes early May,...
Abstract Dome-building volcanoes, where long-term eruptive episodes can be interspersed with periods of intra-eruptive repose, are particularly challenging for volcanic hazard assessment. Defining the end is vitally important socioeconomic recovery affected communities but highly problematic due to potential rapid transition from prolonged, seemingly low-risk repose dangerous effusive or explosive activity. It currently unclear what constitutes and an episode. We show that analysis surface...
Geodetic observations are key for assessing the unrest status of volcanoes worldwide, providing critical information about magmatic systems and potential magma migration eruption. Analysing these signals relies on a robust data-model framework. One such approach is Ensemble Kalman Filter (EnKF), data assimilation method that has been adapted analyses volcanic deformation. The EnKF sequentially assimilates inverts geodetic observations, using series model states to ‘nudge’...
Studying the interactions between magmatic and volcano-tectonic processes is critical to understanding behavior of volcanic systems triggering eruptions. Sierra Negra Volcano, Galápagos one largest basaltic calderas on Earth, its latest eruption in 2018 marked first time an was recorded by both GNSS seismic networks. These unprecedented data sets provide a unique opportunity investigate dynamics test hypotheses for dike initiation migration. Observational modeling studies...
<p>Episodes of ground deformation, relating to the unrest a volcanic system, are often readily identifiable within geodetic timeseries (e.g. GPS, InSAR). However, underlying processes facilitating this deformation more enigmatic. By modelling observed signals, ultimate aim is infer characteristics deforming reservoir; namely size and time-dependent evolution system and, potentially, fluxes magma involved. These parameters can be estimated using simple elastic models, but...
High-resolution bathymetry surveys provide an opportunity to analyse local geological structure where onshore areas afford limited exposure. Semi-automated lineament detection methods are necessary for of large coverage a manual analysis would be subjective and time-consuming. However, semi-automated approaches dependent on effective feature extraction identify genuine lineaments. This study offers solutions common problems that can impede processing sharp steps in the seafloor (e.g....
<p>As volcanic systems undergo unrest, understanding the conditions required for reservoir failure, associated timescales, and links to geophysical observations are critical when evaluating potential eruption. The characteristics dynamics of a pressurised magmatic system can be inferred from episodes surface deformation, but this process is heavily reliant on assumed crustal rheology. In regions, shallow or long-lived significantly perturb regional geothermal gradient, altering...
<p>Soufrière Hills Volcano (SHV) is an andesitic dome-building volcano on the island of Montserrat (British West Indies). SHV began its current, and anomalously long, eruption in 1995, but eruptive activity has been intermittent with phases lava extrusion separated by periods relative quiescence. The current pause started February 2010 longest yet recorded, 10 years 11 months at time writing (January 2021). Continuous GPS measurements show island-wide inflation...
Dome-building volcanoes are particularly challenging for volcanic hazard assessment, where long-term eruptive episodes can be interspersed with periods of intra-eruptive repose. Defining the end is vitally important socio-economic recovery affected communities, but highly problematic due to potential prolonged, seemingly low-risk, repose rapidly transition dangerous effusive or explosive activity. It currently unclear what constitutes and an episode. Here we show that analysis surface...