A5076753744- Landslides and related hazards
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Geological and Geophysical Studies
- Cryospheric studies and observations
- Disaster Management and Resilience
- earthquake and tectonic studies
- Flood Risk Assessment and Management
- Geological and Geochemical Analysis
- Geological formations and processes
- Seismic Waves and Analysis
- Geophysics and Gravity Measurements
- Rangeland Management and Livestock Ecology
- Seismology and Earthquake Studies
- Climate Change, Adaptation, Migration
- Satellite Image Processing and Photogrammetry
- Geochemistry and Geologic Mapping
- Tree Root and Stability Studies
- Disaster Response and Management
- Science and Climate Studies
- Seismic Imaging and Inversion Techniques
- African Botany and Ecology Studies
- Geotourism and Geoheritage Conservation
- Geology and Paleoclimatology Research
- Geological Modeling and Analysis
- Fire effects on ecosystems
Royal Museum for Central Africa
2015-2024
Musée National d'Histoire Naturelle
2018
Royal Museums of Art and History
2017
European Center for Geodynamics and Seismology
2016
Institut de physique du globe de Paris
2004
Université de Strasbourg
2004
Space-borne Differential Interferometric Synthetic Aperture Radar (DInSAR) has been extensively used in the last two decades to measure ground surface deformation, providing key information for characterization and understanding of many natural anthropogenic processes. However, conventional DInSAR technique measures only one component deformation (i.e. satellite's line-of-sight (LOS)), causing interpretation measurements be challenging potentially narrowing mechanisms dynamics processes at...
Abstract Classical mechanisms of volcanic eruptions mostly involve pressure buildup and magma ascent towards the surface 1 . Such processes produce geophysical geochemical signals that may be detected interpreted as eruption precursors 1–3 On 22 May 2021, Mount Nyiragongo (Democratic Republic Congo), an open-vent volcano with a persistent lava lake perched within its summit crater, shook up this interpretation by producing approximately six-hour-long flank without apparent precursors,...
On 17 January 2002, Nyiragongo volcano erupted along a 20 km‐long fracture network extending from the to city of Goma. The event was captured by InSAR data ERS‐2 and RADARSAT‐1 satellites. A combination 3D numerical modeling inversions is used analyze these displacements. Using Akaike Information Criteria, we determine that model with two subvertical dikes most likely explanation for 2002 deformation signal. first, shallow dike, 2 km high, associated eruptive fissure, second, deeper 6 high...
Abstract Nyamulagira and Nyiragongo are two of the most active volcanoes in Africa, but their eruptive histories poorly known. Assessing lava flow volumes region remains difficult, as field surveys often impossible available Digital Elevation Models (DEMs) do not have adequate spatial or temporal resolutions. We therefore use TerraSAR‐X add‐on for Measurement (TanDEM‐X) interferometry to produce a series 0.15 arc sec (∼5 m) DEMs from between 2011 2012 over these volcanoes. TanDEM‐X an...
Abstract Nyiragongo is one of the rare volcanoes on Earth hosting a lava lake. However, understanding its plumbing and lake systems remains limited, with, until recently, only sporadic or time‐limited historical observations measurements. Combining dense accurate crater floor level measurements based 1,703 satellite radar images topographic reconstructions using photogrammetry, we obtain first reliable picture time evolution intra‐crater erupted volumes between two last flank eruptions in...
Abstract Accurate precipitation data are fundamental for understanding and mitigating the disastrous effects of many natural hazards in mountainous areas. Floods landslides, particular, potentially deadly events that can be mitigated with advanced warning, but accurate forecasts require timely estimation precipitation, which is problematic regions such as tropical Africa limited gauge measurements. Satellite rainfall estimates (SREs) great value areas, rigorous validation required to...
Landslides can lead to high impacts in less developed countries, particularly tropical environments where a combination of intense rainfall, active tectonics, steep topography, and population density be found. However, the processes controlling landslide initiation their evolution through time remains poorly understood. Here we show relevance use multi-temporal differential radar interferometric (DInSAR) technique characterise ground deformations associated with landslides rapidly-expanding...
Goma city, at the eastern border of DRCongo, is highly exposed to natural hazards, especially from Nyiragongo volcano, located directly North it. In January 2002, city centre was devastated by lava flows and several thousands people were temporarily displaced. Defining quantifying population vulnerability flow hazards in particular, a crucial element evaluate manage risk. This paper aims assessing facing volcanic Goma, its spatial variation across order support risk prevention management...
Abstract Nyamulagira, located in the east of Democratic Republic Congo on western branch East African rift, is Africa’s most active volcano, with an average one eruption every 3 years since 1938. Owing to socio-economical context that region, volcano lacks ground-based geodetic measurements but has been monitored by interferometric synthetic aperture radar (InSAR) 1996. A combination 3D Mixed Boundary Element Method and inverse modelling, taking into account topography source interactions,...
Abstract. Landslides and flash floods are geomorphic hazards (GHs) that often co-occur interact. They generally occur very quickly, leading to catastrophic socioeconomic impacts. Understanding the temporal patterns of occurrence GH events is essential for hazard assessment, early warning, disaster risk reduction strategies. However, information poorly constrained, especially in frequently cloud-covered tropical regions, where optical-based satellite data insufficient. Here we present a...
Flash floods frequently co-occur with landslides, during which landslides can deliver large amounts of hillslope material into the river system. Their interaction lead to exacerbated and destructive impacts. While such geo-hydrological hazards are typically triggered by intense rainfall over only a few hours, daily monthly variations in drive soil moisture changes alter their likelihood occurrence, alone or combination. The influence this preconditioning on compounding flash floods, however,...