A5028123420- earthquake and tectonic studies
- Seismology and Earthquake Studies
- Earthquake Detection and Analysis
- Seismic Waves and Analysis
- Geological and Geochemical Analysis
- Microbial Community Ecology and Physiology
- High-pressure geophysics and materials
- Geological and Geophysical Studies Worldwide
- Polar Research and Ecology
- Indoor Air Quality and Microbial Exposure
- Microbial Metabolism and Applications
- Landslides and related hazards
- Genomics and Phylogenetic Studies
- Geophysics and Gravity Measurements
Université de Technologie de Compiègne
2023-2025
Institut de physique du globe de Paris
2024
Centre National de la Recherche Scientifique
2021-2024
Sorbonne Paris Cité
2024
Université Paris Cité
2024
CEA DAM Île-de-France
2020-2023
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2020-2023
Université Côte d'Azur
2021-2023
Observatoire de la Côte d’Azur
2021-2023
Institut de Recherche pour le Développement
2021-2023
A novel bacterium, designated 19SA41, was isolated from the air of Icelandic volcanic island Surtsey. Cells strain 19SA41 are Gram-stain-negative, strictly aerobic, non-motile rods and form pale yellow-pigmented colonies. The grows at 4–30 °C (optimum, 22 °C), pH 6–10 7.5) with 0–4% NaCl 0.5%). Phylogenetic analyses based on 16S rRNA gene sequences showed that belonged to genus Flavobacterium is most similar xinjiangense DSM 19743 T , a sequence similarity 96.52%. new contained iso-C 15 : 0...
The point source parameters of the 11 November 2019 Le Teil earthquake (Mw 4.9) in France are revisited. Previous hypocenter determinations either located it on wrong side causative fault, or had to restrain depth ranges obtain epicenters compatible with fault geometry. Here, relocation is carried out three different approaches: (1) using as a master event an aftershock well-recorded by post-earthquake temporary seismic network; (2) optimizing velocity model two subareas; and (3) quarry...
On November 11, 2019, a M w 4.9 earthquake hit the region close to Montelimar (lower Rhône Valley, France), on eastern margin of Massif Central external part Alps. Occuring in moderate seismicity area, this is remarkable for its very shallow focal depth (between 1 and 3 km), magnitude, large damages it produced several villages. InSAR interferograms indicated rupture about 4 km long reaching surface reactivation ancient NE–SW La Rouvière normal fault reverse faulting agreement with...
SUMMARY On 18 March 2021 an earthquake of magnitude Mw = 6.0 occurred offshore the Algerian coasts and generated a tsunami with amplitudes smaller than few millimetres crossing western Mediterranean Sea. The objective this study is threefold: first, to determine whether seismic sources calculated in context early warning are relevant; secondly, simulations able reproduce tide-gauge observations thirdly, define sensitivity grid resolutions parameters. In Sea, very small number available...
SUMMARY Metropolitan France is a region of slow tectonic deformation with sparse seismicity. On 11 November 2019, the ML 5.4 Le Teil earthquake became largest seismic event recorded in last 16 yr. This was by national networks and also wide variety other geophysical techniques including infrasound InSAR measurements. These complementary technologies offer opportunity to investigate detail source characteristics associated ground motion attenuation. Both waveform inversions interferogram...
SUMMARY A method of moment tensor inversion with a grid search on the source location and time is presently considered by French Tsunami Service Provider (TSP or CENALT in French) for rapid earthquake tsunami warning western Mediterranean Sea North-East Atlantic Ocean. The approach follows GRiD MT (Grid-based Real-time Determination Moment Tensors) methodology already implemented other regions. Here, we show developments made towards its implementation moderate to large earthquakes...
Surface microbes are aerosolized into the atmosphere by wind and events such as dust storms volcanic eruptions. Before they reach their deposition site, experience stressful atmospheric conditions which preclude successful dispersal of a large fraction cells. In this study, our objectives were to assess compare lithospheric bacterial cultivable diversity two geographically different Icelandic sites: island Surtsey Fimmvörðuháls mountain, predict origin culturable from these sites, select...
On November 11, 2019, a Mw 4.9 earthquake hit the region close to Montelimar (lower Rhône Valley, France), on eastern margin of Massif Central external part Alps. Occuring in moderate seismicity area, this is remarkable for its very shallow focal depth (between 1 and 3 km), magnitude, large damages it produced several villages. InSAR interferograms indicated rupture about 4 km long reaching surface reactivation ancient NE-SW La Rouviere normal fault reverse faulting agreement with...
Eruptions of Piton de la Fournaise volcano (Reunion Island, France) are preceded by intense pre-eruptive seismicity swarms characterized hundreds, or even thousands micro earthquakes (magnitude < 2). These volcano-tectonic events triggered the upward migration magma toward surface and their location provides important information regarding future eruption location. Yet, large number earthquakes, it is difficult to locate them all during swarms. Hence, we have implemented an approach at...
On March 18, 2021, a magnitude Mw 6.0 earthquake occurred offshore the Algerian coasts near Bejaia, resulting in tsunami with amplitudes smaller than few millimeters that crossed western Mediterranean Sea. This study pursues three primary objectives: firstly, to assess ability of simulations replicate tide-gauge observations; secondly, ascertain relevance seismic sources calculated within context early warning systems, against generation and thirdly, evaluate sensitivity grid resolutions...
&lt;p&gt;Metropolitan France is a region of slow tectonic deformation rates with sparse historical and instrumental seismicity, where geodesy not able to reach the required resolution in order resolve loadings. The few faults recognized as potential active rely on rare neotectonic slip rates, often integrated over geological scales.&lt;/p&gt;&lt;p&gt;In this context, M&lt;sub&gt;L&lt;/sub&gt;&amp;#160;5.4 Le Teil 2019 earthquake particular interest...
&lt;p&gt;In order to rapidly detect, locate and characterize seismic events at regional scale, we are currently improving the parametrization of a continuous grid-search moment tensor inversion tool, called GRiD MT (Grid-based Real-Time Determination Moment Tensor, Kawakatsu, 1998, Tsuruoka, 2009, Guilhem et al., 2011 2013, Menager 2021). Here, first design procedure for small moderate size earthquakes in south-eastern France, but target its expansion any potential regions interest....
&lt;p&gt;The aim of this study is to implement at the CEA a grid search moment tensor inversion scheme (GRiD MT) for rapid detection and characterization seismic events, monitor low moderate magnitude earthquakes in France. Given heterogeneity network crustal geology over country, we propose use combination source grids focusing on specific regions. The GRiD MT approach requires an extensive preliminary analysis define different parameters (velocity model, frequency band, stations)...