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March 19, 2019 (v1)Conference paperUploaded on: June 2, 2023
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February 19, 2018 (v1)Photo
Optical fiber is a fascinating concept that makes a silica thread the fineness of a hair, a guide for light over very long distances, and therefore information propagating at the speed of light. This invention, which mainly dates back to the 1960s, has revolutionized the way we communicate. For a few years now, it has also revolutionized our...
Uploaded on: December 4, 2022 -
November 18, 2020 (v1)Publication
Optical fiber is a fascinating concept that makes a silica thread the fineness of a hair, a guide for light over very long distances, and therefore information propagating at the speed of light. This invention, which mainly dates back to the 1960s, has revolutionized the way we communicate. For a few years now, it has also revolutionized our...
Uploaded on: December 4, 2022 -
February 2018 (v1)Journal article
For some megathrust earthquakes, the rupture extends to the solid Earth's surface, at the ocean floor. This unexpected behaviour holds strong implications for the tsunami potential of subduction zones and for the physical conditions governing earthquakes, but such ruptures occur in underwater areas which are hard to observe, even with current...
Uploaded on: February 28, 2023 -
September 21, 2018 (v1)Publication
International audience
Uploaded on: December 4, 2022 -
January 25, 2024 (v1)Journal article
Distributed Acoustic Sensing (DAS) is a photonic technology allowing toconvert fiber-optics into long (tens of kilometers) and dense (every few meters) arrays of seismo-acoustic sensors which are basically measuring the strain of the cable all along the cable. The potential of such a distributed measurement is very important and has triggered...
Uploaded on: February 23, 2024 -
2023 (v1)Journal article
Distributed Acoustic Sensing (DAS) is a photonic technology allowing toconvert fiber-optics into long (tens of kilometers) and dense (every few meters) arrays of seismo-acoustic sensors which are basically measuring the strain of the cable all along the cable. The potential of such a distributed measurement is very important and has triggered...
Uploaded on: August 24, 2024 -
July 1, 2019 (v1)Journal article
Our understanding of earthquake sources is limited by the availability and the quality of observations and the fidelity of our physical models. Uncertainties in our physical models will naturally bias our inferences of subsurface fault slip. These uncertainties will always persist to some level as we will never have a perfect knowledge of the...
Uploaded on: December 4, 2022 -
August 1, 2018 (v1)Journal article
The ill-posed nature of earthquake source estimation derives from several factors including the quality and quantity of available observations and the fidelity of our forward theory. Observational errors are usually accounted for in the inversion process. Epistemic errors, which stem from our simplified description of the forward problem, are...
Uploaded on: December 4, 2022 -
December 9, 2018 (v1)Conference paper
Finite fault slip inversions are constrained by observational data of surface displacement and Green's functions calculated via a forward model of surface deformation. Although observational techniques in space geodesy have improved greatly in recent years, models of earthquake deformation generally do not include realistic Earth structure....
Uploaded on: December 4, 2022 -
December 2019 (v1)Journal article
After large earthquakes, parts of the fault continue to slip for days to months during the afterslip phase, a behaviour documented for many earthquakes. Yet, little is known about the early stage, i.e., from minutes to hours after the mainshock. Its detailed study requires continuous high-rate position time series close to the fault, and...
Uploaded on: December 4, 2022 -
2020 (v1)Journal article
Our understanding of earthquakes is limited by our knowledge, and our description, of the physics of the Earth. When solving for subsurface fault slip, it is common practice to assume minimum complexity for the Earth's characteristics such as topography, fault geometry and elastic properties. These characteristics are difficult to include in...
Uploaded on: December 4, 2022 -
November 9, 2021 (v1)Journal article
Abstract. It is well-established that the post-seismic slip results from the combined contribution of seismic and aseismic processes. However, the partitioning between these two modes of deformation remains unclear due to the difficulty of inferring detailed and robust descriptions of how both evolve in space and time. This is particularly true...
Uploaded on: December 3, 2022 -
September 10, 2018 (v1)PublicationThe detection of early postseismic deformation and its significance using high-rate GNSS observation
International audience
Uploaded on: December 4, 2022 -
November 9, 2021 (v1)Journal article
It is well-established that the post-seismic slip results from the combined contribution of seismic and aseismic processes. However, the partitioning between these two modes of deformation remains unclear due to the difficulty of inferring detailed and robust descriptions of how both evolve in space and time. This is particularly true just...
Uploaded on: February 4, 2024 -
February 11, 2019 (v1)Journal article
After large earthquakes, parts of the fault continue to slip for days to months during the afterslip phase, a behaviour documented for many earthquakes. Yet, little is known about the early stage, i.e., from minutes to hours after the mainshock. Its detailed study requires continuous high-rate position time series close to the fault, and...
Uploaded on: February 4, 2024 -
April 11, 2023 (v1)Journal article
Abstract As tsunamis propagate across open oceans, they remain largely unseen due to the lack of adequate sensors. To address this fundamental limitation of existing tsunami warnings, we investigate Global Navigation Satellite Systems (GNSS) data to monitor the ionosphere Total Electron Content (TEC) for Traveling Ionospheric Disturbances...
Uploaded on: March 16, 2024 -
2020 (v1)Journal article
La fibre optique est un concept fascinant qui fait d'un fil de silice de la finesse d'un cheveu un guide de lumière sur de très grandes distances, propageant l'information à la vitesse de la lumière. Cette invention, qui remonte aux années 1960, a révolutionné nos façons de communiquer. Depuis quelques années maintenant, elle est en passe de...
Uploaded on: December 3, 2022 -
December 9, 2018 (v1)Publication
Whereas the spatial and temporal evolution of early postseismic slip (i.e., the first few hours) has been shown to be complex, we do not know well the mechanisms that control its behaviour. One pending question is to know whether or not the rate-and-state friction law is required to explain it, or if the rate-dependent friction law,...
Uploaded on: December 4, 2022 -
September 10, 2018 (v1)Publication
International audience
Uploaded on: December 4, 2022 -
August 29, 2022 (v1)Conference paper
Distributed Acoustic Sensing (DAS) is a nascent technology that facilitates the measurement of vibrations along fibre-optic telecommunication cables, which has numerous novel applications in many domains of science and engineering. In the present study, we use DAS to analyse traffic along a fibre-optic cable deployed along a major road in Nice,...
Uploaded on: October 18, 2023 -
September 23, 2021 (v1)Publication
Distributed Acoustic Sensing (DAS) is a novel vibration sensing technology that can be employed to detect vehicles and to analyse traffic flows using existing telecommunication cables. DAS therefore has great potential in future "smart city" developments, such as real-time traffic incident detection. Though previous studies have considered...
Uploaded on: December 4, 2022 -
April 14, 2021 (v1)Journal article
International audience
Uploaded on: December 4, 2022 -
October 31, 2021 (v1)Conference paper
International audience
Uploaded on: December 3, 2022 -
2023 (v1)Journal article
Summary Distributed Acoustic Sensing (DAS) enables data acquisition for underwater Earth Science with unprecedented spatial resolution. Submarine fibre optic cables traverse sea bottom features that can lead to suspended or decoupled cable portions, and are exposed to the ocean dynamics and to high rates of marine erosion or sediment...
Uploaded on: April 20, 2023