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6 papers · 2 filters
Contributions to the geomagnetic secular variation from a reanalysis of core surface dynamics
Olivier Barrois, Nicolas Gillet, Julien Aubert
We invert for motions at the surface of Earth's core under spatial and temporal constraints that depart from the mathematical smoothings usually employed to ensure spectral converg…
Assimilation of ground and satellite magnetic measurements: inference of core surface magnetic and velocity field changes
Olivier Barrois, Magnus D. Hammer, Christopher C. Finlay +2
We jointly invert for magnetic and velocity fields at the core surface over the period 1997-2017, directly using ground-based observatory time series and measurements from the CHAM…
Simulation des écoulements gravitaires avec les modèles d'écoulement en couche mince: état de l'art et exemple d'application aux coulées de débris de la Rivière du Prêcheur (Martinique, Petites Antilles)
Marc Peruzzetto, BRGM), Gilles Grandjean (BRGM) +10
Quantifying the propagation of landslides is a key step for analyzing gravitational risks. In this context, thin-layer models have met a growing success over the past years to simu…
PyOcto: A high-throughput seismic phase associator
Jannes Münchmeyer
Seismic phase association is an essential task for characterising seismicity: given a collection of phase picks, identify all seismic events in the data. In recent years, machine l…
Numerical simulations of the latest caldera-forming eruption of Okmok volcano, Alaska
Alain Burgisser, Ally Peccia, Terry Plank +1
The 2050 14C yBP caldera-forming eruption of Okmok volcano, Alaska, had a global atmospheric impact. The associated global climate cooling was driven by the amount of sulfur inject…
Slow slip detection with deep learning in multi-station raw geodetic time series validated against tremors in Cascadia
Giuseppe Costantino, Sophie Giffard-Roisin, Mathilde Radiguet +3
Slow slip events (SSEs) originate from a slow slippage on faults that lasts from a few days to years. A systematic and complete mapping of SSEs is key to characterizing the slip sp…