Institut des Sciences de la Terre

Magnetohydrodynamic drag on an oscillating sphere in a rotating spherical cavity

Oscillating-sphere drag is a classical fluid-mechanics problem, yet no theory simultaneously accounts for confinement, rotation, viscosity and magnetic fields. We consider a conducting sphere undergoing translational oscillations inside a rotating spherical cavity, modelling conf...

Ground-motion dataset for shallow earthquakes in Colombia

Abstract. The tectonics of Colombia is characterised by the interaction of multiple oceanic plates subducting beneath the continent, generating active transpressional deformation and a wide range of subduction-related and crustal earthquakes. We present a flatfile containing grou...

A memory of Paleozoic to Quaternary Greenhouse climates recorded in Southern African regolith

Abstract In this article, we explore the potential of iron-rich duricrust regoliths from old erosional anorogenic surfaces to record clues of the long-term continental paleoclimatic evolution. We coupled geochemical, mineralogical and geochronological analyses on iron oxides and...

On the use of seismic noise studies for landslide rock block hazard assessment

As emphasized by Pazzi et al. 1 , robust constraints on rock-mass volume are essential for landslide hazard assessment. However, such estimates are inherently challenging due to (i) complex geometries, (ii) heterogeneous material properties, and (iii) poorly constrained boundary...

Mortars and plasters at Herod's Caesarea Maritima: integration of imported and local construction technologies

Abstract Building materials from different architectural elements at Herodian Caesarea Maritima (22–4 BCE ) provide evidence for a variety of compositions tailored to specific construction functions, demonstrating the extent of Roman technological influence on Herod's architectur...

Experimental constraints on pre-eruptive conditions at Nabro volcano, Eritrea, 2011, and implications for sulphur emissions

Abstract We present new experimental constraints on the pre-eruptive magma storage conditions at Nabro Volcano, Eritrea, prior to its 2011 eruption, and discuss the implications for sulphur emissions. We find that the magma was likely stored in the shallow crust prior to eruption...

Addressing anthropogenic noise and electrical anisotropy hints in magnetotelluric data from the Annecy area (French Pre-Alps)

The magnetotelluric (MT) method is a widely used tool for geothermal reservoir exploration due to its capability of imaging fluids in the Earth’s crust. However, in urbanised environments, its application is often challenged by anthropogenic noise and low signal-to-noise ratios....

Magma-induced midcrustal flow and high-temperature metamorphism: Insights from the early Mesozoic Yunkai massif (South China) and tectonic implications

The way in which partial melting weakens the middle continental crust and triggers lateral flow is fundamental to understanding orogenic processes, yet the specific roles of magmatic heat and deformation remain debated. We addressed this issue through an integrated study of the e...

Hematological profiles and preventive-practice characteristics among patients with podoconiosis: A case-control study in Musanze District, Rwanda

Background Podoconiosis is a chronic, disfiguring, non-filarial form of lymphedema caused by prolonged barefoot exposure to irritant soil. An estimated four million people are affected globally, with cases documented in more than 32 countries, 18 of which are in Africa. In Rwanda...

Iron Isotopes Reveal Fe Export Driven by Change of Tropical Weathering Regime

Abstract Unraveling paleoenvironmental signals recorded in laterites is crucial for quantifying weathering‐driven elemental fluxes at the Earth's surface. New stable iron isotope data (δ 56 Fe), combined with (U‐Th)/He ages in Fe‐oxides from a ferruginous duricrust from French Gu...

Termites play a crucial role in forming major tropical soils: insights from a deep Ferralsol

Abstract Soil bioturbation is increasingly recognized as a key driver of pedogenesis in tropical ecosystems, influencing above- and below-ground biodiversity, nutrient cycling, and aggregate stability across different spatial and temporal scales. This ecological process may play...

Drainage divide dynamics modulated by erosion-driven landscape adjustment in a low-deformation setting

The Vosges Mountains (northeast France) are a mid-altitude mountain range with peaks reaching ∼1500 m a.s.l., in a low-deformation setting. Despite this, they maintain significant topographic relief (up to ∼1000 m), characterized by deeply incised valleys and broad, rounded uplan...

Very‐Long‐Period Seismic Signals During Lateral Dike Propagation at Piton de La Fournaise Volcano

Abstract We report a previously undocumented sequence of very long period (VLP) signals preceding the September 2022 eruption at Piton de la Fournaise. These events occurred during lateral magma propagation and exhibit quasi‐periodic sawtooth‐shaped displacement transients. Seism...