Volcanic rocks are shaped by many processes, including volcanism, chemical alteration and weathering. These processes change the rock's properties, making it difficult to predict volcanic hazards or design tunnels and mines in volcanic areas. In this study, we build on earlier research to connect unique spectral signatures that can be remotely imaged using hyperspectral cameras to the density, porosity, strength, and stiffness of volcanic rocks.

Rock fracture connectivity is key for oil/gas, geothermal energy, and nuclear waste storage. This study predicts the zero-percolation threshold – when fractures connect – using simulations. A model links this threshold to fracture number, length, and orientation, enabling fast predictions. Tests on simulated and real fractures confirm its accuracy across sizes/orientations. Provides key tool for subsurface engineering.

We present a thermodynamically consistent derivation of extended Biot poroelasticity, showing that Gassmann, Brown–Korringa, and related models emerge as special cases. Our formulation clarifies the conditions under which Gassmann’s relation holds and extends it by incorporating off-diagonal Hessian terms. Symbolic Maple code with consistency checks ensures full transparency, reproducibility, and accessibility for further research.

Rheology of polymineralic rocks is crucial to unravel the strain and stress distribution in Earth’s middle crust, with implications for seismicity or geothermal systems. Our experimental study of the viscous rheology of natural, fine-grained granitoid rocks shows that dissolution–precipitation creep and pinning are active in extremely weak narrow zones. Due to the polymineralic character, strain localizes with and without a precursory fracture in zones weaker than monomineralic quartz.

We address the transition between the Paleozoic Variscan and Alpine Mesozoic–Cenozoic cycles using tectono-stratigraphy and thermochronology. This transition unfolds through a multi-phase rifting history. An initial rifting stage occurred in the early Permian, followed in the early–middle Permian by a phase of transcurrent tectonics. This was succeeded by a period of erosion/non-deposition in the middle Permian. Crustal stretching in the Middle Triassic marked the onset of the Alpine cycle.

We investigate women's representation in seismology to raise awareness of existing gender disparities. By analysing the authorship of peer-reviewed articles, we identify lower representation of women among single authors, high-impact authors, and highly productive authors. Seismology continues to be a male-dominated field, and trends suggest that parity is decades away. These gaps are an obstacle to women’s career advancement and, if neglected, may perpetuate the leaky-pipeline problem.

Infrequent eruptions of acidic magma are one of the most dangerous natural phenomena, but almost none of them have been witnessed by modern science. We present the first systematic characterization of seismicity recorded near an erupting acidic volcano (Cordón Caulle 2011). We define different phases of unrest and eruption, which combined with previous findings allows us to discuss the main processes associated with this type of violent eruption, with implications for their volcanic hazard.