Passive seismic data were acquired along a 2.8 km long profile in the Sudret area of Gotland, Sweden, as part of a feasibility study for storage of CO₂ below the Baltic Sea. Virtual shot gathers were retrieved by seismic interferometry. Both the body waves and surface waves provide high-quality images of the top of the Ordovician formation and have a good consistency with the borehole section. Our results show that passive data can be used for mapping some general geological features in Gotland.

We propose a new method to map faults automatically in DEMs and measure long-term crustal deformation in rift contexts. By combining our data with rock ages, we reconstruct rift evolution in Afar during the last 4.5 Myrs. We show that the rift axis is most active, with rifting propagating northwest over time. Here magma promotes crustal deformation and faulting caused by dike opening. In the southern sector Afar, two fault systems respond to different motions of diverging tectonic plates.

We used computer models to study how mountains formed by the collision of tectonic plates can later affect the breakup of these same plates. Our results show that in large, warm mountain belts, new faults form due to the orogen being overall weak, while in smaller, colder belts, breakup follows old fault zones. Microcontinents that were accreted during collision can create new continental fragments during extension. These findings help explain how past geological events shape continent margins.

In Germany, claystones are studied for their suitability as host-rocks for the disposal of high-level radioactive waste. The MATURITY project systematically investigates how gradual burial affects key barrier properties in the Lower Jurassic Amaltheenton Formation of the Lower Saxony Basin (Germany). Understanding these changes helps assess claystone suitability for long-term waste isolation, improving site selection for deep geological repositories.

This study applied fat ray travel time tomography to image the geothermal testbed at the BedrettoLab. An active seismic crosshole survey provided a dataset of 42'843 manually picked first breaks. The complex major fault zone was successfully imaged by a 3D velocity model and validated with wireline logs and geological observations. Seismic events from hydraulic stimulation correlated with velocity structures, "avoiding" very high and low velocities, speculatively due to stress gradients.

Reflection seismic data can provide high resolution images of the Earth's crust and allow a better understanding of crustal structure on all continents. In this paper we revisit reflection seismic data that were acquired previously across the central part of the Scandinavian peninsula. Merging of individual components of the data set in a more optimal manner resulted in a new image of the crust below the Scandinavian Caledonides with a revised interpretation of the crustal structure in the west.

Geological storage of CO₂ has emerged again in recent years as a complement to reducing CO₂ emissions to the atmosphere. The Swedish government recently gave the task of further studying the potential for CO₂ storage within Swedish territory to the Geological Survey of Sweden. We report here on results from investigations on southern Gotland island. We find that we can map several geological formations of interest and that the rock is seismically anisotropic.

This study presents a new geological model of the Fano-Pesaro offshore area, refining its tectonic framework. We identified multiple fault detachments at different depths, influencing thrust system dynamics and deformation. This work highlights the importance of integrating seismic and borehole data, even legacy, to build reliable subsurface models. These findings contribute to improved seismic hazard assessment and support offshore energy development and carbon storage projects.

To improve current knowledge of deep geological structures in Hainaut (SW Belgium), a new detailed regional gravity anomaly map has been produced. This has involved the integration and harmonisation of legacy and new non-standardised cross-border gravity data achieved by developing an adaptive and open-source gravimetric workflow. Resulting map shows the correlation between the anomaly and the Meso-Cenozoic thickness deposits but also new anomalies that may be due to deep-seated structures.

Two reflection seismic (semi-)regional profiles were acquired to map the regional reflectivity of the Koillismaa Layered Igneous Complex in north-eastern Finland. Several reflections up to a depth of 5–6 km are mapped. The top of the magma conduit associated with KLIC is successfully revealed and it is interpreted that there might be a second magma conduit below the exposed intrusion. The study helped in better understanding of the regional structural geology of the area.

The manuscript re-analyses seismic data from the UPPLAND profile in the Fennoscandian Shield, focusing on Vp and Vs velocity models. Significant differences between prior and present models emerge in the lower crust and mantle and in the Moho depth. The new model suggests Vp of 7.05–7.17 km/s in the lower crust and 8.05 km/s in the upper mantle, with Moho at 43–50 km. Two tectonic interpretations are proposed to explain these findings, emphasizing the complexities of seismic data interpretation.

We analyse the drainage network in a depressed area in the southern Spain. To do that, we analyzed streams and endorheic basins together with fold and faults. Results showed that the Atlantic-Mediterranean water divide in the study area will probably move NW-ward and the endorheic basins will still endure, hosted in a depressed area located between two active mountain ranges. Our results confirm that active tectonics have reshaped the area more intensively than previously considered.

We conducted load stepping deformation experiments on glaucophane aggregates in the shear geometry, where we constrained dislocation creep and dislocation glide flow laws. We then extrapolate our flow laws to geologic conditions to better understand subduction zone rheology.

Sub-surface geometries of ancient faults must be mapped using high-resolution geophysical surveys using reflected seismic waves. Several such surveys in southern Canada map faults, many of which host significant gold or nickel deposits. Reflectors are considered upper crustal brittle, lava flows if folded or broken or mid-crustal if mostly parallel. Steep fault zones formed first in ocean settings when the lavas erupted. Folds and horizontal shortening occurred during later mountain building.