Cyclic loading experiments with fractured sandstone to investigate the evolution of fracture closure, permeability and specific stiffness

Demonstration of a stress-memory effect of fracture stiffness during progressive loading, similar to the "Kaiser Effect" in intact rocks

Progressive cyclic loading possibly leads to less permeability reduction compared to continuous cyclic loading

We characterized the large seismic events at the Kīlauea summit using particle motion, infrasound, and seismic moment tensor inversion

Near-field seismic observation is essential to resolve the isotropic contribution due to inflation of the Halema’uma’u reservoir

Two independent moment tensor inversions show that the caldera collapsed asymmetrically along the northwest corner

Ensemble of moment tensors of earthquakes are determined with Bayesian Neural Networks trained on synthetic waveforms

Uncertainties in centroid location and time as well as uncertainties in Earth's structure are considered by variational inference

Application to a subset of the 2019 Ridgecrest sequence and comparison to independent moment-tensor estimates shows robust performance

Plastic deformation at small and large strain is controlled by different rheological properties

The threshold strain between transient and steady-state deformation in on the order of elastic strain

The strength contrast between two regimes is determined by the plastic anisotropy of minerals

Inversion of thermochronometry data reveals significant diachrony in the timing of exhumation along the strike of the Aar Massif

Timing and pattern of exhumation are in good agreement with independent kinematic and age constraints from exposed shear zones

Neogene exhumation was mainly controlled by thick-skinned compressional tectonics and efficient erosion of overlying sedimentary units

From Sentinel-1 InSAR and GNSS observations, we resolve 3D average surface velocities from 2014-19 across the whole Afar rift zone

Extension is tightly focused around magmatic segments in northern Afar, but is distributed over 80-160 km in central and southern Afar

We observe current surface deformation at the Dallol, Erta'Ale, Nabro and Dabbahu-Manda-Hararo volcanic centres demonstrating their activity

Crustal and mantle structure for the top 180 km beneath southeastern U.S. was imaged using receiver functions and Rayleigh wave dispersion

Results support lower crustal delamination/relamination in the Carolina Terrane and Inner Piedmont of the southern Appalachian Mountains

High crustal Vp/Vs values observed in the Grenville Province suggest mafic intrusion associated with the Proterozoic Midcontinent rift

Earthquake’s coseismic phase time windows can significantly vary depending on the observer’s location

High-rate GNSS displacements together with seismic instruments reveal the onset of early postseismic deformation in various tectonic environments

GNSS-derived static offsets based on daily positioning can bias magnitude estimates and fault slip models by conflating coseismic and postseismic deformation

Hydrothermalism

Passive electric measurements

AUV engineering developments

Seafloor massive sulfide deposits can be modelled in 3D by inverting seafloor magnetic and gravity data

Geophysical inverse modelling enhances 3D deposit models, improving models derived from sparse drilling

An updated massive sulfide tonnage estimate of 2.17 Mt was determined for the Trans-Atlantic Geotraverse active mound

The “neighborhood algorithm” provides a robust methodology for testing layered anisotropy in the Earth's inner core

There is no significant change observed in the strength of anisotropy with depth in the inner core

The innermost inner core is defined as a gradual change in the slow propagation direction of anisotropy