Role of critical stress in quantifying the magnitude of fluid-injection triggered earthquakes.

Here we define and report the relationship between the maximum seismic magnitude (M) and injection volume (ΔV) through fluid-injection fault-reactivation experiments and analysis. This relationship incorporates the in situ shear modulus (G) and fault pre-stress as a fraction of the strength drop (c), expressed as M = c/(1-c) GΔV. Injection response defines a sigmoidal relation in space with unit gradient limbs linked by an intermediate up-step.

Heterogeneous Subgreenschist Deformation in an Exhumed Sediment-Poor Mélange.

Many described subduction complexes (or mélanges) exhumed from seismogenic depths comprise thick, turbidite-dominated sequences with deformed zones containing clasts or boudins of more competent sandstone and/or basalt. In contrast, many active subduction zones have a relatively small thickness of sedimentary inputs (<2 km), turbidite sequences are commonly accreted rather than subducted, and the role of pelagic sediments and basalt (lavas and hyaloclastites) in the deforming zone near the plate interface at <20 km depth is poorly understood. Field investigation of Neoproterozoic oceanic sequences accreted in the Gwna Complex, Anglesey, UK, reveals repeated lenticular slices of variably sampled ocean plate stratigraphy (OPS) bounded by thin mélange-bearing shear zones.

A Q-methodology study among caregivers of people with moderate intellectual disabilities on their clients' health care: An example in oral health.

Background: People with intellectual disabilities have less favourable outcomes in-among others-oral health variables, compared to their peers without intellectual disabilities. Before being able to develop target interventions for caregivers, all their prevailing viewpoints regarding oral hygiene need to be identified.

Methods: This Q-methodology study-conducted among 40 caregivers of care-dependent Institutionalized living persons with moderate intellectual disability-used by-person factor analysis to reveal clusters of caregivers based on the way their statements were sorted.