Spatial seismicity variations along convergent plate boundaries

Stress Diffusion Along Rupturing Plate Boundaries

An analysis is made of viscoelastic lithosphere/asthenosphere coupling in the time-dependent redistribution of stress along plate boundaries or other seismic lineaments following great earthquakes. The study is based on a generalization by Rice of Elsasser's model of stress-diffusion, i which general elastic plane stress deformations are allowed in lithospheric plates which are coupled in an el...

Variations in slab dip along the subducting Nazca Plate, as related to stress patterns and moment release of intermediate-depth seismicity and to surface volcanism

[1] Abstract: The subducting Nazca Plate shows a high degree of along-strike heterogeneity in terms of intermediate-depth seismicity ( 70–300 km), orientations of slab stress, and volcanism. We compile the intermediate-depth earthquakes of South America from the Harvard Centroid Moment Tensor (CMT) catalogue to determine along-strike dip variations, and we explore the variable level of correlat...

Weak Tectono-Magmatic Relationships along an Obliquely Convergent Plate Boundary: Sumatra, Indonesia

1 Dipartimento di Scienze, Università Roma Tre, Rome, Italy, 2 Aix Marseille Univ, CNRS, IRD, INRA, Coll France, CEREGE, Aix-en-Provence, France, 3 Istituto Nazionale Geofisica e Vulcanologia, Sezione Bologna, Italy, 4 Centre National de la Recherche Scientifique, Institut des Sciences de la Terre de Paris (ISTeP), UPMC Univ Paris 06, Sorbonne Universités, Paris, France, 5 Geological Engineerin...

Mapping and Analyzing the Volcano-Petrology and Tectono-Seismicity Characteristics Along the Syrian Rift – NW the Arabian Plate

Upper plate stressing and seismicity in the subduction earthquake cycle

We investigate upper plate stressing during the earthquake cycle in a subduction segment, using three-dimensional (3-D) elastic models to address the effects of strongly heterogeneous coupling along strike of the interplate interface. We show how heterogeneity controls the locations and mechanisms of seismicity in the upper plate. Oblique subduction segments, two from the Aleutians (Andreanof I...