Introduction: The 2015 M s 5.8 Alxa Left Banner earthquake (Alxa eathquake) struck a sparsely inhabited area of Inner Mongolia, northwestern China. However, as first > 5 event on the Ningxia–Inner Mongolia segment North–South seismic zone for 24 years, is considerable scientific interest. Methods: In this study, distribution sequence was redetermined via analysis data from permanent and ...

Stress accumulation rates along the primary segments of the San Andreas Fault system are computed using a three-dimensional (3-D) elastic half-space model with realistic fault geometry. The model is developed in the Fourier domain by solving for the response of an elastic halfspace due to a point vector body force and analytically integrating the force from a locking depth to infinite depth. Th...

We analyze Bouguer anomalies in/around the focal region of the 2016 Kumamoto earthquake to examine features, such as continuity, segmentation and faulting type, of the active fault zones related to the earthquake. Several derivatives and structural parameters calculated from a gravity gradient tensor are applied to highlight the features. First horizontal and vertical derivatives, as well as a ...

We describe the morphology of a large and complex graben structure in the western Thauma-sia region (the " Thaumasia graben " [1] or TG). We consider possible fault geometries, determine extension , and discuss shortly possible models for its origin. Background: Situated at the western border of the Thaumasia plateau, the TG is one of the most prominent fault-bounded structures on Mars. It is ~...

In recent years it has been recognized that the level of shear and normal stress along a fault can vary; thus the stress is spatially and temporally inhomogeneous. Moreover, it has also been suspected that faults might interact in some way, with the result that a variety of earthquake magnitudes might be produced along a given length of fault at varying times. In order to explore these ideas we...

We determined the centroid moment tensor (CMT) solutions of earthquakes that occurred along the North Anatolian fault (NAF) beneath the Sea of Marmara and the Aegean Sea, using data obtained from Turkey’s broadband seismograph network. The CMT solution of the 2014 Aegean Sea earthquake (Mw 6.9) represents a strike-slip fault, consistent with the geometry of the NAF, and the source-time function...

During large earthquakes, seismic sources tend to split in several sub-events that rupture neighboring fault patches called segments. The scaling of such segmentation plays a decisive role earthquake dynamics, especially for strike-slip events. Using numerical modeling we demonstrate when pristine layer brittle material is sheared, the first oblique Riedel fractures nucleate with regular spacin...

Extensional growth folds form ahead of the tips propagating normal faults. These can accommodate a considerable amount extensional strain and they may control rift geometry. Fold-related surface deformation also sedimentary evolution syn-rift depositional systems. Thus, by examining stratigraphic record, we constrain four-dimensional folds, which in turn provides record fault broader history. H...

Ultimately, seismotectonic studies seek to provide ways of assessing the timing, magnitude and spatial extent of future earthquakes. Ample observations document the spatial variability in interseismic coupling, defined as a degree of locking of a fault during the period of stress build-up between seismic events: fully or nearly locked fault patches are often surrounded by aseismically creeping ...

We analyze pervasive and discontinuous deformation associated with small faults in a quartz–syenite body in southern Israel. The analysis includes detailed mapping, measurement of in-situ mechanical rock properties and microstructural study of the faults. The mapped faults have 1–100-m-long horizontal traces, consisting of linked, curved segments; the segmented nature of the faults is also appa...