Large seismogenic faults consist of approximately meter-thick fault cores surrounded by hundreds-of-meters-thick damage zones. Earthquakes are generated rupture propagation and slip within dissipate the stored elastic strain energy in fracture frictional processes zone radiated seismic waves. Understanding this partitioning is fundamental earthquake mechanics to explain dynamic weakening causat...

The Zhangjiakou-Bohai fault zone (ZBFZ) is an important NW-trending active tectonic in North China. western section of ZBFZ characterized by frequent moderate and strong earthquakes. This a typical area for studying seismic volcanic activities. three-dimensional (3D) deep electrical structure the region was revealed using 3D electromagnetic inversion 143 magnetotelluric stations. results sugges...

Abstract Cataclasites are a characteristic rock type found in drill cores from active faults as well exposed fossil subduction faults. Here, cataclasites commonly associated with evidence for pervasive pressure solution and abundant hydrofracturing. They host the principal slip of regular earthquakes family so-called slow (episodic tremor, low to very frequency earthquakes, etc.). Slip velociti...

The causes for forearc basin and megathrust rupture zone segmentation are controversial. Nankai forearc, Japan, is separated into five domains based on topography: Enshu, Kumano, Muroto, Tosa, Hyuga. boundaries of these correspond to the limits large earthquakes. We examined geologic structure boundary region between Kumano Muroto off Kii Peninsula using multichannel seismic reflection data eva...

Des variations de paramètres physiques, avant et suite au séisme de Parkfield, 2004, Mw 6.0, et pouvant être associés à l’anisotropie sismique, ont été extraites des ondes de surface reconstruites par la méthode de cross-corrélation du bruit sismique. En effet, en cross-corrélant les trois composantes du bruit enregistré passivement à deux stations sismiques, on obtient le tenseur des corrélati...

behaviour characterized by nearly steady extrusion of a solid dacite plug and nearly periodic shallow earthquakes. Diverse data motivate the hypothesis that these earthquakes resulted from stick-slip motion along the margins of the plug as it was forced incrementally upward by ascending, solidifying, gas-poor magma. We formalize this hypothesis with a dynamical model that reveals a strong analo...

During the seismic wave propagation through the crust, the electromagnetic pulse can originate due to MHD conversion in this conductive medium. On the assumption of simple models of seismic wave excitation and attenuation, the problem is reduced to the analysis of a diffusionlike equation for a vector potential function. In this way, we need to change the classical gauge condition. A semianalyt...

Although the study of spatiotemporal variation a subsurface velocity structure is challenging task, it can provide description fault geometry as well important information on rheological changes caused by rupture. Our main objective to investigate whether faults be associated with seismogenic process before strong earthquake. For this purpose, 3D tomographic technique applied obtain P- and S-wa...