Potential of 3-D vertical seismic profiles to characterize seismogenic fault zones

Characteristics of chlorites in seismogenic fault zones: the Taiwan Chelungpu Fault Drilling Project (TCDP) core sample

Y. Hashimoto 1 , O. Tadai 2 , M. Tanimizu 3 , W. Tanikawa 3 , T. Hirono 4 , K. Aoike 5 , T. Ishikawa 3 , M. Murayama 6 , W. Soh 3 , S. R. Song 7 , K. Fujimoto 8 , T. Fukuchi 9 , M. Ikehara 6 , H. Ito 4 , H. Kikuta 3 , M. Kinoshita 10 , W. Lin 3 , K. Masuda 11 , T. Matsubara 9 , O. Matsubayashi 12 , T. Mishima 6 , K. Mizoguchi 13 , N. Nakamura 14 , K. Otsuki 14 , M. Sakaguchi 2 , T. Shimamoto 15...

Subsurface Imaging with Reverse Vertical Seismic Profiles

A novel imaging process, referred to as vector image isochron (VII) migration, is specifically designed to reduce artifacts caused by arrays with limited apertures. By examining the assumptions behind generalized Radon transform (GRT) migration, a new approach is found which identifies and suppresses array artifacts, based on the array geometry and the migration earth model. The new method work...

Seismic Measurements of the Internal Properties of Fault Zones

-The internal properties within and adjacent to fault zones are reviewed, principally on the basis of laboratory, borehole, and seismic refraction and reflection data. The deformation of rocks by faulting ranges from intragrain microcracking to severe alteration. Saturated microcracked and mildly fractured rocks do not exhibit a significant reduction in velocity, but, from borehole measurements...

Electromagnetic View of the Seismogenic Zones Beneath Island Arcs

Temporal variations of seismic anisotropy in seismogenic areas :

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...